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Old 09-10-2012, 04:38 PM   #1
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Error code 51 and o2 sensor help?

Recently I just fixed most of my idling issue by replacing the TPS and the IAC "although it idles around 800 it still drops down a couple times when stopped". But I just got a code 51 for it running to lean, Iv already replaced all filters and cleaned out injectors , any idea if this could be caused by an o2 sensor or a bad catalytic converter? When I shook the cat I could hear it rattle and hear my muffler rattle like there were loose Lego pieces inside, any suggestion on how to fix the code? Also sometimes when driving about 15 mph or other mph's when I hit the gas the Rpms go to 2,000 but i stay at the same speed like there's resistance or something holding me back, but after playing with the throttle I can get it back tO normal?

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Old 09-11-2012, 02:03 PM   #2
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After researching I found possible symptoms could be o2 sensor,clogged cat,ignition coils "although I never have a problem starting the jeep regardless of engine temp", map sensor or engine coolant temp sensor, any suggestions? I don't have a check engine light and the car runs fine when cold it only acts up when warm

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Old 09-11-2012, 02:07 PM   #3
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Go to any auto parts store they should be able to look the code up for you with a code reader
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Old 09-11-2012, 04:26 PM   #4
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It's a 94 they can't read it. It seems like playing with the throttle "clears" out the problem and I can get going again, but it only acts up when the car gets warm
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Old 09-11-2012, 05:25 PM   #5
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Quote:
Originally Posted by cautiocones
It's a 94 they can't read it. It seems like playing with the throttle "clears" out the problem and I can get going again, but it only acts up when the car gets warm
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