it just wont idle

[aaand]

how do i reset the idle? i am not mechanicly miinded and ned help, my idleing is  rubbish,have replaced isv and not really any better, where is the blue sencer chip thing???  i have 8 valve 89 gti

[...joe]

its on the front of the block on top of a black plastic housing with two water hoses going into it. check for any leaks round the crankcase breather bung (the flat, round thing on top of the rocker cover) it might well help to take off all the hoses connecting the ISV to the inlet and clean them out and possibly the throttle body with carb cleaner. then once everything is how it should be get the car running up to temperature (till the fan kicks in) then remove the blue plug from the temp sender, rev the car over 3k letting it drop to idle then you can adjust the idle speed with the little flat head screw in the throttle body. switch off, re connect the blue plug, wait a minute and start it up again. it 'should' be fine!

[aaand]

nice one mate, will try this in the morning , im hopeing this is going to work, thank you very much

[...joe]

no worries! digifants are annoying when things like this happen as they rely on so many sensors etc unlike the mechanical earlier version....

[aaand]

tell me bout it,  its been driving me mad for ages  ive read  through the hayns man, ut  some of it i just dont get, also would i need to adjust the  co content screw?? would this help the idleing?

[...joe]

not really and its easy to screw it up with out a proper way to measure the co2 levels.

[AudiA8Quattro]

CO and idle should be both adjusted together, not one without the other(well thats the theory  ).I think i am right in thinking the early digifant systems are adjustable.
Basically get all the basics checked, idle, co, ignition timing, check for vacuum leaks.

[aaand]

did all that and still idles really rich, i  was messing around with some switches at the back of the throttle body ( think it is the chock) and when pulled the wires it idled fine, so seems to be somethig to do with this,  can i just disconect it, will it make a diference ??

[AudiA8Quattro]

Try replacing it.

[aaand]

yeah will tomorow,