Lived in Florida for the past eight years and this was a real problem on long trips or after driving more than 20 minutes in hot weather. Very annoying...wonder if this is something other people have had a problem with. Recently drove from FL to MA and it happened several times on the highway (in busy highway traffic). Not good! Thank heavens for AAA. Since I have been in MA it has not happened once. Any ideas?
On some of these motors the crank position sensor goes bad when it heats up I would replace that first
SOURCE: 88 pontiac 6000 shudders and stalls after approx. 30 min. driving
What was replaced in the tune up? Usually the coil paks cause these types of issues. Also fuel filter or fuel pump will allow enough fuel to start and sputter like you describe.
SOURCE: My 1999 Pontiac Sunfire shut off while i was driving on FWY
You could have a bad alternator and are running off the battery voltage. This is just one possibility tho.
SOURCE: 2005 Pontiac Aztec has an intermittant engine
Next time this happens, reach up and try to turn the key like you are trying to start. It shouldn't engauge starter while in gear so don't worry about that. If it starts up when you do this, you most likely have a weak switch and the weight of your keys swinging may me shutting you down.
Testimonial: "thanks, Ill give that a try."
SOURCE: My 2002 Pontiac Montana has issues starting in hot
check your temperature if it goes up quite fast you have a problem with your radiator or water pump, but if it is ok check your battery and alternator...
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