hi i have a P Reg mk3 golf vr6 OBD2 that wont start. It cranks over but no spark. ive checked the fuses and relays an they seem to be fine the fule pump runs. ive also changed the coil pack leads plugs and still no luck... could they be a fault with the factory immobiliser?? need help asap as the engines going in to a mk2 golf soon. cheers mark.
Also engine blocked by immobiliser. It would be best to get it scanned as "G28", P0340 etc will show up as an current fault it this is the culprit.
ive got a obd2 lead and that vcds programme i pluged it in the car and it ssays its not compatible?? also if it was to be the crank sensor what one its it as ive changed the one on the head and the one on the bottom of the block.
That "obd2" lead you bought must be an ebay special. The sensor you replaced on the head is "G40" or cam sensor. This will not cause a non start. The sensor you replaced, hopefully bottom right, behind oil filter housing would be G28 or crankshaft sensor. Sometimes if this does not sit properly you will not generate a plausable variable signal, required for sensing engine speed and the engine will not run. To be sure that this sensor is working you will need a scan of ECU sensor to ensure the inputs are plausable. You do not have to use VAG-COM 409.1 software to do this as any scanner that reads KWP1281 can do. The PIDs from the diagnostic port should be similar to other makes of vehicle that speak in the same protocols.
i have put another ecu,matchin immbo box and chip from key and still wont start or no spark. u get a spark when u turn the key on and off but when u put the key in crank possition u get the engine turn over an fuel but no spark. any more i dears??
