my problem is spark! i have fuel i took a fuel line off and it squirted out i have air i took the air box and hose off and tried starting it i have pressure cuz my pressure guage goes up when i try starting it. i sprayed cleaner directly into the intake and no fire so it HAs to be spark my fuel pump make the nice humming sound when i turn it on
is there a sensor that keeps it from sparking and combustin in the combustion chamber?

i took off a spark plug that goes into the combusion chamber and it sparked when i grounded it out

 

You may have fried your O2 sensor by squirting cleaner down the bore, not to mention f-ing up your TPS sensor too. Just because you have fuel pressure doesn't mean it will start, theres a lot more to it. That line of thinking works on a carb, but not a computer run EFI motor. Are you throwing any codes? Have you looked at the "no start" threads yet?

Main culprit of a no-spark is the CPS sensor. but you already said you have spark, so its most likely a fuel issue.

 

change your map sensor its the one on the firewall i had to change mine about 4 months ago and its running great today

 

i replaced the cps twice yeah i got code 41 but that is because i had a voltage regulator externally wired but that was it...................... whooo knows i pressed on the gas and it didnt acccelerate and the rpms didnt raise just idled so must be a feul problem

 

You mention that your problem is spark, yet in the last line of your post you said that you do get spark when you crank the engine and ground the spark plug electrode while checking the spark.

So those two statements don't match up.

And are you testing fuel pressure with an external fuel pressure gauge hooked up to the schrader valve on the fuel rail?

If you have a strong, blue, snapping spark.....then you need to concentrate on fuel delivery.

YES, you can have fuel going to the fuel rail and great pressure, but no fuel going TO the fuel injectors. Yellow/orange/white spark may be a weak spark that isn't strong enough to start the engine.

This is where a noid light attached to the injectors would be helpful to see if the injectors themselves are getting a "pulse".

 

i have a crisp blue spark.......so it has to be fuel haha im just stumped need to test pulse

 

google how to check injector pulse with a volt meter

 

im tellin ya its the map sensor go pick one up at autozone for 15 bucks and run it i had the same soundin problem wit my 95

 

would a bad map sensor really shut off my car and make my car not accelerate when i step on the gas? and then not start just crank crank crank alll day? wasnt the cps? what does the map sensor do? what are the symptoms?

 

for ****s and giggles go out and see if it wont start if it dosen tap it with a screw dritver or small wrench see if it starts just tap not kill lol

 

tried that and nothing haha

 

well is there any other gm cars in the family they have them do a swap and see if it works pay attentiomn to the plugs there a couple diff ones

 

change your ceramic diode thats next to your air box,that will solve your problem.

 

back to injector pulse check with volt meter

 

got a 91 donor jeep same year as mine i will try it........u really think that is even possible that that is it?