tach problem

[juandapoolboi]

when at idle threw 1500 rpms it works but if the engine revs over 1500 rpm the tach fall to 0 rpm until the engine speed drops back down to 1500 or less then it picks back up to an rpm inbetween the 0 and 1500 rpm range ?????????? i tok the instrument panel apart and cleaned the connections and bent the male plug conectors so they would have a tighter connection and that did nonthing PLEASE HELP its driveing me crazy

[Chevylover]

Did you check the connector at the alternator ? There should be two wires at, one for charging the batts and one (the white ??? - IIRC) is for the tach/RPM signal. Broken wire or a short or bad alternator or a bad internal controller ???


Cu,
Sven

[juandapoolboi]

internal controller?? in the gauge cluster????

[Chevylover]

internal controller?? in the gauge cluster????

The voltage regulator inside the alternator. Didn't find the right word in my posting before.

Cu,
Sven

[juandapoolboi]

thanks alot i'll poke around tomorow and see whats going on

[John R]

The voltage regulator inside the alternator. Didn't find the right word in my posting before.

Cu,
Sven If your charging system is working as in it is charging ,then i would say that the sensor or pick-up for you tac in your alternator is not working properly or is worn out

[grancito]

Sounds like the tach wire from the alternator is broken, it connects via the regulator to the coils in the alternator.