Starts, drives but no acceleration - check engine on

[ngbeat]

Be careful if removing the tach. The current cluster in my car is made from 3 different clusters. The seal at the top of the housing eventually becomes brittle and crumbles apart; moisture gets in and starts corroding things. The screws on the back can sometimes get rusted into the terminals on the tach unit itself, and they'll break when you try to get it off. Some good penetrating fluid with one of those straws works wonders there.

Check your connections to the ignition coil. I've heard that a corroded connector somewhere in that system can cause tach issues as well.

Thanks 4Aaron GE .. Do you know if the blue wire from the coil goes directly to the rpm gauge? There is no continuity on mine.
Using a test-lamp I check signal at the coil, at it shows that there is .. but no signal at the blue wire at the cluster plug :/

Also, is there any other way to perform diagnosis ?