co4rnr

I posted this earlier so here it goes again. I have code 6 showing up and was wondering what I should do about it. The truck still seems to run fine. I jsut don't want to get stranded. Code 6) Engine Speed (RPM) sensor, circuit Ignitor or circuit, distributor, ECU. What could have caused this and how do I fix it?

dcg9381

It means there is a signal issue in the ignition system somewhere. It's going to be hard to find unless the truck quits running or it constantly throws the code and you have access to an oscilliscope.

Most mechanics would start replacing parts (guessing) until it goes away.

I don't know anything about the engine speed sensor, however.

HAve you looked at the factory service manual in regard to debugging this code?

co4rnr

No, I have not looked at the FSM. However, I know a mechanic with a oscilliscope I think. What he has is something that looks like a computer that has a graph of how the engine runs. It looks like a sin curve. Would that be able to tell me what is wrong?

dcg9381

It'd be able to show you the ignition signal. If something was getting spiked, had noise, or was producing a bad signal you'd be able to see it. It requires some electronics experience.

co4rnr

Just thought I would let everyone know that this was a simple fix. I unplugged the coil to crank the engine and forgot to reset the ECU after that. Unpluging the coil set off the code 6.