Intermittent no start condition

Steve Williams · 09-16-2013, 11:17 PM

You mentioned fuel pressure....Does it give you 45psi when it cranks? Does it fall off? To bleed off that quickly upon shut off doesn't seem right to me. You also need to have 40psi minimum with the engine running to effectively fire the injector. Less than that and it can create problems. If we can get Ed Wright to chime in, he has a good deal of knowledge on these engines. Much more than me I suspect. One thing I failed to mention in my last post, is to check your grounds and wiring going to and from your crank trigger/ICM and coil, to include the weather connectors. If there is problems in either of these two circuits of wiring (bad ground or short while cranking), it can create a problem in having enough voltage to fire the engine off or a weak signal. I fought this condition for three weeks before stumbling across my problem.

09-16-2013, 11:17 PM	#11
Steve Williams Member Join Date: Aug 2007 Location: Detroit, Michigan Posts: 352 Likes: 0 Liked 1 Time in 1 Post	Re: Intermittent no start condition You mentioned fuel pressure....Does it give you 45psi when it cranks? Does it fall off? To bleed off that quickly upon shut off doesn't seem right to me. You also need to have 40psi minimum with the engine running to effectively fire the injector. Less than that and it can create problems. If we can get Ed Wright to chime in, he has a good deal of knowledge on these engines. Much more than me I suspect. One thing I failed to mention in my last post, is to check your grounds and wiring going to and from your crank trigger/ICM and coil, to include the weather connectors. If there is problems in either of these two circuits of wiring (bad ground or short while cranking), it can create a problem in having enough voltage to fire the engine off or a weak signal. I fought this condition for three weeks before stumbling across my problem.