Instead pressures drift down into the 60s, and then into the 50s, and then into the 40s as I drove along and the engine heats up. I use Bimmerlink to monitor temps, psi, etc. Do it looks like the HPFP is weak and dying? 2. E Chassis 135i, 335i, and X1 Stage 2 Bucketless LPFP Upgrades Sep 9, 2015 · Ive always read that anything below 1000 psi is a weak hpfp. Sep 11, 2020 · Buy Here: Fuel-It N54 Stage 2 LPFP. Charge Air Temp. My logs from MHD Stg 1, 1+, and 2+ all look similar in that regard. I have a bucketed 535 with a healthy hpfp and Im usually at 1800 psi under high load and rarely might drop to 1500 rail pressure on e60. This often looks something like a single Walbro 450 or Walbro 525 LPFP. What is a big deal, is your LPFP pressure dropping down to 40psi. Sounds like your LPFP is working just fine. I got the Cylinder injection cutout code. The new Walbro 450 pump provides approximately 100% more flow than stock and this assembly can be purchased one of three ways to meet your needs. This Mar 18, 2021 · Installed dual 450s the other day went to start the car ran for 1 second and died logged on jb4 lpfp psi and it ready like 5 psi. The single-turbo N54 also makes less torque but manages 125 horsepower more than the N54 twin turbo setup. I'm pretty sure this is what the DME is supposed to target. the same ISSUE still consists. I’ve went through 2 offbrand OEM pumps and now on a OEM VDO brand pump. N54 Stage 3 LPFP Upgrade. Upvote 0 Downvote Horsepower Supported: Single Shot: 600WHP on Racegas ethanol blends below E50 525WHP on Ethanol blends above E50 Double Shot: 700WHP+ on Racegas ethanol blends below E50 (750 with 285 upgrade) 650WHP on Ethanol blends above E50 (700 with 285 upgrade) (If you need more power, we suggest the PFS "External series" that us But as soon as I start driving the car and put a load on it. This solution provides up to 300% more flow than stock and this assembly can be purchased one of three ways to meet your needs. Many N54’s start with LPFP upgrades on stock turbos to support more power and higher E85 mixes. I have all lost boost back, power delivery is more linear, power comes on harder, faster, low speed/rpm driving is much smoother, rev matching down shifts are smoother. Port injection runs off the low-pressure fuel pump. As shown by the pink line up top, this OEM N54 LPFP remains in the ballpark of 60-70 throughout the entire pull. May 4, 2019 · I'm on Walbro 450 and on old fuel filter / pressure regulator I was idling at 72PSI, on new filter I'm idling at 82PSI. Aug 21, 2018 · HPFP - direct injection - typically operates from 600 to 2800 psi - On the N43/N53, N54/55 engines not the N51/52 . Over $15,000 Product Details. Jul 26, 2018 · I'm busy toying with the idea of doing upgrades on my stock N54 turbos on my 2009 135i. I also had issue where my LPFP would fluctuate wildly on full throttle, jumping from 20 to 140PSI! Jul 26, 2009 · This completely, 100%, improved performance across the board. The new Walbro 450 pump provides approximately 100% more flow than stock! LPFP upgrade kit without wiring harness / Do NOT upgrade pump / Do NOT add a Hobb's switch - $399. Aug 3, 2020 · I logged a pull after my new Stage 2 LPFP install. Safe above 55. Short throttle movement of less than 30% and less than 1 second are expected and normal. May 28, 2021 · To answer your question, LPFP pressure of 4975 hpa (hectopascal) is 72 PSI, and THAT is normal. This is a complete plug and play Low Pressure Fuel Pump (LPFP) upgrade that replaces your weak stock LPFP assembly with a new E85 certified one in an OEM pump assembly. Despite the 113k miles on this pump and demanding fuel flow from the upgraded inlets/outlets the LPFP manages to hold up even on 40% E85. . They provide approximately 50% more flow when combined with your stock pump. Dual 450HPs in tank feeding to the stock filter with the factory regulator removed This is a complete Low Pressure Fuel Pump (LPFP) upgrade that replaces your stock LPFP assembly with a new E85 certified one. I’m attaching the data log. 0L inline-6 direct injection engine was a totally new direction for BMW at the time. Changed ekpm2 to a ekpm3 that I knew worked good on my last car with this setup. May 27, 2021 · I'm having a bit of an issue, and I'm not sure if it's tune or mechanical. This is a complete Low Pressure Fuel Pump (LPFP) upgrade that replaces your stock LPFP assembly with a new E85 certified one. I believe most fuel maps ramp up to 15-17 magapascals which is over 2k psi. Maybe your filter clogged up somehow or really it is just fuel pump. Spool Performance N54 Stage 3 Bucketless LPFP. Also, your rail pressure dropping in the first log seems normal, I think it tries to target somewhere around 700 PSI at idle. I saw my hpfp sit at 700 psi on idle and my lpfp was sitting at 32-34 psi on idle. As we covered previously, the actual N54 HPFP is the most expensive part of the repair. Good call on the fuel lines from precision as I don't want to be dealing with those twice! May 3, 2022 · The car doesn't seem to have any issues other than the lack of rail pressure at WOT on the log and cutting spark when it drops. (Unlike other similar looking kits we use high quality OEM buckets and float assemblies for assembly ensuring trouble free operation long term). Based on the shop saying the LPFP pressure was inconsistent I decided to just upgrade the LPFP to a Walbro 450 since it was the cheaper of the 2 pumps and I wanted to run an E85 blend anyway. Sep 1, 2021 · N54 LPFP Upgrades for Port Injection. I have a regulator without pressure reference set to 80psi. I'm targeting 5525hpa (80psi) in the lpfp pressure table while under load. ) - (PSI, kPA, kPA) Fuel LPFP - (PSI, kPA, kPA) Fuel LPFP (Req. As "HotGuy" suggests, the 2AAF code relates to LPFP output, as measured by Low Pressure Sensor at engine. 00 If your current Low Pressure Fuel Pump (LPFP) is struggling to keep up, is old and tired, or you need an E85-compatible solution in an OEM pump assembly, this is the upgrade for you! I have index 12 injectors and the 525 pump. Time for a new Stage 2 LPFP 2007 335i, BMS DCI, BMS Chargepipe w/Tial BOV, ARM Catless Downpipes, silicone inlets, Bilstein B12 Prokit Suspension, Whiteline subframe bushings, Front/Rear M3 control arms, G-Plus FMIC, Stage 2 LPFP, Custom E40 tune by Justin (V8Bait), xHP stage 3 Fuel-It! N54/N55 fuel pump upgrades! E Chassis 135i, 335i, and X1 Stage 1 LPFP Upgrades! These kits are designed to be installed inline with your stock low-pressure fuel pump (LPFP). Under Fuel-It! N54/N55 fuel pump upgrades! E Chassis 135i, 335i, and X1 Stage 1 LPFP Upgrades! These kits are designed to be installed inline with your stock low-pressure fuel pump (LPFP). - (°F, °C, °C) (N54) Cyl1 Timing Cor; Cyl2 Timing Cor; Cyl3 Timing Cor; Cyl4 Timing Cor; Cyl5 Timing Cor; Cyl6 Timing Cor; ECT - Engine Coolant Temperature (°F, °C, °C) Fuel HPFP - (PSI, kPA, kPA) Fuel HPFP (Req. Oct 15, 2015 · HPFP takes this input and bumps it to 700-2500ish psi depending on load. The new Walbro 450 pump provides approximately 100% more flow than stock! Nov 25, 2019 · [Clearly low fuel pressure, WITHOUT INPA, but CONFIRMED by INPA screens you attach. Cost: $850+ Stage 3 LPFP kits are venturing into the territory of extreme fueling demands. Wound up being clogged vanos solenoids. I also had issue where my LPFP would fluctuate wildly on full throttle, jumping from 20 to 140PSI! Extended periods of throttle closure of 2 seconds or more and 40% or more closure normally indicates that boost control adjustment is needed. 3. Average N54 HPFP Replacement Cost: $1,000-$1,500. Apr 11, 2022 · I replaced my plugs and coils this weekend for routine maintenance and when doing a data log after just to see how everything was running I noticed that the LPFP is reading 0-1 psi under any circumstance (idle to WOT). Feb 1, 2020 · Some people think FBO N54’s must have a LPFP and turbo inlets/outlets to truly be full bolt-on. 000 km ago and put the old ones which looked the best to another bank (but not remember which bank). Single pumps usually support about 450-550whp on 100% E85 with port injection. I'm pretty sure there is a mechanical relief valve inside that alllows pressure bleed out and return back into the LPFP system. UsuaLly near 14-15 during full throttle. I have replaced the HPFP with a used unit (120k kms) and replaced all 4 O2 sensors, both with no effect. My Hpfp never reads below 5 which is x150 