87 300tdt tach dead, ABS lite on, rough idle
 

My 87 300tdt sometimes starts really rough, and when it does this the tach won't work and the ABS light goes on. usually after a few minutes, the car kind of jerks, and starts running fine, and the tach starts and the ABS light goes out. What the heck?

Electrical? Vacuum? I can't figure it out. Help. It's doing it more and more often, and for longer periods of time.

me too
 

I hope there is a solution to this. I have the same issue but it doesn't correct itself.

No tach, ABS light on, rough start and rough idle.

87 300tdt with 235k on it.

Anyone?

solved
 

Hi wes,

here is some good news:

a 10 amp fuse in the OVP relay found along the firewall behind the battery was bllown. That's the over voltage protection relay. It's under a plastic shield.

changed it out and it's all better.