tach drops to 0 and misses

[t5535]

I am having a little trouble with my 94 mtx. It runs fine most of the time but ever now and again it will act up with the tach dropping to 0 and the car will run rill rough like its missing. What mite cause that? it does not do it all the time. the motor is only a year old.

 

[Irish Pride]

Sounds like you need a new Camshaft Position Sensor. Unplug the sensor and see if it runs better. Its mounted on the back camshaft on the passenger side. Did you change the cam seals when the motor was redone?

 

[t5535]

yes cam seals were changed. it only does it once in a while. it has done it twice in the last year but it has been in the last couple month.

 

[hawkeye18]

Classic cam sensor.

 

[SHOdded]

If you did not use the original Ford or the National cam seals, you may have leaks sooner than later, at least per the consensus on this forum. Part number 1213N, make sure it's National brand and not FelPro etc. HTH.

 

[zblackbeast]

Cam sensor. Mines doing the same thing and it annoys the shit out of me.

 

[projectSHO89]

This same general symptom can be caused by a flaky DIS module.

Pull fault codes and see if any related codes are stored.

 

[t5535]

It was cam sensor. Thanks!

 

[hawkeye18]

Classic cam sensor.

 

[t5535]

Yup it was the cam sensor