Question about 1991 Saturn SL2
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Posted on Jan 02, 2017
SOURCE: 2002 Saturn Vue won't start
Non-start situations basically boil down to two things: No Fuel, or no spark.
I you are looking to throw a part at it, start with the crank sensor. They are cheap and not too hard to replace.
A full diagnostic approach would be to determine if it was a fuel or a spark problem. Check fuel pressures with a fuel pressure test guage: Low fuel pressure indicates a bad fuel pump or a bad fuel presssure regulator. Lastly on the fuel side, check t see if the injectors are getting a signal to fire, usually done with something called a noid light, I believe.
Spark diagnosis begins with first determining the condition, then finding the cause. Bad coil, loose wires, even the crank sensor are all suspect. A good repair manual with a flow chart is probably the best procedure to follow.
In my case, my manual only had a passing reference to the crank sensor and no diagnostic procedure to test it or even lead me to it. I found the solution through extensive web searches. Once I replaced it, all was well.
Posted on Dec 24, 2008
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