oil Change Question
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
Likes: 71
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Re: oil Change Question (YellowC4)
Sounds like you've got an injector leaking badly when the engine's shut off.
Drifting
Joined: Jul 2002
Posts: 1,273
Likes: 0
From: Olathe, KS USA
Re: oil Change Question (Corvette Kid NC)
Sounds like you've got an injector leaking badly when the engine's shut off.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Re: oil Change Question (YellowC4)
what's the best way to check for a leaking injector
If there's an easier way, I'd sure like to know about it for the future.
Jake
Burning Brakes
Joined: Jan 2004
Posts: 933
Likes: 0
From: Inland Empire CA
Re: oil Change Question (YellowC4)
Correct me if I'm wrong. But I'd say just hook up a fuel pressure gauge to the Schrader valve (small bicycle type valve with a plastic cap on it on the fuel rail). Then get in the car and pressurize the fuel system by turning key to "ON" not "START". You should hear the fuel pump pressurize the system. Turn the car off.
Record the gauge reading at that time. Come back in a few hours and see if it has changed. If the fuel pressure has dropped considerably then you most like have a leaky injector. This is not 100% true as faulty regulator could cause a fuel pressure drop as well.
I think another method is to simply pull the rail and pressurize the fuel system with the injectors attached to see which ones leak or don't leak. I've never done this though.
Record the gauge reading at that time. Come back in a few hours and see if it has changed. If the fuel pressure has dropped considerably then you most like have a leaky injector. This is not 100% true as faulty regulator could cause a fuel pressure drop as well.
I think another method is to simply pull the rail and pressurize the fuel system with the injectors attached to see which ones leak or don't leak. I've never done this though.
Drifting
Joined: Jul 2002
Posts: 1,273
Likes: 0
From: Olathe, KS USA
Re: oil Change Question (YellowC4)
Get a fuel pressure gage and attach it to the valve on the fuel rail, turn on the car but don't start it then turn it off, the pressure (around 40psi) should stay up for a couple hours. If it drops off quickly it could be the Injectors, the Regulator or the Check Valve at the pump. Good Luck..
Team Owner
Joined: Apr 2001
Posts: 22,267
Likes: 3
From: Dallas TX
Re: oil Change Question (C4Crazy787)
I helped a buddy troubleshoot a cutlass once with the same problem. Turns out the ECM was bad and it was dumping fuel in the cylinders. Goes right past the rings and into the pan.... oil was like water :eek: .... not good. Get that taken care of fast! Don't want your oil to lose it's lubricating abilites.
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Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
Re: oil Change Question (WickedC4)
[QUOTE]Correct me if I'm wrong. But I'd say just hook up a fuel pressure gauge to the Schrader valve (small bicycle type valve with a plastic cap on it on the fuel rail). Then get in the car and pressurize the fuel system by turning key to "ON" not "START". You should hear the fuel pump pressurize the system. Turn the car off.
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Then pinch off the return and outbound rubber fuel lines located on top of the fueltank (under the rubber bladder). If the pressure still falls off, most probably leaky injectors. Also check the vacuum line from the FPR for fuel. It should be dry.
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Then pinch off the return and outbound rubber fuel lines located on top of the fueltank (under the rubber bladder). If the pressure still falls off, most probably leaky injectors. Also check the vacuum line from the FPR for fuel. It should be dry.
Le Mans Master
Joined: Aug 2003
Posts: 9,884
Likes: 3
From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Re: oil Change Question (C4Crazy787)
Get a fuel pressure gage and attach it to the valve on the fuel rail, turn on the car but don't start it then turn it off, the pressure (around 40psi) should stay up for a couple hours. If it drops off quickly it could be the Injectors, the Regulator or the Check Valve at the pump. Good Luck..
Thread Starter
Instructor
Joined: Jul 2001
Posts: 243
Likes: 0
From: Miami Fl
Re: oil Change Question
I just finished checking my injectors and they look fine there not leaking I checked them with the fuel pressure gage and I took them out and turned on the car no leaks but I noticed that I have oil in the back and front of the intake ???
thanks
thanks