1987 ford ranger
this may sound crazy but when i go to work appox 30 miles of a morning my truck
runs great as the day gets hotter and i drive home about 10 to 15 miles my truck
starts chocking and the longer i drive it the worst it gets then finally it stop running.and
will not start . now if it sits for about an hour it starts fine and runs this only happens
when the outside temp is above 80 degrees sounds crazy but i can drive home ok
when the outside temp is less than 80 degrees i had two mechanic look at it with no
results if anyone could help with info on this i would very much appreciate
Common symptom of a faulty TFI module or also known as the Ignition Control Module (ICM). It's looks like a grey candy bar that is attached to the side of the distributor and a multi prong plug in it. You can just replace it or have it tested first to see if in fact I'm guessing correctly.
Very likely the TFI Module. The best test would be to drive the vehicle until it acts up and hook up a spark tester to see if it's losing fire. I used to have a spare distributor that I could plug in and make the coil fire if I thought the TFI had failed. I'm not sure of what results you'll get if you have a part store test it because by then, it would have cooled off enough to work again.
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