Well I just finished putting an 88 305 into my iroc. Well the problem is it will start but only run for a few seconds then quit. The fuel pump runs abnormally long but it has good pressure, I checked it with a gauge. Spark is good, I used a spark tester and a timing light. The motor is in time.

So I figure the problem lies in the fuel system. Tomorrow I'm replacing the fuel filter because I don't know when it was last changed. I think it's plugged and causing it to run longer than I've heard it do before. Other than that I'm unsure of what to do. Any ideas?

 

while you are cranking does the gauge stay around 40 psi. put a noid light on the injectors and see if you are getting signal.

It sounds like VATS to me

 

The pressure was at 45 psi. I don't think my car has vats. Its an 85.

 

sorry use the noid light it is cheap and check the injector pulse

 

well i replaced the fuel filter and that made no difference. What would cause the injectors not to fire? If remove all the injectors besides the cold start one it runs the same as if I had left them all on. But unplug the cold start and theres nothing.

 

ignition module

 

What would make you think that?

 

Look for vacuum leaks, like the break booster vacuum would cause that to happen.

 

how do i check the ecm to make sure its good?

 

Well today I pulled up the fuel rail and the injectors weren't spraying, only the cold start. So I switched the connecter from the cold-start to another injector turned the engine over and that injector sprayed. Why aren't the injectors getting the signal to fire?

 

dude have you built 5 of these cars. good then do not question good advise when you get it. take the ignition module out and have it tested at autozone or a similar place. the ignition module recieves the signal to fire the injectors.

I hate wasting my time.

you did not have to pull the fuel rail all you had to to is get a noid light and see if you were getting the signal to the injectors. then you find out if the ignition coil is ok then you find out if the pickup coil has the proper resistance and then you check the voltage at the computer that initially fires the injectors then you start to think about a computer.

You wasted your weekend because you think you know better than people who could put your car together if you took it all apart and made a big pile of parts.

Next time buy the helms manual(that is the dealership service manual) and go through the diagnostic test before asking us to help you when all you want to do is figure it out yourself.

 

I apppolgize for offending you but you only stated "ignition module" and I didn't know it recieves the signal to fire the injectors. But thanks anyway I'll be sure to do that.

 

its probably not all your fault I spent 4 years on my last build and I just smoked the cam.

I have issues!!!

 

Are there any trouble codes? Try changing your MAF burnoff relay. Sounds like what mine was doing. autozone and advance dont have it in their catalog but if you go there ask for the MR22 relay from GP Sorensen

 

Well I went to advance and autozone to have it tested. The first time at advance it failed the low rpm part but he tested it again a few times and it passed everytime. And at autozone it was tested like 8 times and passed each time.

 

So at the same time I converted my to a small cap hei. But I connected the wiring with the new pigtail right. I think. Both connecters were labled ABCD and I matched up the letters and soldered the wires together. So would that make a difference.

 

I think you may be coming up with your own solutions. You need to look at what those wires do.

 

purple/white is the refrence one i guess. I found it at chevythunder.com. Ill be checking it out tomorrow.

 

oil preasure sensor will not aloow the injectors to fire either, if it senses low oil preasure or is shot.Check that aswell.

 

Also Check the INJ fuses under the dash. make sure they are both good.

 

Well it started. It seems I wired it wrong on the 4 pin connector on the distributor. Thanks a bunch guys for the help.

 

that is exsactly what we are all supposed to be doing here.

Helping one another to think through problems and come up with solutions based on past experience or in this case having someone remember past steps that may have caused a problem.

 

Well I'd just like to update. I forgot to put new grease on the ignition module and cooked that. But I replaced it and its running good.