98 Trooper 3.5L vengine went dead on the road today. Of course it started
again after I came back with a hired hand. We drove it to the garage,
mechanic is looking at it right now... I'm wondering if such behaviour can
be due to faulty crankshaft position sensor? If I understand correctly it
can prevent ignition from working? Come to think of it occasionally I had to
crank it more than usual, especially if the engine was warm.
I had a 1993 Nissan Altima that had a bad cam shaft position sensor. It
would run fine one day, stutter horribly the next or some days not run
at all. No computer codes were ever generated. On the Altima the
sensor was part of the distributor. The O-Ring on the distributer
leaked allowing oil to get to the sensor. The distributor had to be
replaced at a cost of $500. Warranty covered it.
AllData says that camshaft sensor drives fuel injection sequence, and in
case of failure ECM switches to limp mode (but still runs!). Crankshaft
sensor, however, generates ignition pulses for ECM... it is not mentioned
specifically but I reckon lack of ignition pulses will cause total ignition
failure. There were no error codes generated, however.
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