Question about 1995 Jeep Grand Cherokee

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Hi there - I went to get my vehicle smoged, it failed. I'm in the process of buying it, and it had a passing score in February. I passed on the 'Idle' portion: (my car read at 0.3, max is 100) I failed the '2500 RPM' portion: At 2404 RPM, the max allowance is set at 1.00, my car registered at 1.31. The repair place said it'd cost $200 just to give an estimate of repair cost. (is this a rip?) Also - On the report, They call my car a Truck, I thought the Jeep Grand Cherokee was an SUV, and if they tested it as an SUV wouldn't it pass? Thank you, Lisa Walker

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Try driving the vehicle around for 5 to 10 minutes before testing. the catalytic converter, which is what breaks down most of the pollutants, is heated by the engine exhaust and doesn't function efficiently until it is at about 1000 degrees Fahrenheit.

Posted on Dec 10, 2008

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Failed Smog: Have VIR report, 95 Jeep Grand Cherokee


You could install a new catalytic converter and oxygen sensor for under $200 instead of paying someone to tell you the same thing. If you go that route, you can get cheap parts at Quadratec.com or just plain old Autozone. You just have to cut the old cat off and clamp a new one on. I did mine in about an hour. The O2 sensor is easy too. On a side note, make sure your car is drive at highway speed for around 20 minutes to ensure the cat is hot enough to properly work.

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