Fuel Pressure Regulator - Aftermarket For Oem Rail

[Ralph Wiggum]

^ and I spose you've never called anybody "skip"....?

[ChrisJager123]

Where do you order this part?? as that site costs over 50 bucks for postage??

[IH8TOADS]

KPM apparently have a drop in style replacement reg with their fuel pump kits. Haven't seen it myself but you could try it. Just another note: this isn't a necessity and I'd say 99% of tuners just 'tune' elevated pressures at low injector pulsewidths.

[Weaponxr]

I dont mean to bring up an old thread but I have an issue with starting the car in hot weather and thought one of these regulators may help my issue. The setup I have is an intank Walbro pump, a PW surge tank with 1 044 pump, and ID725cc injectors. The system also has a check valve to keep pressure up between starts.

My main issue is that when the weather is cold the car starts and fires up straight away but when its hot weather it will crank and slowly sputter into life leaving fuel smelling smoke out the exhaust. Its like its getting too much fuel. Since the return system hasnt been changed in anyway im thinking that one of these high flow fuel regulators would help the situation??

This issue can get very annoying in summer.

[IH8TOADS]

Has this problem developed over time or was there since the tune and hardware mods?

Have you got an AFR meter in the car by any chance? I have seen a familiar issue before but you need some more info first.

I would datalog LTFT, STFT at idle during a hot start and see what values it returns.

[RAP1D]

Good find mate, I think alot of cars here could have a bigger flowing rail... Turbosmart do an adapter to fit their 1200 reg on

[Weaponxr]

Has this problem developed over time or was there since the tune and hardware mods?

Have you got an AFR meter in the car by any chance? I have seen a familiar issue before but you need some more info first.

I would datalog LTFT, STFT at idle during a hot start and see what values it returns.

Its been like that since I had the mods done to it. I dont have an AFR meter in the car, im not a gauge kind of person.

The tuner has had a look at it but its hard to diagnose when the car is at the shop only on cooler days.

To me it seems like its overfuelling somewhere during starting as it stinks of fuel and blow some smoke out the exhaust (only on hot days)

[welshy_89]

Rapid are you talking about the aeroflow fuel reg by pass?

[IH8TOADS]

The turbosmart adaptor doesn't flow that much though....no point running bigger than a FPR800 with the adaptor. I experimented with one in mine and it was no benefit and stuck out like a sore thumb. Wiggum ended up modding it though and made it super high flowing.....he can explain what he did!

These cars have warm and cold start modes....and probably a few things we can't access with the current software. In some cases where the car is mis-behaving for an un-diagnosable reason I simply force a cold start 100% of the time. BUT get your xcal and datalog LTFT and STFT during a hot start. You can do this yourself...PM me if you need help and you can then supply the data to your tuner which may help in the diagnosis.

[Weaponxr]

Thanks for that, I will try it when we get another hot day and see if I can manage it.