any ideas??

2003 malibu no lights on pass lock system never seen one. fuel pressure good,alternator good out put, never a check engine light, new plugs wires, fuel filter, air filter, fuel injectors cleaned. no the problem sometimes maybe 6 times per month on regular driving this car will shut off while driving sometimes while setting still at ilde no stuttering or nothing just shut down. driving 45 mph gauges went crazy for a second car shut off and then back on all in about 8- 10 seconds? driving 35 cut shut down nothing came back on key removed restated instantly?? any ideas??

2003 malibu no lights on pass lock system never seen one. fuel pressure good,alternator good out put, never a check engine light, new plugs wires, fuel filter, air filter, fuel injectors cleaned. no the problem sometimes maybe 6 times per month on regular driving this car will shut off while driving sometimes while setting still at ilde no stuttering or nothing just shut down. driving 45 mph gauges went crazy for a second car shut off and then back on all in about 8- 10 seconds? driving 35 cut shut down nothing came back on key removed restated instantly?? any ideas??


Any horn honking?

Cheers
Stripe

no horn honking

Could be electrical part of ignition switch, not key.

i had a similar but not exactly the same problem - car would run fine, but not restart when warm - would wait a while, then it would start and run fine. Turns out the ignition relay was failing when it was warm - maybe your relay is failing after being energized for a while.

That being said, a bad relay might not account for the gauges to spike then go dead, but a bad ground might.

good luck

Todd
(not an expert)
97 Malibu 3.1 147k

my mechanic today said no codes in the computer except old abs codes.. so he has had the car all wekend and it did it with him a few times he said he has seen similar instances where the crank shaft sensor is cracked and when hot it swell and oil enters the sensor component and causes iratic problems but he still is not sure, so he suggested we try that 1st so 31.00 for part 40.00 labor and we will see tonight...