Ignition Coils and Ingnition Control Module

[Corndog Man]

The 3.8 just died in the intersection and rolled into a parking lot and won't start. The code was multiple misfires. P0300.

Shop indicated arcing in the three coil packs and ignition control module. Is this something anyone has experienced. It's about $800 to do the job.

I know where the coils are but not ignition module. Coils shouldn't be hard to replace. Ignition Module, I don't know. Anyone done this?

Corndog...

[maxwedge]

Ign module is directly under the coils, you should be able to do this yourself, price the parts at Napa or Carquest.

[Corndog Man]

Originally Posted by maxwedge

Ign module is directly under the coils, you should be able to do this yourself, price the parts at Napa or Carquest.

Thanks!

I can do that after changing and charging the AC and replacing the waterpump on the damn thing.

Looks to be about 50 bucks per coil and 175 for the control unit. Ist his common? It has about 135K on it.

Corndog....

[maxwedge]

One or the other but not normally both unless a coil arced over to the module, that would do it.

[Corndog Man]

Originally Posted by maxwedge

One or the other but not normally both unless a coil arced over to the module, that would do it.

The shop found all three coils were fried and the control module. I am having it brought home. I will fix it for me for a good daily driver.

I will just go back with the factory parts I guess. Anyone have a good black 1999 LTZ bumper cover for sale?

Corndog....

[Corndog Man]

What will cause this to fail? Age? The car has 135K on it.

Thanks!

Corndog...

[no2guncntrl]

I got a new OEM module from this guy for 42.00. It's for a
3.1t but maybe he has one for your ride..
http://stores.ebay.com/MAD-AUTO-PART...QQftidZ2QQtZkm

[Corndog Man]

Originally Posted by no2guncntrl

I got a new OEM module from this guy for 42.00. It's for a
3.1t but maybe he has one for your ride..
http://stores.ebay.com/MAD-AUTO-PART...QQftidZ2QQtZkm

Thanks!

I got the module and three coils installed. Unfortunately, that isn't the total problem. It turns over and wont fire. No codes.

I don't want to spend any more than I have on the car. Is a great car but its pretty dead right now.

Any other suggestions?



Corndog...

[sad-lumina-owner]

Originally Posted by Corndog Man

Thanks!

I can do that after changing and charging the AC and replacing the waterpump on the damn thing.

Looks to be about 50 bucks per coil and 175 for the control unit. Ist his common? It has about 135K on it.

Corndog....

Go to the wrecker first. Then you can swap them out and see before you spend big bucks.

The coils can easily be checked for shorts or open circuit with a voltmeter. They're just coils (transformers) after all, and should all be the same resistance on each pair of connections

Dang too late: sorry: go back and get the old coils there may be nothing nwrong with them

I had the same problem on mine (3.4L v6), and it was the timing belt stripped out.

Needed belt and pulleys (they sell a pulley kit) I think the total was about $350 with belt.

You can do it yourself, but get the overhead cams lined up right and hold them with visegrips.

[maxwedge]

At this point some real diagnosis is in order, spark at the plugs?, Injectors pulse? will it start spraying carb cleaner into the intake, try disconnecting the maf., Do you see cranking rpms on a scanner?

[Corndog Man]

Originally Posted by maxwedge

At this point some real diagnosis is in order, spark at the plugs?, Injectors pulse? will it start spraying carb cleaner into the intake, try disconnecting the maf., Do you see cranking rpms on a scanner?

Will try those things. Yes scanner has cranking RPMS.

Corndog...

[Manowarr]

Crank sensor?

[Corndog Man]

Back to this beast.

Has spark, compression is 120. Sprayed starting fluid in it. Replaced crank sensor, all three coil packs, ignition control module. So far I have tested the circuits for crankshaft sensor and the camshaft sensor. Still not running.

I am still suspect the timing chain has slipped. Here is the weird thing. With the 3 an 5 plug out to test the spark, the thing started ran for 10 seconds and died.

Corndog. I miss a distributor. Its a lot easier to tell if the chain has slipped. I will pull the wheel off and use a breaker bar to see if I feel any slippage on the crank.

This has me puzzled. This is actually a nice car. Well maintained, new tires.

Corndog...

[maxwedge]

Check the wire from the cps to the icm for cuts frays and pinches.

[Corndog Man]

Originally Posted by maxwedge

Check the wire from the cps to the icm for cuts frays and pinches.

Will do! I paid to have a new oil pan gasket put on the car. Will check on that.
I really want to get this car running. Other than it won't run, I had the wrong bumper cover put on it and that has to be fixed! :-) You dont see many black LTZ's running around.



Corndog...