fuel pressure reg ??
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Usually down. Pull the vacuum line off the FPR and look inside. There should be no signs of gas.
There are a few things that can make it run rich.
Extra fuel enrichment can only come from a few possible sources:
There are a few things that can make it run rich.
Extra fuel enrichment can only come from a few possible sources:
Originally Posted by tequilaboy
1 leaky or shorted injector
2 leaky fuel pressure regulator
3 leaky or shorted CSI
4 Bad coolant temp sensor (rich in open loop)
5 Bad tps (premature PE)
6 Bad MAF or MAF calibration (increased load -> increased fuel)
7 Excessive fuel pressure
8 Excess air in exhaust (causing lean O2 readings in closed loop)
2 leaky fuel pressure regulator
3 leaky or shorted CSI
4 Bad coolant temp sensor (rich in open loop)
5 Bad tps (premature PE)
6 Bad MAF or MAF calibration (increased load -> increased fuel)
7 Excessive fuel pressure
8 Excess air in exhaust (causing lean O2 readings in closed loop)
