Ok bad news, was not fuel pump, everytime he tapped on the ecm started running right did it both with new ecm and old one, did the same thing, but I found a vaccum leak and it was to the a/c dont know if that's the problem, but it runs fine when you tap on ecm but we checked wires already it so wierd starting to get mad a aggravated and sad at the same time :,(

Clean off all the contacts in the connectors to the ECM. You must have some corrosion in there.

quote Originally posted by Mentor_Cards13: Ok bad news, was not fuel pump, everytime he tapped on the ecm started running right did it both with new ecm and old one, did the same thing, but I found a vaccum leak and it was to the a/c dont know if that's the problem, but it runs fine when you tap on ecm but we checked wires already it so wierd starting to get mad a aggravated and sad at the same time :,(

I don't know if you read my thread but my symptoms started after the shop was fixing my A/C. So I guess that is worth checking. But I don't see any vacuum to my A/C. It's only a compressor that's running from the water pump belt and the rest is electric - no vacuum whatsoever. Maybe it's different on the 1987? Mine is a 1985.

Also I disconnected all the electric cables from the compressor and the belt itself and it didn't help.

Can you specify where have you found the vacuum leak?

[This message has been edited by cebix (edited 10-21-2013).]

It's right by the alternator

What did you actually replace? I don't see any vacuum hoses by the alternator on my car.

Probably because you're model is different my alternator is in the rear left side of the engine by the tail lights where is yours?

quote Originally posted by Mentor_Cards13: Probably because you're model is different my alternator is in the rear left side of the engine by the tail lights where is yours?

can we get a picture of that?

Ill post it tomorrow you can see it in the YouTube video but its on the left back side of the engine

That's the cruise control vacuum diaphragm. It could be the cause of your bad idle.

Edit: Does your cruise control work?

[This message has been edited by Gall757 (edited 10-22-2013).]

No my cruise control doesn't work at thought about it too

The cruise control is hooked up to the vacuum system. You need to find the line that goes from the engine to the cruise control, disconnect it and cap it. See if your idle improves.

[This message has been edited by Gall757 (edited 10-22-2013).]

Will do keep you updated

We'll, we actually found the problem, it was a bad fuel injector lol the most obvious thing was staring us right in the face, it works great now, I feel so stupid haha

What are the prices of those? Didn't you say in the first post that you replaced the injector? Is there a way to check the injector or did you just straight replaced it?

[This message has been edited by cebix (edited 10-25-2013).]

I did but it was defective and we had it in partially and they go around $130.00 but it runs great now should not have any problems for a while lol

130 bucks seems a bit high. You replaced just the injector or the whole throttle body?

Just Injector if it's put in wrong or not all the way in or defective it will act up badly