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geo tracker running rough no power
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jk4fish
New User
Dec 16, 2009, 4:54 PM
Post #1 of 2
(4399 views)
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geo tracker running rough no power
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I have an 1997 geo tracker 4 cylinder manuel tran.morning after first freeze started running really rough with no power. auto zone code thingy said " multiple cylinder missfire and o2 sensor system failure or something close.When i unplug the lead to the o2 sensor upstream of the converter it runs the same. I,m relatively poor and can't afford to chase this around at christmas. 3 kids. $70 sensor. safe bet or not? can I check it without being out $70? thank you James Knies
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steve01832
Veteran
Dec 16, 2009, 5:02 PM
Post #2 of 2
(4396 views)
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Re: geo tracker running rough no power
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The odds of an O2 sensor causing a multiple misfire are slim to none, and slim just left. You would more or less be looking at ignition system components. I would start with testing spark at all cylinders with a spark tester. Check the plugs also. You could have a cracked distributor cap or a bad coil pack depending on the system your vehicle has. Sorry, I don't have a shop manual in front of me right now to check.
Steve
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