I have a 1997 Mitsubishi Montero LS V-6 with 160,798 miles. It has been misfiring and losing power under hard acceleration and on uphill grades. The check engine light comes on and if you pull over and put the gear shift into neutral, the engine runs flawlessly, without any skipping throughout the entire RPM range. My dealership checked the code and reported that a plug was misfiring and that the vehicle would need new plugs and wires, even though they had replaced them at 120,000 miles. My original plugs and wires lasted 120,000 miles! At any rate, I had them put new plugs and wires in and the vehicle continues to misfire and shake on longer or steeper uphill grades (under a moderate load). Again, after pulling over and letting the vehicle idle in neutral it seems to clear up and you're on your way again, until the next time. I am thinking it might be some kind of sensor, but I am not sure what is going on; I know I am not going to replace the plugs and wires again until I get an answer to this question. I appreciate your help on this. Thanks very much.
have the same problem?
Saturday, November 24th, 2007 AT 8:33 PM