cranks but no start

[sas4ever]

i have a 1998 pontiac grand prix 3.8 and all of the sudden today it wont turn over. it also snowed last night and today..however i drove it last night without any issues. today it just cranks and cranks..it has a half of a tank of gas,,i know its getting fuel and the starter is cranking... i was told it could be an ignition control module...any thoughts????

[Imp558]

Have to start with the basics. Try to find out the fuel pressure after you verify that it has injector pulses and ignition pulses.

[Schurkey]

i have a 1998 pontiac grand prix 3.8 and all of the sudden today it wont turn over. it also snowed last night and today..however i drove it last night without any issues. today it just cranks and cranks..it has a half of a tank of gas,,i know its getting fuel and the starter is cranking... i was told it could be an ignition control module...any thoughts????

If the starter is working properly, the engine is turning over.

 

Your problem seems to be that it cranks but won't start. That's entirely different from "won't turn over".

 

Sure, it could be the ignition control module. Could be fouled plugs. HOW do you "know" that it's getting fuel? If it's getting fuel, but won't start--yet it "cranks and cranks", the plugs are almost certainly gasoline-fouled by now.

[Imp558]

I suppose I jinxed myself by replying to this one, my "new" 80K L67 did the same to me this morning on the first truly cold day of winter. I checked the schraeder valve and no fuel so the next step is to jump the relay and check the pump, then see if the PCM is putting out power to the relay. If yours has fuel pressure and it's adequate you'd start looking at the ICM and Cam sensor. A severe drop in temperature like we both experienced is likely electrical, Fuel Pump, PCM, ICM, CPS. But from what I've seen the 3800 CPS will usually get grumpy for a while before it fails completely.

[sas4ever]

Ok so here is an update.. I have plenty of fuel pressure at the rail. Replaced a broken map sensor. And verified I have spark to the plugs. So I have ruled out ignition control module..so it has fuel and spark but when I took off the tubing from the airbox to the intake and put my hand there while cranking it there is little force pulling air in could this be mechanical now?

 

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[19Cutlass94]

....You need air and fuel to make a car run.

[sas4ever]

GOT IT!!! Fouled plugs and I think they were original I have only had the car a few months

 

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[Imp558]

Is your check engine light on?

[sas4ever]

Ya

 

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[Galaxie500XL]

True enough, but timing is everything.

....You need air and fuel to make a car run.

[Imp558]

Pull the codes with a scan tool and you'll likely find out how it's fowling plugs.