Question about 1997 Pontiac Bonneville

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1997 Bonneville lost power going up a long hill

My 1997 Bonneville lost power while going up a long, steep hill after driving for two hours through a 103 degree valley. No idiot lights came on, all gauges seemed normal. The car just started slowing down, so I pulled over and stopped. After waiting for 20 minutes, I started it up again, and drove home for an hour at 55 MPH without incident.

I took the car to a mechanic, and the car didnt throw any codes.

Thoughts?

Posted by on

  • larryp301 Jul 18, 2008

    Thanks for that. I have no idea if that could cause a total loss of power, but I'll have it checked out.

  • Anonymous Mar 22, 2014

    started missing real bad has no power to pull a hill

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Sounds like your fuel boiled to a gaseous state, and starved the injectors for liquid fuel. This happens alot in older hot carbureated engines.

Posted on Dec 01, 2011

  • Aeon Long
    Aeon Long Dec 01, 2011

    Overall, sounds like a fuel delivery issue. No mention if you were under a quarter of a tank or not on that long steep hill?

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The only thing that comes to mind is the catalytic convertor in the exhaust system.It can become restricted,reducing flow in the exhaust system,which also reduces engine power.These convertors run at fairly hot temperatures,and the extreme heat and conditions aggravated,or overloaded it.It's not very expensive to have it checked at a reputable muffler shop.I have seen extreme instances where this caused parts of the exhaust system to turn red,glowing hot.

Posted on Jul 17, 2008

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