Question about 1997 Pontiac Bonneville

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1997 Bonneville SSEI Spontaneous ELECTRICAL Shutdown

The first time this happened I received message 'transaction not available' as each electrical option shutdown.
Car would not restart without a boost ; would not continue to run after a boost.
2nd time - noticed gauges not working then ABS and traction control and stopped working - I spun out of control.
Car would still run and tested the battery was fully charged.
Alternator and Battery have both Tested "Good"
Code Reader Shows no Problems
2nd Alternator test - car ran.idled 15 minutes off Alternator without
any electrical problems showing up
anyone know where to explore next ?

Posted by on

  • farmall boy Feb 09, 2009

    My 1997 Pontiac SSEI equipped with the supercharged 3.8L engine, stalls @ highway speeds. I have 175K miles on the car and have NO major problems. The car has had routine maintenance performed and just had a complete tuneup less than 5K ago. The fuel pump is reading is 42 psi @ idle. NO fault codes. Any ideas? Thanks. Dave

  • Anonymous Mar 09, 2009

    I am no mechanic but I had the same problem with my car. WE changed the crank sensor, cam sensor and finally the computer. It was A OK then the fuel went out once we changed the computer. My car was reading the same PSi on the fuel pump and reading no codes either. I hope this helps too. And if you do change the computer make sure you are aware that it needs to be programmed to your cars VIN number and that a dealer is about the only place that can do it unless you order from a place online that will do that for you in advance. I got mine done that way.

    thanks Sharon



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Try ingintion coil

Posted on Jan 06, 2009


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