in psi for those who don’t know the readout conversation for the JB4. Dec 15, 2019 · The below N54 datazap log shows a healthy stock LPFP running ~40% E85. Nov 18, 2019 · There are normal fluctuations with pumps, you'll see some run a touch stronger than others. The twin turbo 3. N54 Single Turbo Dyno. I really am wanting a bucketed setup instead of bucketless and saw the stage 3 from fuel it has a bucketed option. I noticed that when it did the hiccup the rail pressure would drop from 800ish psi to like 650 but would then recover. I've heard of mamba, Mr turbo, budler motorsports, excede etc May 4, 2019 · I'm on Walbro 450 and on old fuel filter / pressure regulator I was idling at 72PSI, on new filter I'm idling at 82PSI. Check LPFP connection at pump for corrosion or overheating. I also had issue where my LPFP would fluctuate wildly on full throttle, jumping from 20 to 140PSI! Apr 28, 2015 · Coming back to the fuel pressures at the LPFP and HPFP as a very high level general guideline/rule of thumb, you don't want to see your LPFP dropping into the 40psi range. If the HPFP dies, the car goes into limp mode but can still run off the LPFP. MHD with JB4. May 4, 2019 · I'm on Walbro 450 and on old fuel filter / pressure regulator I was idling at 72PSI, on new filter I'm idling at 82PSI. If the LPFP falters in any way, the HPFP doesn’t see the targeted pressure at its inlet. Nov 11, 2019 · N54 Twin Turbo Dyno. I also had issue where my LPFP would fluctuate wildly on full throttle, jumping from 20 to 140PSI! May 3, 2022 · The car doesn't seem to have any issues other than the lack of rail pressure at WOT on the log and cutting spark when it drops. Fuel-It’s stage 3 kit features dual Walbro 450 or 525 pumps (option to upgrade one or both pumps for $75 each). [It MAY be making noise, but pressure is what counts, and yours is ~ 30% of what LPFP pressure should be. Then there are all the mods in between such as proper suspension, brakes, axles, clutches, LSD’s – the list goes on and on. You can see the power band of the single turbo is shifted right; peak torque occurs right around 5200 rpms while power peaks near redline. When the HPFP starts to fail, it's common for the car to go into limp mode, and in severe cases can leave you stranded waiting for a tow. When running 98RON through the motor at 17 psi, my rail pressure is above 1700, however after mixing in E30/E40 the rail pressure now tanks hard on 19psi. Is that normal? It's not causing any issuesjust wondering if that's normal when running a Walbro 450 pump. If you feel your stock LPFP is worn out and want to make the most of your new fuel system, we’d suggest replacing your stock LPFP as well. N54 Stage 2 Bucketless LPFP. May 9, 2020 · N54 having LPFP spikes over 110psi! 2007 335i e92 Fuel-it stage 3 LPFP 550 cc PI AIC2 Motiv- FF sensor Running e85 In the process of tuning my car, noticed the LPFP pressure was all over the place, dropping below 40 and spikes over 100psi, so I decided to replace the following: HPFP ( FCP lifetime warranty so why not) HPFP sensor LPFP sensor But as soon as I start driving the car and put a load on it. You need to log a proper pull. I do experience stuttering in a sense when accelerating. If you plan on running aggressive E85 mix or custom tune, then go ahead and upgrade the pump. May 10, 2022 · If anyone happens to know how hot an EKPS module gets on a car with no issues after a normal drive, I'd love to know. These kits are available with or without a new stock LPFP. Jul 23, 2019 · Interesting. N54 having LPFP spikes over 110psi! 2007 335i e92 Fuel-it stage 3 LPFP 550 cc PI AIC2 Motiv- FF sensor Running e85 In the process of tuning my car, noticed the LPFP pressure was all over the place, dropping below 40 and spikes over 100psi, so I decided to replace the following: HPFP ( FCP Jan 19, 2020 · You will need a fpr that can handle over 100 psi and set it for 75 psi static pressure when car is not running. Nov 24, 2020 · In the log I posted the LPFP stays pretty evenly around 72 psi until the rail pressure starts to fluctuate. Not sure what else to hit me with some suggestions. But as soon as I start driving the car and put a load on it. Aug 19, 2022 · Made a post before this