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It is still idling a little rough. Check engine light had stayed off, but came on this morning on the way to work. At this point just glad it is running and drivable. Thanks again guys for all of your input.

come to find out it was a "COMMON PROBLEM" according to the dealer. problem is fixed. the air intake hose from the air box to the plenum was dry rotted on the bottom. it was getting to much air. thankyou to all that have tried to help me and the wife.

update still need help hello this is the hubby turnin the bolts. i tightened the belts ( they were very loose, thought that may have something to do with it). now the car runs even worse.all i did was tighten the belts, and disconected the battery while doing so, cause the bookk said so. im...

Yeah, I'll tell my husband of almost 15 years I'm getting a new boyfriend. I'm sure he will appreciate that. LOL Thanks for the input guys.

OK, that basically changes everything. what was the CEL code? Hubby said the code was "Bank 1 L1 too lean"

We just cleaned the MAF about a month ago. It is a 1.6 2000 Protege DX.

I'll have to get back to ya on that one. I'm at work and don't remember what the codes were. I know after each thing we replaced and took it through emissions, it failed every time worse than before. Finally got to the point didn't have to worry about taking it through emissions anymore. Just...

The check engine light has been on for several years even after replacing everything. Kind of gave up. lol Last year when it got really cold, light went out for a couple of weeks and then when it started warming up it went back on. Well, when he replaced the belts he reset everything which was...

It has idled rough for a while. When it is in park it isn't bad, when it's in gear it idles pretty rough.

New cat and O2 sensors were replaced about 8 months ago. It hesitates when it shifts gears as well. Then when it is at a steady speed it stutters. 169,811 miles on car.

Can any of you guys help me with a mechanical question on a Mazda Protege??? Info on car: 2000 Protege, automatic. Hubby replaced both belts. Now when you go to accelerate, it bogs down. I'm not mechanically inclined but I have the time to do this s*** and get some opinions from other people. :)...