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Old Feb 18, 2008 | 05:13 PM
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Exclamation quick question
How could one have low pressure at fuel rail with 2 brand new regulators and have a super rich running engine. Have ten pound pressure and it held the 10 pounds overnight.
 
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Old Feb 18, 2008 | 05:24 PM
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What's the pressure at idle and wot? 36-41 is the target I believe for the V8s.

Leaking fuel injector maybe? Although then it would lose pressure overnight.
 
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Old Feb 19, 2008 | 06:33 AM
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Thats what i had thought too. Is there some form of filter or screen in the line between fuel filter and regulator?
 
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Old Feb 19, 2008 | 10:30 AM
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all the injectors have a small screen on them.
 
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Old Feb 20, 2008 | 08:12 AM
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but nothing in the line correct?
 
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Old Feb 20, 2008 | 08:31 AM
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That's bizzare. What happens if you disconnect all the electrical connections on the injectors and prime the fuel pump? Does it build more pressure?
 
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Old Feb 20, 2008 | 08:48 AM
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super rich running? maybe bad O2 sensor? or bad watertemp sensor? or another sensor that regulates the mixture?
 
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Old Feb 20, 2008 | 09:02 AM
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it sound to me like you have an injector that is only able to hold 10Psi. and is bleeding down to that point. this would cause your low pressure and your rich condition.
 
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Old Feb 20, 2008 | 09:15 AM
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i am not getting anything for fuel to fuel rail. i changed out the pump but now get a code 87. i am beginning to think i have a bad fuel filter even though its new. i had 50 pounds at the outlet of frame pump before i changed it. but nothing at rail. regulator is new also, i guess its time to put old parts back on
 
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Old Feb 20, 2008 | 12:19 PM
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well found one problem with the eec relay, p.o. rigged one of the wires, wouldnt let pumps kick on, i got bout 28 psi now goin to put old filter back on maybe i got a bad one
 
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