about the issue, so with a 5 month old FPR, brand new LPFP from fcp euro, new HPFP from fcp euro, non leaky injectors, new injector seals, 6 month old lpfp sensor, and now I swapped my ekpm2 out for a ekpm3 and coded it. The engine otherwise feels fine. It's going to be a one shot deal when I get at it with fuel lines, lpfp, port injection on a phoenix racing manifold with a 15 psi Hobbs switch. I also had issue where my LPFP would fluctuate wildly on full throttle, jumping from 20 to 140PSI! If you are making over 600whp and your LPFP pressures are dropping, this is the solution for you! This is the most powerful LPFP upgrade available and it still utilizes the OEM stock bucket and retains all the factory venturi's and fuel transfer systems in the tank while bypassing all the factory restrictions to maintain higher pressures and greater flows. By adjusting the “gulp” volume, the DME can control the fuel rail pressure (up to 4000psi!). Some of this is wear in, some of it is unit-to-unit inconsistencies. Once in 4th, engine hits major stutters and cannot recover or gain revs until throttle is let off I'm trying to learn what is normal and isn't normal in regards to engine data parameters, so I'm looking for help in interpreting the logs. Also normal and safe above 10 at full throttle. comThis is the low pressure fuel pump i am going to be running initially with the 17t Jan 19, 2020 · You will need a fpr that can handle over 100 psi and set it for 75 psi static pressure when car is not running. If the LPFP dies, the car won't run at all. the LPFP bumps up to around 85psiand stays there until I shut the car off and restart it again. I also had issue where my LPFP would fluctuate wildly on full throttle, jumping from 20 to 140PSI! Sep 30, 2021 · The BMW N54 engine made its debut in the 2007 E90/E92 335i. 800+whp stock N54’s become a matter of when the engine lets go, not if. Stage 4 Walbro dual pump LPFP upgrade kit for BMW N54 and N55 engines from Fuel-It. I also had issue where my LPFP would fluctuate wildly on full throttle, jumping from 20 to 140PSI! Sep 30, 2020 · An HPFP installation problem would not "fix itself" after restart. Feb 6, 2014 · Had similar symptoms, the dealer I went to did the hpfp/injector/lpfp route as well. Mar 31, 2020 · BMW N54 Stage 3 LPFP DIY: Ready For Port Injectionhttps://www. Trade-in: Yesterday I got the 29dc code with low power and half engine light with 2 miles left on my gas range, I instantly got gas and reset the codes and it drove like normal. ) - (PSI, kPA, kPA) Fuel Mode - (Mode) Intake May 3, 2022 · The car doesn't seem to have any issues other than the lack of rail pressure at WOT on the log and cutting spark when it drops. I also had issue where my LPFP would fluctuate wildly on full throttle, jumping from 20 to 140PSI! Mar 8, 2018 · N54 having LPFP spikes over 110psi! 2007 335i e92 Fuel-it stage 3 LPFP 550 cc PI AIC2 Motiv- FF sensor Running e85 In the process of tuning my car, noticed the LPFP pressure was all over the place, dropping below 40 and spikes over 100psi, so I decided to replace the following: HPFP ( FCP But as soon as I start driving the car and put a load on it. LPFP runs steady around 70-72 psi at idle and dips down to low 50s (usually 54-55 psi) very briefly at WOT. High pressure starts at 7, peaks at 15 before dropping to 5 around peak boost. Jan 31, 2019 · One of the most common failures on all BMWs with the N54 (and early N55) engine is the high-pressure fuel pump, regularly referred to as the HPFP. I can hit 23-24 psi in every gear now, where before, I was lucky to hit 20, and 18-19 was more common. Dec 17, 2017 · BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > "Stage 2. Easiest way is to use protools to prime the lpfp to set pressure. But as you would expect given this daisy chained fuel system, the performance of the HPFP is VERY dependent on the performance of the LPFP. Sep 9, 2017 · I have been contacted by a vendor who has some interesting ideas for an alternate pump(s) config for the N54 but that's low priority with all the projects I'm running -again, we are able to hold 3000+ psi to redline with 750+ whp on 100% E85 on the double barrel shotgun, so out of necessity other projects