Mk 3 16V Loss of ignition

[j sizzle]

Hi,

I've got an 97 Mk3 16V with a pain of a problem. The oil temp goes up to about 96 (which I believe is too high) and then the revs will flucuate and ignition is totally lost (I know this because someone connected a VAG diagnostic scanner to it). Once things have cooled down a bit it is fine to drive again. Has anyone had a similar problem? The crank sensor has been recently changed. My local specialist is at a bit of a loss to explain the problem.

To be honest it's doing my swede in a bit especially as I've only had the car for a few weeks and can't use it properly. Any help or suggestions (apart from selling it!!) would be much appreciated. Cheers

[Wayne]

Not sure on your problem but 96 is not that high, my 8v always was around 95

[danny_p]

fluctuating revs is normaly cranck sensor.    possoblity of it been hall sensor in dizzy. 

is it misfireing at all ?  if it is chould be the coilpack

[rubjonny]

when you say ignition is lost, do you meanengine spark cuts out or you loose ign live feed completly to car?

[j sizzle]

Thanks for the replies. The crank sensor and the coil pack have been changed. It seems to be a temperature thing (after reading some other threads I now see that 96 isn't that high!) There is no spark to the engine when it occurs. To change the hall sensor will I need a whole new dizzy?

[danny_p]

plug laptop into the obd port and ask it whts wrong  may give usefull clue

[rubjonny]

ok next time it does it check for 12v at the black wire to the coil with the ignition on