which sensor controls rpm's??
 

my rpms stoped working acouple days ago...i was wondering if a sensor or something went bad? or do i need to check for something? anyone have this problem before??

Do you mean to say that your tachometer stopped working?

i'm guess he meant tach too... i forget which sensor... it's the cam i think that reads the RPMs... I think... that are the crank sensor...

yeah my tach...where can i find the crank sensor??

crank sensors right above the starter in the block, cam sensors behind the manifold right nexto the oil psi sending unit..

thanks

Wouldn't he be getting a code if the crank sensor failed?

Yea, if it was the crank sensor it wouldn't be running (at least not tolerably). Gotta be the wiring from the PCM or a connection on the dash.

i didnt get a code just ran worse and worse till it wouldnt start at all..

But this guy's car is still running, he just apparently gets no reading from the tach.

Same Problem
 

Without that crank sensor you wont be running. Computer wont know when to fire ignition so I don't think there's any failsafe for that. cam sensor is just a 1x so that tells the computer whether its on intake or exhaust stroke. If its not reading anything on tach but engine is running I would look at either dash / dash wiring / or tach output from your pcm

The stepper motors in the dash are NOTORIOUS for just flaking out.

Check ebay for "stepper motor kit" and kinda go from there.

On a '99 it's not just the 'pull-up' resistor?

-KP