Ignition Module Failure
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Ignition Module Failure
Why does my ignition module keep failing? Heat? The truck gets hot and won't start. Once the module is replaced it works fine. I would like some feedback before I go buy a new distributer, at least I could warranty it.
Brian
Brian
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It's a 90 F150 302 and I have replaced it twice since spring and now it's on that get hot and won't crank cycle again. The first one left me in a parking lot. The replacements may just be poor quality. It's so hot here in South Ga. around 95-100 driving during the day. I would think it was a hard start in the heat but it cranks fine in the heat for a while after they were replaced. I realize other things could causing a no crank condition when hot and I haven't checked for spark on this part, however, symptoms are classic IM.
I can warranty the whole distibutor but not just the "electronic part". I probably will just but the part from a different vendor this time. I thought someone may read post and say "that was a problem for me and this is the solution". Is there an condition that you can think of that may kill the unit. Odds are that I just have bad luck. I have had some vibration after driving for an hour or so, I thought it was the torque converter (I just rebuilt the tranny and replaced the torque converter about 3000 miles ago) but now I'm convinced it's motor vibration. It's rpm dependent and only when hot. I think it's the IM failing.
Could the induction device in the distributor or coil cause it to fail?
Thanks
Brian
I can warranty the whole distibutor but not just the "electronic part". I probably will just but the part from a different vendor this time. I thought someone may read post and say "that was a problem for me and this is the solution". Is there an condition that you can think of that may kill the unit. Odds are that I just have bad luck. I have had some vibration after driving for an hour or so, I thought it was the torque converter (I just rebuilt the tranny and replaced the torque converter about 3000 miles ago) but now I'm convinced it's motor vibration. It's rpm dependent and only when hot. I think it's the IM failing.
Could the induction device in the distributor or coil cause it to fail?
Thanks
Brian
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Joined: Jul 2004
Posts: 6,200
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From: Easton, Pa.
Well, back up a little. You need to do some testing to try to see what is happening after the second time.
The "TFI" plugs into a sensor called a PIP inside the distributor. This sensor may be physically breaking up from age.
The TFI must be installed with a coating of heat conducting grease between the unit and the distributor bowl or it will overheat and fail.
Next check out the plug and wires that go onto the TFI.
There could be other sensor and plug intermittant faults adding to the confusion.
The engine is speed density and all the items must be in place and working or there can be a no start condition. The year /age makes the truck a candidate for such ills.
I owned an 85 efi from new and saw many of these ills.
Good luck.
The "TFI" plugs into a sensor called a PIP inside the distributor. This sensor may be physically breaking up from age.
The TFI must be installed with a coating of heat conducting grease between the unit and the distributor bowl or it will overheat and fail.
Next check out the plug and wires that go onto the TFI.
There could be other sensor and plug intermittant faults adding to the confusion.
The engine is speed density and all the items must be in place and working or there can be a no start condition. The year /age makes the truck a candidate for such ills.
I owned an 85 efi from new and saw many of these ills.
Good luck.