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Car Forum / Mazda / Mazda Miata / October 2005coil pack questions
I noticed my tach needle jumping around about 500 rpm on the ride to work this morning. It did it for maybe 30 seconds, then settled down and I didnt notice it again. I seem to have read that this is an indication of a bad connection at the coil pack. If so, how do I correct the situation. I noticed the same thing about 3 or 4 years ago, and about this same time of year. Was curious if the cooler weather has anything to do with it or is it just a coincidence. > I noticed my tach needle jumping around about 500 rpm on the ride to > work this morning. It did it for maybe 30 seconds, then settled down > and I didnt notice it again. > > I seem to have read that this is an indication of a bad connection at > the coil pack. More likely, it's a bad connection at one or more of the chassis grounds. Disassemble and clean the multiple ground connector below the master cylinders, and the ring connector on the head near the throttle body. If you let this go, you can fry the coil packs. --- Lanny Chambers '94C, St. Louis http://www.hummingbirds.net/alignment.html > I noticed my tach needle jumping around about 500 rpm on the ride to > work this morning. It did it for maybe 30 seconds, then settled down [quoted text clipped - 8 lines] > time of year. Was curious if the cooler weather has anything to do > with it or is it just a coincidence. In my case it's humidity. Yesterday it rained, my radio quit working (1992, stock radio). I know from past experience it'll be fine when the humidity goes down. Weird, huh? > In my case it's humidity. Yesterday it rained, my radio quit working > (1992, stock radio). I know from past experience it'll be fine when > the humidity goes down. > > Weird, huh? What? You haven't performed The Fix yet? See http://www.miata.net/garage/radio.html It was the first thing I did to our '90 when we bought it almost 5 years ago. Well, almost....I changed all the fluids, plugs & wires first.  SignatureKen Lyons '97 Brilliant Black/'90 Classic Red Inside the Beltway [Remove the first two digits to reply] >> In my case it's humidity. Yesterday it rained, my radio quit >> working (1992, stock radio). I know from past experience it'll [quoted text clipped - 4 lines] > What? You haven't performed The Fix yet? See > http://www.miata.net/garage/radio.html I live in Phoenix, I hate to do the fix for the once a decade rain... ;-) We lived in Phoenix for seven years. During that time, we had at least two "100 year" floods. From this, I suggest you consider the fix. Ken > >> In my case it's humidity. Yesterday it rained, my radio quit > >> working (1992, stock radio). I know from past experience it'll [quoted text clipped - 7 lines] > I live in Phoenix, I hate to do the fix for the once a decade rain... > ;-) > We lived in Phoenix for seven years. During that time, we had at > least two "100 year" floods. > > From this, I suggest you consider the fix. It was working again tonight. I've been here almost 50 years, it really doesn't rain that much. Remember, the "100" year floods come from snow melt and runoff in the mountains, not much rain down here. I lived through the worst of them, we were camping near Christopher Creek when it hit........ > > We lived in Phoenix for seven years. During that time, we had at > > least two "100 year" floods. [quoted text clipped - 6 lines] > lived through the worst of them, we were camping near Christopher Creek > when it hit........ Yea. I hear you. Anyway, Ken Lyons gave you the answer to all of this. It's a known problem which affects pretty much all of them at one time or another. It tends to show up less in the desert due to the lack of humidity. Should work just fine after the fix. Ken > Should work just fine after the fix. I'm too lazy to do it, if I ever do take the radio out it's not going back in, I'll replace it with something else. But I rarely use it, when the World Series is over I won't need it until next year.... > Should work just fine after the fix. All right, I did it already! You guys can quit nagging now... I even missed some of the Packers/Eagles game in order to get it done. PS, the radio turns on now. It's warm and dry. Did the fix do it or? ????????? Now that wasn't so bad...was it? Yep..it was the fix. This is the rainy season in Phoenix; you'll see! Ken > > Should work just fine after the fix. > [quoted text clipped - 3 lines] > PS, the radio turns on now. It's warm and dry. Did the fix do it or? > ????????? > Now that wasn't so bad...was it? Yep..it was the fix. This is the > rainy season in Phoenix; you'll see! Hasn't been for the 57 years I've lived here, maybe I'm just too much of a newcomer? Well...soon, then :-) Ken > > Now that wasn't so bad...was it? Yep..it was the fix. This is the > > rainy season in Phoenix; you'll see! > > Hasn't been for the 57 years I've lived here, maybe I'm just too much > of a newcomer? |
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