I have been working on a 2001 VW Passat 2.8 for a while now. I replaced the engine for a customer. Now its misfiring bad.
I did a compression check, everything there is good
Leakdown test - everything good
Replaced coil pack with known good one
Replaced spark plug wires with good ones
Its missing on 1, 5, 6, some times 4, sometimes 3
I have check all my vaccum lines, no leaks. Sprayed throttle body cleaner every place I can think of, and no change in idle.
I did replace the timing belt, but that is all good. Start's right up. Just shakes bad.
I did check for spark at the plug wires and its getting really good spark.
Any ideas?? HELP!