Random Starting Problem

If I were you I'll 1st check the fuel pressure with a fuel pressure gauge not the eyeball or thumb method. EFI don't like incorrect pressure/s Low fuel pressure will cause your problem.

Fuel pressure checked out ok. Has a new ecm in it now. And the dealer checled the fuel injectors and said they're good

To catch this problem -you have to duplicate it-then when it refuses to start immediately look for spark and fuel.

How exactly should I do this?

[quote:1f674e8d16="vettebyrd"]How exactly should I do this?[/quote:1f674e8d16]

When it refuses to start-disconnect a plug wire and ground it to the engine-then crank the engine over-do you have spark. You need a helper to do this.

Do you mean just pull a plug wire out one at a time and see if it sparks when you try to start it? Do I just do this with each plug wire one at a time?

[quote:ec174b48cd="vettebyrd"]Do you mean just pull a plug wire out one at a time and see if it sparks when you try to start it? Do I just do this with each plug wire one at a time?[/quote:ec174b48cd]

Get half of them-If you got spark, check for fuel

[quote:6030ed93de="vettebyrd"]I have a 1988 Corvette which I was having an intermitten code but the light wouldnt stay on long enough to find out what the problem was with a scanner. But it did have a history of a bad maf. So since then Ive replace the Maf sensor and both maf relays. I havent driven the car much but I havent had the light come on since. My main problem with the car is at completely random times I'll have a start-up problem-sometimes it'll crank for a long time before it starts while at other times it'll start right up. Also A few days ago I noticed that that engine is missing. I just checked all the spark plugs and the plug wires and they check out ok. Help needed to get my baby back on the road asap and would be greatly appreciated![/quote:6030ed93de]


did you check the coil?
i had a similiar problem with my 88.
i replaced the coil, problem solved.