Forum Replies Created
-
Replies
-
VW has no more electrical gremlins than any other car of similar age. Most mechanics argue VW does things differently but really they all work the same way. Granted Ive worked on mainly VW cars but there isn’t any difference in how they fundimentally work.
In your case I would check two things first. 1 with a multi meter check the two outside wires on the hall effect/speed sensor wires for voltage. Needs to be close to 12v. If you have no voltage you need to check that the Ignition control module is functioning. You said you have a new engine speed sensor so I wouldn’t bother checking it for function. I would check the ICM instead. Its usually bolted on top of the ECU. Pull the harness off of it and check that its getting voltage via the pwr and grd. Grd is always brown in a VW. Pwr will be red or red with black stripe. If you have power there check for continuity between the module end of the harness and the center wire of the engine speed sensor. It will be the same color. Also check for continuity between the ICM ground on the harness to the battery negative. I like to check resistance on grounds like that. Too high it wont work.
If you have good power and wireing to and from the ICM go to a wreckers and find a used one to try. They’re cheap as nails. If that doesn’t fix it I would try the coil again. In VW espessialy they are notorious for lasting forever, to the point where people forget they wear out too.