new better fuel pump now starting issues...HELP!!!

[custom e30]

i have a 1988 bmw 325i convertible, i turbocharged it, it only has the 19lb injectors in it so im not running anymore then 7psi at the moment, so just to add a extra free upgrade to my car i figured i would put a new tre performance 340 255 fuel pump in my car,
my prob is that now it take alot of cranking and gas pedal play to get it to fire up, i dont see why a 100psi fuel pump with cause the car to not wanna start so im just curios to know if anyone has any clues on this issue,

help is appreciated, thanks

[custom e30]

wow no help

[Farbin Kaiber]

wow no help

rrfpr.

[custom e30]

hmmmmmm....

[Kershaw]

:rofl:

if you put the old fuel pump back in, does it start fast again?

[Farbin Kaiber]

Did you replace the fuel filter when you installed a new pump?

[custom e30]

idk if it will start fast again or not if i put the old one in, and i replace the fuel filter 6 months ago

[redsubdivisions]

lmao Farbin.

Check the fuel pump sock. If you didn't replace that, chances are its that.

[Gary Horneck]

I have the same fuel pump and the same cranking issues. All the pressure leaves the fuel rail after a couple hours, and it takes some cranking to get pressure back. I have an adjustable fpr with gage, so after it re-pressurizes, its fine.

[custom e30]

see that confuses me, the new fuel pump should add more pressure. faster?

[Farbin Kaiber]

Do you know the difference between dead-head and return systems?

[jlevie]

If the new pump doesn't have a check valve or if the FPR or injectors are leaking the fuel rail will lose pressure when the engine is off. With a good OE pump the rail should see normal pressure in just a few turns of the engine, even if the rail pressure starts at zero. But if the injectors are leaking, you'd still be faced with flooded engine and a good number of turns of th engine would be required to clear the engine.


The pump you fitted may have higher pressure, but a lower flow rate and might be missing the check valve. Replace that trash with a new OE pump. And make sure that the FPR and injectors aren't leaking.

[custom e30]

got yea

[custom e30]

just ordered jdm fpr, the hunt continues tomorrow for the 30lb injectors at the jyard, anyone got any ideas on what vehicles will have them???

[u3b3rg33k]

see that confuses me, the new fuel pump should add more pressure. faster?

who the fuck post this?
and this:

just ordered jdm fpr