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Originally Posted by SvilleKid
Fuel injected? with computer (probably)? May not be able to adjust the idle. Maybe can. I've had them where the computer would override the small amount of adjustments many systems allow!
Have you checked the throttle flap inside the tube at the intake? My pathfinder has a periodic need to have that area cleaned. It gets gummy, and there are a couple of small holes in that area (on the pathfinder) that get the "gummy" film covering them, and that really screws with the idle rpm and the low rpm power. I end up cleaning this area about every two years (when it was a daily driver). Be warned, though, some manufactures (Ford is one) warn about cleaning these areas, stating that there is special coatings for these surfaces. My 1997 ford warned of this. Cleaned it any way, and haven't had any problems from it. in the event you clean it, gasoline works about as well as anything, and since gasoline is what the basic gumming is caused from, gasoline has less chance of causing damage (though, obviously, using gasoline as a cleaner has heavy risks involved!). Personally, I've always used carburetor cleaner without issue.
Might be worth a try. Just take care NOT to touch or damage the mass-air sensor that is located inside the ductwork! very expensive to repair. Good luck!
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My Bonneville would have a slight rough and slow idle, plus the SES light.
The SES code showed Mass Air flow sensor problem. Before spending $130.00 for a new one I bought some Mass AIr flow sensor cleaner($7.00) and used it. So far so good, no more idle problems or SES light, all gummy gunk removed.
This Cleaner is suppose to be safe for fragile electronics in that area.