take priority. Both low and high-pressure fuel pumps can only flow so much fuel, limiting power potential regardless of turbo size or other power adders, especially when running an ethanol blend. If you need assistance, email us at info@fuel-it. I noticed that before the pull, the psi was around 72. You could also have a bad HPFP. Even then the lpfp stays on when the HPFP crashes and stays around 85 psi. The LPFP, AKA supply pump, feeds the HPFP with May 4, 2019 · I'm on Walbro 450 and on old fuel filter / pressure regulator I was idling at 72PSI, on new filter I'm idling at 82PSI. Aug 17, 2022 · My lpfp psi drops from the high 60s to the low 30s under WOT. I have a Fuel-It Stage 2 Walbro 450 LPFP installed for the last 3-4 years. I also had issue where my LPFP would fluctuate wildly on full throttle, jumping from 20 to 140PSI! Dec 18, 2023 · The car is a N54 335i, TD03-15T turbo, PR Stage 2 LPFP (retaining venturi). We consider the first option as FBO. LPFP is what primes when you first start the car, that's the whirring noise that can be heard when unlocking the car. I also had issue where my LPFP would fluctuate wildly on full throttle, jumping from 20 to 140PSI! Jan 19, 2020 · You will need a fpr that can handle over 100 psi and set it for 75 psi static pressure when car is not running. All has been May 4, 2019 · I'm on Walbro 450 and on old fuel filter / pressure regulator I was idling at 72PSI, on new filter I'm idling at 82PSI. I've been doing some research but there is so little information available on local guys doing it and actual owners sharing their experiences. Sep 15, 2018 · In the last year or so my LPFP pressures no longer stay at 72psi when cruising or idling. zeroto60. Nov 28, 2015 · i have a bmw 135i N54 DCI bmw performance exhaust and COBB stage1 and i have noticed sometimes after some WOT runs all the way to redline when i come to a complete stop after 10 seconds the HPFP shoots up to 2,200 PSI and sits there and after 10 seconds the injector(s) start to tick louder like its being put under enormous pressure without the Fuel Pressure Low Sensor (psi) <50PSI sustained LPFP (Low Pressure Fuel Pump) is not acceptable - The occasional dip below 50PSI is not usually a cause for concern, it’s a sustained pressure below 50PSI that is typically indicative of a failing LPFP or perhaps a high ethanol content fuel coupled with an aggressive tune, in either case the Apr 28, 2015 · Coming back to the fuel pressures at the LPFP and HPFP as a very high level general guideline/rule of thumb, you don't want to see your LPFP dropping into the 40psi range. com. 5" N54 LPFP On ST 26 PSI! Google Search Jan 19, 2020 · You will need a fpr that can handle over 100 psi and set it for 75 psi static pressure when car is not running. My lpfp is def bad? I do get 29DC - Cylinder injection cutout at WOT and 2A2D - fuel low-pressure system, fuel pressure. BMW E-Chassis Walbro Stage 2 LPFP Upgrade (N54/N55) $ 549. Biggest fueling upgrade with Walbro 450 or 525 pumps. Choose your LPFP Upgrade: We have a few options for you to choose from to meet your needs. The new Walbro 450 pump provides more flow than stock one and this assembly can be purchased one of three ways to meet your needs. I've got 33k miles on my N54. See Below for suggested LOW PRESSURE FUEL PUMP tests. I'm having trouble with n54 not able to meet demands under WOT, especially when shifting from 3rd to 4th. ] Aug 3, 2020 · I logged a pull after my new Stage 2 LPFP install. The hpfp values are at around 640-700 psi at idle and close to wot 2,400ish-2,700sih psi Lpfp 63-69 and stays in the same area idle or wot. 00 – $ 649. By and large they all fall within a fairly tight performance window, but this is one of the reasons why we validate pump assembly performance on every single pump , before anything is Fuel-IT Stage 1 kits are designed to be installed inline with your stock low pressure N54/N55 BMW fuel pump (LPFP). Jul 24, 2017 · 2008 e90 335xi at 67k miles mhd custom flexfuel 24 psi, n20 tmap, fuel-it stg 2 lpfp, cpe charge pipe, helix ic, tial q bov white spring, bms dci, bms t-stat delete, bms high and mishimoto low occ, rb pcv, kw-v1 coilovers, apex arc-8, 235/265 michelin pss, xhp stage 3, scoops, pr