Help me!! Help me!! PLEASE!!!!
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
The ECM will set error code 24 if it doesn't see the VSS signal. It will turn on the SES lamp after driving about a mile (it takes the ECM a while to figure out the car is moving but the VSS signal is not there).
Burning Brakes
Joined: Nov 2004
Posts: 897
Likes: 12
From: Land of Whiskey Rebels, PA
My thought was the Fuel Pressure Regulator (FPR), but, not the injectors. I think you hit on it. I would suggest that, while you have pressure off the system, you replace the o-rings and hoses with ethanol-proof ones. You have to take the plenum off anyway, so, it's one of the "might as well" things.
Here's a list of them:
Check the "sock" on the fuel pump. If it's brittle or cracked, replace it.
Replace the hoses from the fuel pump to the lines.
Replace the fuel filter.
Replace the diaphragm in the FPR.
Replace the o-rings in the tubes feeding the fuel rails.
And, you might as well replace/upgrade the injectors.
Go to fuelinjectorconnection.com. You can get a set of injectors AND the o-rings AND a set of intake gaskets for about $200. The best 200 bucks I spent.
PS--Happy Thanksgiving!
Here's a list of them:
Check the "sock" on the fuel pump. If it's brittle or cracked, replace it.
Replace the hoses from the fuel pump to the lines.
Replace the fuel filter.
Replace the diaphragm in the FPR.
Replace the o-rings in the tubes feeding the fuel rails.
And, you might as well replace/upgrade the injectors.
Go to fuelinjectorconnection.com. You can get a set of injectors AND the o-rings AND a set of intake gaskets for about $200. The best 200 bucks I spent.
PS--Happy Thanksgiving!
Thread Starter
Instructor
Joined: Aug 2009
Posts: 157
Likes: 4
From: Golfport Mississippi
My thought was the Fuel Pressure Regulator (FPR), but, not the injectors. I think you hit on it. I would suggest that, while you have pressure off the system, you replace the o-rings and hoses with ethanol-proof ones. You have to take the plenum off anyway, so, it's one of the "might as well" things.
Here's a list of them:
Check the "sock" on the fuel pump. If it's brittle or cracked, replace it.
Replace the hoses from the fuel pump to the lines.
Replace the fuel filter.
Replace the diaphragm in the FPR.
Replace the o-rings in the tubes feeding the fuel rails.
And, you might as well replace/upgrade the injectors.
Go to fuelinjectorconnection.com. You can get a set of injectors AND the o-rings AND a set of intake gaskets for about $200. The best 200 bucks I spent.
PS--Happy Thanksgiving!
Here's a list of them:
Check the "sock" on the fuel pump. If it's brittle or cracked, replace it.
Replace the hoses from the fuel pump to the lines.
Replace the fuel filter.
Replace the diaphragm in the FPR.
Replace the o-rings in the tubes feeding the fuel rails.
And, you might as well replace/upgrade the injectors.
Go to fuelinjectorconnection.com. You can get a set of injectors AND the o-rings AND a set of intake gaskets for about $200. The best 200 bucks I spent.
PS--Happy Thanksgiving!
I have put new fuel pump, sock, filter. Injectors have been in forever. Mechanic did test on them some years ago and said two or three of them were leaking (or whatever the proper terminology is) so I think we will have all of that replaced. I want to get this thing running right so I can get rid of it. I don't think I can sell something that isn't running properly.
Thanks for your input.
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
Since the car runs ok and no check engine light I suspect the cause of the loss of fuel pressure relates to check valve in fuel pump. If the pulsator was re-used when fuel pump was replaced it could be cause and couple clamps and a short piece of hose is all thats needed to correct. Pulsator was there to quiet fuel pump noise, it is unnecessary and should not be re-used. Unless you develope a hard start/ extended crank condition I wouldn't worry with it.
IAC counts vs RPM would vary from car to car and engine to engine no different than Min Air Rate. With a tech 1 in override it should show you. The 88-93 60 degree V6 when performing Idle Learn tech 1 would display IAC and RPM.
IAC counts vs RPM would vary from car to car and engine to engine no different than Min Air Rate. With a tech 1 in override it should show you. The 88-93 60 degree V6 when performing Idle Learn tech 1 would display IAC and RPM.
Thread Starter
Instructor
Joined: Aug 2009
Posts: 157
Likes: 4
From: Golfport Mississippi
Sorry for the quality of the photo. This saga keeps going on and on and on...Found out why I was losing fuel pressure. Smelled the gas so I went looking. Where the pencil is pointing, found puddle of fuel. Assume it is either leaking around the injector or fuel rail. might explain the source of my problems. Don't know anything about all of that so I will have to take it to a mechanic shop. Will be after the holidays. It will have to sit for awhile. Appreciate all the help. Great people on this forum. You are the best!! Will have to drive the C5 for awhile.
Safety Car
Joined: Jan 2008
Posts: 3,939
Likes: 1
From: Vero Beach Florida
Check the vac line on your FPR to see if there is gas in it. With any gas leak don't drive or start the car you will fill the crankcase with fuel or run the risk of starting it on fire.
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Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Screwed up again! I was wondering why the oil filler cap was on the wrong side. I was the one on the wrong side.
I looked at my car and I don't see anything obvious in that area that would cause fuel to pool there. It's might be leaking somewhere else and flowing along the fuel rail and dripping there. The only thing I saw nearby was the #4 fuel injector. You might have a leak at the top or bottom O-rings for the injector.
I took my injectors out for cleaning and broke one of the retainer clips so I left it off. I figured the injectors can't go anywhere so I didn't think I needed it. The injector did leak at the top. After I put in a new retainer clip it stopped leaking. When the fuel rail was bolted down the injector could be moved up and down about 1/8". Apparently the fuel pressure pushed it out far enough for it to leak. I have heard that those clips are not needed and are only there to ease installation at the factory. My experience says otherwise.
The fuel pressure regulator is fairly far away, so that's probably not it. You can check it by taking off the vacuum line while the engine is running and see if fuel comes out.
I looked at my car and I don't see anything obvious in that area that would cause fuel to pool there. It's might be leaking somewhere else and flowing along the fuel rail and dripping there. The only thing I saw nearby was the #4 fuel injector. You might have a leak at the top or bottom O-rings for the injector.
I took my injectors out for cleaning and broke one of the retainer clips so I left it off. I figured the injectors can't go anywhere so I didn't think I needed it. The injector did leak at the top. After I put in a new retainer clip it stopped leaking. When the fuel rail was bolted down the injector could be moved up and down about 1/8". Apparently the fuel pressure pushed it out far enough for it to leak. I have heard that those clips are not needed and are only there to ease installation at the factory. My experience says otherwise.
The fuel pressure regulator is fairly far away, so that's probably not it. You can check it by taking off the vacuum line while the engine is running and see if fuel comes out.
Last edited by Cliff Harris; Nov 28, 2013 at 11:44 PM.