I have a 96 VW Jetta with the 2.0L ABA motor. For the past couple of months the Jetta has been running as if it is misfiring while driving. I have tried to find the problem but without success. VAG-COM software says that I am getting an "implausable signal" from the crankshaft position sensor. I had replaced the sensor and the car ran fine for a day and then back to misfiring. I then proceded to replace the coil, distributor cap, rotor, spark plugs, and wires. Again, with the replacement of each of these parts the car ran great for a day and progressively went back to the now normal misfiring. Keep in mind, everytime the Jetta went back to it's misfiring self, the computer would give out the code for "implausable signal" from the crankshaft position sensor. Since the misfiring problem seemed to have undertones of a ECM problem, I decided to replace the ECM with a working used one. I had replaced the ECM about four years ago due to a faulty coil which fried the thing. With the ECM replaced, once again the car ran great for a day then back to misfiring. A couple of weeks ago the Jetta drove into the driveway and not out. The poor thing will not start at all now. I decided to replace the distributor/hall effect sensor. The car still will not start. I know through testing components that I have power going to the coil but am not getting any spark. At this point I am reluctant to continue replacing parts unless I have a pretty good idea the replacement parts will work. Any ideas from the peanut gallery? Would the engine immobilizer go faulty and cause this? There are many components to the ignition system but only a hand full will actually prevent the car from starting so is there anything I am missing? I have owned many VW's from the Mk I's to the Mk III's and have always worked on them myself without too much trouble, however this one really stumps me
-- hasenpfeffer-motorwerks
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