I have a 1993 Mazda 626 5. Speed manual trans OBD 1, 230,XXX miles . I've been having an intermittent yet consistent issue with my mazda for the last couple months. So as a last resort ive decided to create a thread in hopes that someone may have a solution to my problem. The car runs pretty good in dry weather other than an occasional high idle or idle surge but from what I hear that's a pretty common problem with mazda 626s of my generation and the Ford Probes however this does not seem to make the car stall or sputter just idle rough or idle surge. The issue I'm trying to fix is the sputtering and missfire/ and stalling in rainy weather. Note: this issue only occurs in humid and wet conditions. Sometimes after the car warms up to operating temperature it will come out of it, sometimes it doesn't. Ive replace plugs, wires, and the distributor. I have a stock air filter thats has also been replaced. I've tried both w-d 40 and di electric grease on the plug boots but doesn't seem to have any positive effects. Once the weather clears up and the car dries out a bit it seems to run fine again. Are there any electrical competents that could be getting wet and causing this problem? What types of things should I be checking/ replacing. Any info helps at this point I am at wits end with this one.

 

MIne is having the exact same problem. I cant for the life of me figure out the problem. I am not gonna through parts at it.smh if its humid or raining out my 1991 mazda 626 runs like a turd. but if its dry and sunny I have no issues. once it warms up for a while it sometimes runs ok smh so frustrating.

 

I am not gonna through parts at it.smh if its humid or raining out my 1991 mazda 626 runs like a turd.





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