Not Transmission??HELP

ISUZU
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KATBIRD704
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1992 Trooper, 3.2 auto DOC. 140,000 miles
Truck will start sounding like backfiring under left side. It will then lose power and I am lucky to make it home while its still popping. I have to drive it about 20 miles for this to begin to happen. I can put car in park or netual and it will clear up.?
Update-- I took the trooper to transmission shop. They said that the transmission is good. The codes that are popping up are the #32-EGR and #44 02 sensor/ lean.
Its also saying engine misfire???Because of other 2 codes? Now I have to find another shop that works on these. How costly are these? Which one should I start with or change both?
Jan 20, 2007 at 7:47 PM
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SPEED_6929
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have your catalytic converter checked because sometimes if the converter is blocked it will cause an o2 sensor error code and possibly the egr
Jan 22, 2007 at 3:12 AM
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KATBIRD704
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I replaces the 02 sensor and cleaned the egr valve. I can go 10 miles and then it will start the sound of backfiring and losing power. I shut the switch down and can restart and it will drive fine for a couple of miles. does anyone have anymore ideas. I just dont have the cash to throw into this thing.
Thanks
Feb 3, 2007 at 7:35 PM
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NORHAWK
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Take out the oxygen sensor and go for a road test and see if the problem goes away. If you have no power issues after driving for the time frame you said, then I would say that you have a plugged catalytic converter. This is a easy check if you dont have a temp reader.
May 30, 2007 at 5:10 PM
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KATBIRD703
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So Norhawk, do I just unhook the sensor and leave that open or rehook it without it???? If it doesn't misfire then that will mean my cat is plugged and I need to replace it?? I had to make a new user name for some reason.
If I had a temp reader where whould I hook and read from it? Sorry I'm not very knowledgable.
Thanks for the help
Jun 3, 2007 at 9:46 AM
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HUK_FINN
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leave hole open, it'll let exhaust escape before cat. do you have 4 O2 sensors like my '01 rodeo? make sure the o2 removed is in front of catalitic closer to engine
Jul 11, 2007 at 10:09 AM