Question about 1997 Chevrolet Tahoe

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97 tahoe bad miss when ideling

Runs great when driving

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  • jancsi1965 Dec 03, 2008

    hi my 97 tahoe has a bad mis when idelling but ok when driving also the heater only works when i give it some gas and then it stops i changed the thermostat but still the same .

  • gaupbloc Feb 23, 2009

    i just watch my local news and found out that a area gas station mistakenly surplied customers with diesel gas while purchasering regular unleaded unforturely i bought some gas from one of the station less than two minutes after pulling off the truck(97 tahoe 5.7) cut off and refused to restart i thought maybe the fuel pump went out, so i replace it. not knowing the gas might be bad i put it back in the truck it started but would not idell correctly ran good while driveing but need gas at stops to stay on i thought maybe o2 sensors so i replaceed the down stream one. started it same problem by now the bad gas is gone. so the next day i go to start the truck it wont start i buy the two more o2 sensors up stream but the truck still wont start any suggestion ?



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Turns over but wont start

Posted on Feb 24, 2009

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For a larger engine, they could still be missing but you won't notice it once it is turning above the idle speed.
For both of you, I would suggest you check under the hood in the darkest area you can find and with the under-hood light disconnected if you have one, for sparks along the sparkplug and distributor leads.
I had to replace all of them after only four years on my lousy GM vehicle.
For jancsi; check for a drive belt that is close to failing. Your problem sounds like a water pump that isn't being turned as it should. That's why the heater works when you rev the engine, the slippage is less significant once the RPMs are higher.  

Posted on Jan 18, 2009


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