Starting
Thread Starter
Racer
Joined: Jan 2006
Posts: 393
Likes: 0
From: Palm Springs CA
Starting
My 1995 A4 starts hard, after it is warm and I start it, it fires as I turn the key. My engine is has about 5K miles since re-build, I think its a fuel issue, ( filter, line pressure ). I do not want to have someone look at it as the mere sight of the car you see the dollar sign look in there eyes. Any thoughts, tests.
N7
N7
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
The filter is cheap but the work changing it is a little stressful . First use a fuel pressure guage to check your fuel pressure,should read between 41-47 psi. That should give you an idea if the filter is clogged or if the pump is failing or if you have a leaking injector.
Thread Starter
Racer
Joined: Jan 2006
Posts: 393
Likes: 0
From: Palm Springs CA
Originally Posted by RRT vette
The filter is cheap but the work changing it is a little stressful . First use a fuel pressure guage to check your fuel pressure,should read between 41-47 psi. That should give you an idea if the filter is clogged or if the pump is failing or if you have a leaking injector.
TKS
N7
Thread Starter
Racer
Joined: Jan 2006
Posts: 393
Likes: 0
From: Palm Springs CA
Originally Posted by redwing76
Mine started hard took a long time to fire. Try pressing the throttle all the way down when you crank the if it starts faster look for leaking injector.
N7
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Originally Posted by Normseven
I have looked at a Haynes on changing the filter, I do not think the pump is failing as it has done this since sept 05 when I picked it up, but not ruling it out, where and how do I check the pressure.
TKS
N7
TKS
N7
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Thread Starter
Racer
Joined: Jan 2006
Posts: 393
Likes: 0
From: Palm Springs CA
Originally Posted by RRT vette
First remove the fuel pump fuse and crank engine to remove pressure from system. Then reinstall fuse and take the fuel rail covers off and look for the fuel pressure valve. Use a fuel pressure guage (can be bought at just about any autoparts store) and screw it on to the fuel rail. Turn key on and note pressure (41-47 psi), crank car and pressure should drop 3-10 psi and hold steady while running.
N7
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Originally Posted by Normseven
Looks like I will need a fuel pressure gauge, any perticular type? Is the rail, valve one in the same. How did you become a senior member already?
N7
N7
Thread Starter
Racer
Joined: Jan 2006
Posts: 393
Likes: 0
From: Palm Springs CA
Originally Posted by RRT vette
Yeah, just about any guage will do as long as it reads 0-100 psi on it. They usually cost about $40-$50, but make sure it will fit this valve and I think it is a AN4 fitting. The Schrader valve on my 86 is on the passenger side fuel rail. I haven't had to check the fuel pressure on my 95 before, but it should be in about the same place. The black fuel rail covers are not hard to remove. The Haynes manual has this information but you could get a lot more from a Factory Service Manual. I have spend many hours on this site since I joined. I work 12 hr shifts and have access to the internet as well as at home. I have learned a lot in a short period of time on here. I have owned four different C4 for about 8 years now and actually rebuilt the 86 from just about the frame up. I think once I hit 100 total posts I became a senior member. The stars count for how many post you have made.
Tks,
N7