When youre driving and rpm is say 2000 all of a sudden it will jump to 35000 and then back, what might be wrong?
Wednesday, May 26th, 2010 AT 12:01 AM
5 Replies
DOCFIXIT
MECHANIC
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Hi Does engine rev up? Or does trans seem to slip? Or Tach just jumps with no change to engine RPM?
Let me know
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Wednesday, May 26th, 2010 AT 9:11 AM
DAFFY57512
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No just the tach jumps up and then down, the engine dont seem to rev up but it stays the same speed. Thanks
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Wednesday, May 26th, 2010 AT 9:43 AM
DOCFIXIT
MECHANIC
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Tach input signal is from PCM so if speedo is O.K. And no other gagues effected then most likely the Tach itself. Check engine light ever come on? Only thing it might be is the camshaft sensor acting up.
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Wednesday, May 26th, 2010 AT 10:18 AM
DAFFY57512
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The check engine light did come on, now its running fine but will do it again the longer I drive it. When the rpm jumps up I dont lose power but the engine might rev up a little but you can hardly notice, something happens when it jumps up and back down but its hard to tell. Thanks jeff
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Wednesday, May 26th, 2010 AT 3:27 PM
DOCFIXIT
MECHANIC
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When light is on go to an Auto Zone have code read then post