20 Most Recent
1997 Chevrolet Express Questions & Answers
No spark to the coil
No spark to the coil or is it no spark from the coil? First verify that you have 12 volts to the coil when you turn ignition switch on if not you will never have spark from the coil going to the plugs. If you do have 12 volts to the coil and still no spark you have a bad coil. To see if the coil is firing, unplug a spark plug wire from it's plug and hold it to a chasis ground while attempting to start the vehicle. There should be a strong spark and popping sound. Remember to wear leather glove or thick work glove if holding the wire by hand to avoid shock. If there is a strong spark then coil is good.
Wont start just clicks
is the battery fully charged? will it jump start/ if the battery is good and it wont jump start. It sounds like a bad starter, sometimes on a GM auto you can tap the starter housing with a hammer and get it to start if this works you will need to get a new starter. Note tap the starter dont beat on it.
No power and speedometer swings between 0 and 90 mph while van is barely moving
HelloThe engine
and transmission in this cars drive train are fully
electronically controlled by a computer called the PCM (Power Train
Control Module). Whenever a problem like this occurs the computer
stores a record of the problem (there are of course some exceptions
to this, like the fuel pump, engine coolant teperature sensor and MAF
sensor for instance) in the form of a fault code in its memory, to
read these fault codes you must have the systems memory scanned with
a special tool. Once the fault code(s) are read you then must perform
the appropriate diagnostic testing to find and resolve the problem(s)
DO NOT REPLACE ANY PARTS UNTIL THE DIAGNOSIS & TESTING IS
COMPLETED.
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