TPITuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
Welcome to ThirdGen.org!
Welcome to ThirdGen.org.
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!
I have a big question, I posted this earlier and I didn't get many answers.. Here's my problems..
After I warm the car up to temperature, and turn it off, it refuses to start back up, It almost seems like it's not getting a strong enough spark.. So my brother and I went on to changing the spark plugs, and the cap and rotor. But then I remembered what my grand father told me about a '38 plymouth he had where when the coils heated up on the firewall, the car would die, and not start until they cooled off.. Could this be my problem? It throws a code when I first start it up, too.
So I'm leaning toward changing the coil next, I've already changed the oil, and fuel filter (Aswell as seafoaming the engine and gas tank.. It already seems to run smoother than before this work.. Any ideas?
__________________ Traded my 3rd gen in for a 5th...
Re: Refuses to run after warming up to temperature.
Oh yes, I forgot to add. I warmed the car up again after I could get it running again (About 2 hours) And we tested the spark again and it was an orange spark, instead of a blue one. Could we be on to something?
Re: Refuses to run after warming up to temperature.
It sounds like the ignition control module is bad. It is bolted (2 small bolts) to the distributor under the cap. If you take it to a parts store they can test it.
Re: Refuses to run after warming up to temperature.
It could be the coil , ignition module , or pickup coil . All three can give the weak spark if they get hot and are not good parts . To answer your question yes the coil could be going out . A good rule of thumb is to change the coil and ignition module together just like if you have a bad alternator and the battery is old you replace both to be safe . The pickup coil can go bad bt the ignition module and coil are usually the problems .
__________________ Mighty 2.8 power . Enough said .
Re: Refuses to run after warming up to temperature.
It almost seems like a weak spark though, We'll try the coil first, if that doesn't fix it, we'll change the ignition module, and the pickup coil.. We're on a tight budget....
Re: Refuses to run after warming up to temperature.
Yeah do that but if you still have spark issues or they get worse after the coil gets replaced then get an ignition module and you should have no problems with spark when hot .
__________________ Mighty 2.8 power . Enough said .
Re: Refuses to run after warming up to temperature.
Changed the coil, ran 100X better, no more bog when I pushed the gas pedal, it really smoothed out the car quite a bit.. Ran it up to temp.. Keyed it.... Still didn't want to start. We're pulling the dizzy right now to see whats up with it. Is there any way I can check the ignition module at home? We've got a Fluke meter.
Re: Refuses to run after warming up to temperature.
No only a parts store or some shops can . It may pass but be warned that if the module isn't hot it may pass they will have to test it many times to get it to fail . If you can get the car to start and take it to the parts store and remove the module and have them test it then that would be the best .
__________________ Mighty 2.8 power . Enough said .
Re: Refuses to run after warming up to temperature.
Quote:
Originally Posted by Kevman
I have a big question, I posted this earlier and I didn't get many answers.. Here's my problems..
After I warm the car up to temperature, and turn it off, it refuses to start back up, It almost seems like it's not getting a strong enough spark.. So my brother and I went on to changing the spark plugs, and the cap and rotor. But then I remembered what my grand father told me about a '38 plymouth he had where when the coils heated up on the firewall, the car would die, and not start until they cooled off.. Could this be my problem? It throws a code when I first start it up, too.
So I'm leaning toward changing the coil next, I've already changed the oil, and fuel filter (Aswell as seafoaming the engine and gas tank.. It already seems to run smoother than before this work.. Any ideas?
What code does it throw when it's first started up
Re: Refuses to run after warming up to temperature.
Quote:
Originally Posted by ROCHEAD!
I believe i said check what code it was before you guys started this investigation!!!
ps. i like the smiley guys hehehe, they're different from other guys i was used too.....
Haha I now know to check the codes... but looking into the money the previous owner spent on this same problem, I don't feel so bad... We went through 4 receipts from the Parklane Chevrolet Cadillac dealership and it would say in the heading "Would start in AM, but when car was warm, fuel pressure would drop".
He spent $894 on a fuel pump, filter, and a fuel line, $600 changing the MAF, and more money doing the O2 sensors... It was just an ongoing problem for a few years.. It's probably the reason he got rid of the car. I changed the sensor out today for a new one, SES light is gone, and it idles at 700 RPM.. Not bad for $22.50.
. 
