RPM gage jumping
04-05-2006, 07:59 PM
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RPM gage jumping
ok well today after i was doing some 100MPH freeway cruising, i came into town and when i was actually going the speed limit (25MPH) the RPM gage was jumping from like 1200RPM to 600 and back ever couple of seconds, no touching the gas at all what-so-ever...was it thast i was right on the low end shift point between 1st and second or 2nd and third or something? I was thinking it was between 2nd and 3rd and the engine could not make up its mind....but just checking to see if this is a preliminary sign of something or something...Thanks!
04-05-2006, 08:05 PM
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Well, you'd feel the car slipping/starting to shift if it was at a shift point, and plus, your shift up/shift down points are quite a ways apart.. so thats not likely the case... it could be something drawing power, and your engine keeping up with the demand on the alternator...
04-05-2006, 08:25 PM
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On ocassion when you get into a coast mode, the ECM can get a little funky with the idle.. Happens to mine every now and again too.. 
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07-04-2005 12:13 AM