[tachbest]

Hello, I have just encountered my first problem with my 1995.5 Honda Passport and could not find anything on this forum that helps to solve it so I thought I would ask somebody for suggestions. The problem is the car begins to run rough once I run it above 3000 rpm for more than a minute or so (going up a hill or a freeway speeds). The weird thing is that the CEL will come on, then it will run great, except it burns gas very fast and it smells like a very rich gas mixture coming from the exhaust. The CEL will turn off if I keep the rpms down for a little bit and will start running rough once the rpms go back up and the check engine light will come back on then it will run fine. It seems to be going into safe mode or something. I have not had the codes checked yet because autozone could only read 1996+ and I didn't want to pay $89 to the Isuzu dealership to get it done. I explained the problem to a service mechanic at the dealership and he said it may be a bad coil, fouling spark plugs or the intake gasket. I was thinking that it may be a bad O2 sensor. Could somebody please give me some of thier thoughts/experience on what the problem might be or how to go about fixing it. Thank you in advance.

Brett