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Topic
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Codes: P0420
My jeep has been slower to start and has idling problems. After start up about 2 mins in park or 1 min when in drive my rpm bounces around the low hundreds and then jumps up to about 800. It does this for about 3 minutes. If I am moving my gas pedal increases the rpm but i have to play with it to maintain speed. I just replaced sparkplugs and cap/button. That increased my mpg but now I want to get the idling issue resolved. It sounds like the engine is choking out but it has never stalled. I would simply go to a mechanic in my area but I am a college student so cash is tight and i don’t know of any mechanics. Please help.
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Replies
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I would check for a vacuum leak, get some carb cleaner and on a cool engine spray litely around the throttle body and intake gasket area, Also check all your vac hoses for cracks or loose connections
Remove the o2 senor before the cat and take it for
a ride.see if power is restored. you could also
bang on the cat to listen for loose internals.
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