car still won't start!
Thread Starter
Safety Car
Joined: Feb 2003
Posts: 3,849
Likes: 95
From: Springfield MO
car still won't start!
Ok it must be some kind of short somewhere. All the car does is crank but doesn't start. I have good spark as well as fuel but still i get only a crank. But the weird thing is that i went out and unplugged the vaccum line to FPR and the thing started right up and ran great (except for a little hesitation). Turned it off then reconnected the vaccum line and it still started. WTF.. After i let it set for a while then it only cranks. Any ideas? are there any sensors that will cause this to happen?
Pro
Joined: Jul 2002
Posts: 729
Likes: 4
From: Yukon OK
Re: car still won't start! (JJ 86)
How's the fuel pressure at the rail?
Can you hear/feel the injectors clicking when you crank? You can make a test light out of a small 12v lamp and check the injector pulse from the ECM.
If you have spark and think it's in time then focus on the fuel system.
Can you hear/feel the injectors clicking when you crank? You can make a test light out of a small 12v lamp and check the injector pulse from the ECM.
If you have spark and think it's in time then focus on the fuel system.
Melting Slicks
Joined: Feb 2003
Posts: 2,770
Likes: 0
From: Construction Sucks! MI
Cruise-In V Veteran
St. Jude Contributor '03 & '05
Re: car still won't start! (LaVidaLoca)
i'm having the same problem. not to hijack your post, but i here a sparatic clicking near the fuel rails, when the ignition is in the on position. what does this mean?
JJ, is your fan running when it is in the on position? mine is and i can't pull codes.
JJ, is your fan running when it is in the on position? mine is and i can't pull codes.
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
Re: car still won't start! (JJ 86)
You can't fool the laws of Physics. When it won't start, your engine isn't getting some combination of spark, fuel , air. Put a fuel pressure gauge on the shrader valve on the fuel rail and see what it reads when it won't start. With no vacuum line on the FPR, fuel pressure is maximum, maybe the FPR is defective and shuts off the fuel with a vacuum after it sits overnight. The fuel pressure gauge will show this.