ignition May 3, 2022 · The car doesn't seem to have any issues other than the lack of rail pressure at WOT on the log and cutting spark when it drops. Fluctuating inlet pressure to HPFP sounds like LPFP or EKPS issue. May 19, 2023 · BMW N54 HPFP Replacement Cost. If you feel your stock LPFP is worn out and want to make the most of your new fuel system, we'd suggest replacing your stock LPFP as well. 00 LPFP upgrade kit without wiring harness / Do NOT upgrade pump / Include a 4 PSI Hobb's switch - $434. LPFP and inlets/outlets are not as common so most people will say, “FBO E50 tune w/ stage 2 LPFP + inlets/outlets”, or something to that extent. My first old one was terrible and I admit it’s fixed a lot of the issue with new ones. While refurbished N54 high pressure fuel pumps generally cost around $500-$600 from reputable sources like FCPEuro and ECSTuning, new OEM pumps can cost up to $1,100. But after the the, it help right around 85psieven in park, and at idle85psi. Low pressure is fairly steady just below 70psi but does drop to 60psi when I get near peak boost. As I understand it, that pressure SHOULD be steady at 72 PSI, but the HPFP pressure fluctuates. It then made its way into a handful of other models including the 135i, 535i, and Z4. 50s can be ok provided your HPFP is not dropping out. Ive seen logs where people just generally have a weak hpfp and it crashed down to 600-700 sometimes, and ive seen logs where peoples hpfp are fine, they dump in a lot more e85 content than the fuel system can handle, and it crashes down to 600-700 lol Sep 30, 2020 · An HPFP installation problem would not "fix itself" after restart. I see that after throttle release sometimes the Lambda for bank 2 is not going to 234 as much fast as bank1, i have changed the injectors in one bank 5. As far as my observed discrepancy between the actual and control rpms of the LPFP, I am open to the possibility that the control value was entered incorrectly, and my pump is actually turning the correct speed. RPM: Engine speed Boost: This is the pressure, in PSI, in the charge pipe just before the throttle valve. Jan 19, 2020 · You will need a fpr that can handle over 100 psi and set it for 75 psi static pressure when car is not running. ] My LPFP is loud and clear when it engages. 00 LPFP upgrade kit without wiring harness / Do NOT upgrade pump / Include a 15 PSI Hobb's switch - $434. Jan 27, 2020 · Push an N54 over 700whp and the possibility of a blown motor becomes significant. Checked fuse, swapped relay. Jul 26, 2021 · 1. Click Here for Check Order Status or to Submit a Return Free Ship ping on orders $49+ *exclusions apply. Sep 30, 2020 · An HPFP installation problem would not "fix itself" after restart. Lpfp readings never drop below 63 usually hanging in the 70+ range. BMW has had multiple recalls for this HPFP on the N54. When upgrading your turbos or increasing your BMW's power potential, it's important not to overlook your fuel pump. Theoretically, the LPFP performance is going to have an effect on the high pressure pump,so it's possible, depends on what codes set in the car and what the test they run on it show. It is an easy DYI project and doesn't cost much to replace. This is a complete Low-Pressure Fuel Pump (LPFP) upgrade that replaces your stock LPFP assembly with a new E85-certified one. Apr 28, 2015 · Coming back to the fuel pressures at the LPFP and HPFP as a very high level general guideline/rule of thumb, you don't want to see your LPFP dropping into the 40psi range. This is a complete Low-Pressure Fuel Pump (LPFP) upgrade that replaces your stock LPFP assembly with a new E85 certified one. Your HPFP looks fine to me, the LPFP should keep around 70 psi and not fall below 50 psi. May 3, 2022 · The car doesn't seem to have any issues other than the lack of rail pressure at WOT on the log and cutting spark when it drops. However I still sometimes can get a solid pull in but mostly it’ll dips super low and my car goes in limp mode. 00 LPFP upgrade kit without wiring harness / Upgrade to Walbro 525 pump / Do NOT add a Idle pressure is around 700 psi. No issues with straight pump e10 but that’s not what I run. jiat fds vebekrji pzievmf xzgd boio erfi nnxlh jwdzz dowac