another fuel pressure question

dw89lx

New Member

May 7, 2005

44

0

0

Boston, MA

Jul 15, 2005

#1

• Jul 15, 2005

• #1

I 've noticed that if I let my car sit overnight or at work the fuel pressure drops really low, like 10 to 20 psi. Is this normal or do I have a problem? I usually have a hard time keeping the car idling in the morning until it gets warmed up and thought that this could possibly be part of my problem.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

Jul 15, 2005

#2

• Jul 15, 2005

• #2

How is pressure when it idles poorly?

It can be quite normal for pressure to bleed off over time, esp with aftermarket FPR's. But once you are running, you should not see below 30 PSI.

Do you have to prime the pump more than once to get the car to start (or does it require extended cranking to catch?)?

Good luck.

 

dw89lx

New Member

May 7, 2005

44

0

0

Boston, MA

Jul 15, 2005

#3

• Jul 15, 2005

• #3

The pressure is set to 42psi and it stays there as long as the engine is running even when it's idling poorly. It only drops with the engine is off for a few hours.
I just wanted to make sure that it was normal.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

Jul 15, 2005

#4

• Jul 15, 2005

• #4

Yeah, totally normal IMHO. The poor idle is a separate issue. It sounds like you have mods since you have the FP set higher than stock. If wanting opinions on what to try (other than cleaning the IAC) with the idle issues, post sig info.

Good luck bud.