Calgary Jeep Association
4x4 Related Groups => Tech Talk => Topic started by: parabs on October 09, 2010, 01:30:53 PM
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Over the last couple weeks, I developed what seemed like intermittent power loss, and last night it was confirmed. I drove 800kms, stopped for about 2 hrs, then came from med hat to calgary ~280kms.
I couldnt go over 110 in top gear, I had to press on the pedal to maintain speed going down hills, ie the hill by Gleichen (sp?) and I burnt 60l in a trip that I usually burn much less.
Im going to change out the plugs, im not getting the check engine light, and I checked the codes with my own personal reader and got nothing.
Maybe O2 sensor?
Your thoughts?
Thx in advance. ;)
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Map sensor? That caused me to blow black smoke and I had a major power gain when I replaced it.
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I changed the plugs, no noticeable change.
I read on jeepforum.com, and then I disconnected the upstream o2 sensor, and it is working pretty good now, so I am going to change it out tomorrow.
If the problem recurs, I will have to look deeper into the map sensor..
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im not sure what kind of scanners autovalue has, but maybe give that a shot. they let you use them for free i believe. the snapon ones will show you voltages, you can check o2 cycle voltage
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catalytic converter could be starting to plug up. try the O2 sensor, then try cat con.
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turns out it doesnt seem to be the O2 sensor. I changed out the TPS and now it is running much better...but I wont know if it is fixed until I run a couple tanks through it..
I didnt think of the cats Eric, do you know if you gut/cut out a cat will the computer throw codes??
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it could throw a code as the downstream O2 isnt getting the reading it should. but ive seen some that didnt really care after the cat was removed. so it may be worth a shot.
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there are ways to fool that downstream O2 sensor. cheap too........ I have the one on my gf's TJ fooled for months now :)