Hi Folks,

I do have a similiar issue on a 92 3.2SOHC manual gearshift. Running rich and a big idling problem, especially with the engine warm. So far, I identified and repaired problems with

* Vacuum leak (that sucked, required 2 workshops to find them all)
* Fuel return line was badly fixed on the fuel tank.
* PCV-Valve full of oil
* Dirt in the fuel filter
* Spark Plug Cables bad, spark plugs got changed anyway

Now it is not running rich any more, but idling is not really good.

The special point about my problem is that it does not repeat itself under similar conditions, sometimes it happens when the engine is cold, sometimes when it is hot, the only circumstance I was able to identify clearly is that it gets worse the higher I drive in the mountains. Last thing missing to check is the EGR-Valve, maybe someone can help me out there. Unfortunately, there are no Isuzu workshops in Venezuela (thanks GM) and access to literatur is rather limited, too. I know this belongs in the dumb and dumber section, but could anybody tell me where the EGR-Valve is (or should be) on the V6 3,2 SOHC (maybe with picture), as I was not able to find it <img src="/forums/images/graemlins/confused.gif" alt="" /> ?