It is a 1987 buick lesabre with a 3.8 v6 and it will run for 15 min then shut off and will not turn back on for hours. Not getting any warning lights of check engine and I have replaced ignition module and coil pack and thermostat and fan relay and it is still doing this.

What do you guys think is wrong because I need to fix this thing soon so I figured I would bounce it off you guys.

 

the fuel filter is clogged maybe same problem in and old pickup
well does it die if u hold the throttle open

 

It will run around and drive and it is maintaining fuel pressure and I replaced the fuel filter after it started. Just replaced the thermostat but it still does it and its not overheating. Do you guys think it could be the fuel pump relay?

 

It is possible that the replacement parts (coil, ICM) were bad even though they are new.

The symptoms pretty much the same as you would get with a bad coil or ICM.

 

Is it the kind where 3 coil packs sit on the ICM. Or is the ICM stand alone with a single coil?

Did you install the ICM with the heat-sink paste?

 

Sorry, but since this is not F-body realted at all, I have to lock it, site rules...