INTERMITTENT PROBLEM WITH STARTING AND EXTREME GAS FUMES

2000 Isuzu Trooper

Tiny

mailegray

May, 31, 2012 AT 8:26 PM

Have had this since it was at about 160K. Check engine light always on. Temporarily fixed when dealt with a clogged egr valve. Has always had extremely strong gas fumes, especially in hot weather. Occasionally have issues in hot weather with slow/no acceleration then when it jumps forward and rpms drop, slow acceleration again. Now having issue of it not starting off and on. Leaning towards an issue with a connection from the ecu to throttle body or a short in wires but unable to find a wiring diagram to identify exactly which wires to focus on. Any help is appreciated.

FOUND 150 RELATED QUESTIONS

7 Answers

Tiny

Docfixit

May, 31, 2012 AT 8:29 PM

First have codes read then post will advise

Tiny

mailegray

May, 31, 2012 AT 9:03 PM

Will do. I know in the past there was a P0140 for an exhaust recirculation issue and one for a random misfire.
In the meantime, are you able to provide a copy of the electrical wiring diagram showing the ecu and throttle body connections?

Tiny

Docfixit

May, 31, 2012 AT 9:11 PM

140 is faulty HO2S no.2 bank 1 most likely chaffed wiring but if light on constant then O2 may need replacing. This will cause gas smell and other issues

Tiny

mailegray

May, 31, 2012 AT 9:27 PM

What is the best way to check the sensors? I have a diagram showing the location of all 4 sensors (its for a 2002 but I don't imagine there's much difference). Do you have any rough idea of what the sensors cost? Wondering if it would be worth just replacing all 4 and seeing if that makes any difference. Would faulty 02sensor by any chance cause the issue of it not wanting to start? A mechanic also suggested checking the evap canister - haven't done that yet as until we had the diagram, we couldn't find it. It's not where we thought it should be.

Tiny

mailegray

June, 1, 2012 AT 1:29 AM

I was able to get codes. Hope these help point us in the right direction. There were 13 total: P0420, P0401, P1404, P0402, P1125, P1295, P1340, P0300, P0137, P0420P, P1404P, P0402P, P0300P.

Tiny

Docfixit

June, 4, 2012 AT 6:03 PM

Way too, many codes try this clear all codes then runn recheck see what resets

Tiny

rasmataz

June, 4, 2012 AT 6:10 PM

For me sounds like it needs reflashing all those codes

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