One for the car mechanics
Engine will turn over but not start. You wouldn’t get a spark as the ECU doesn’t know where the crank shaft is to tell the coil packs to make the plugs spark at the right time.Posted 4 years ago
Crank sensors either work or they don’t, they often fail when they get hot then start working again as they cool down. It’ll throw up an error code so its worth getting them read before you go to far.
Have you filled up recently??? Are you sure you put petrol in??
If CPS has failed you are very unlikely to get a spark or fuel. I dont know VAG systems very well. Does the revcounter normally register when cranking? Is it now?
You could be flooding the engine if it thinks it is feezing cold and over fueling. Is it definately petrol on the plugs??? Remove all the plugs, burn them dry in the gas hob or something.
Remove fuel pump fuse and spin the engine over with the plus removed, are you getting much fuel out of the plug holes?? Leave for 15 mins or so to allow excess fuel to evaporate.
Refit plugs (don’t refit fuel pump fuse) crank over. Does it cough/try to start?? Recheck plugs – are they stil dry? If yes refit again, refit fuse and crank for a normal starting period, if it doesn’t even want to try to start check plugs again. If they are wet again then you are massively over fuelling, poss temp sensor.
If you have spark at the right time and and fuel of the right type/quantity then you have a mechanical problem. Are you sure the belt hasn’t jumped a tooth or two giving poor compression?Posted 4 years agomarkyboyMember
Sounds flooded.can be a nightmare to get going.remove plugs and fuel pump fuse crank over with plugs out to clear cylinders.clean plugs refit crank again with fuse still out should fire and die.then put fuse back in and try.also possible timing belt jumped a tooth.is it just a non start or did it cut out?Posted 4 years ago
So are the plugs not getting wet now? After you’ve been cranking does it smell petroley (not a real word) from the exhaust? Have you checked cam timing or just assuming it’s OK?
Does this mangement system have a cam position sensor as well as a CPS? If it does and you have no faults I would assume the belt hasn’t jumped at all.Posted 4 years ago
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