misfiring

10

Asked by Mar 28, 2010 at 04:31 PM about the 1996 Chevrolet Tahoe

Question type: Maintenance & Repair

Hi, I'm experiencing misfiring when accelerating up hills mostly, otherwise runs well. No codes came up on
the computer. I changed the cap/rotor, fuel filter, air filter, and put in some cleaner in gas. Still no
improvement. Wires are new last year. I don't have any diagnostic tools. What would be the next step for an
average weekend mechanic?

3 Answers

3,045

How many miles on the vehicle and does the SES flash when it is exhibiting this condition?

1 out of 1 people think this is helpful.
10

Thanks, It has 274k mi., the ses lite has not come on at all. A friend checked the computer with his tool, no codes come up. About a year ago I had the ses lite come on and it read rear oxygen sensor but there was no lack of performance at that time. I tried to get the sensor off but couldn't so I ignored it. I appreciate any suggestions.

1 out of 1 people think this is helpful.
3,045

Drive in a secluded area with the cat pipe disconnected and see if your power returns. The HO2s sensor 2 is only a catalyst efficiency sensor placed there so the PCM can know whats going on with the cat. With your mileage and history as youve described, id say its the catalytic converter.

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