The ABF in the mk1 is idling too high, when its cold it idles at 1000rpm and when warm it idles at 1500rpm... Now im sure that is the problem for it using so much petrol. How can these be adjusted, or is it a case of a sender to the ecu gone? Its running full abf management. Cheers
Thanks for replys guys, which one is the micro switch plate? the one that sits at the back of the throttle or front? Ive been told that the temp sender may be gone, is this right? Cheers
the throttle closed microswitch is at the back. It's a switch on a plate, the plate is slotted and when adjusted it physically pushes the throttle open or closed.
For optimum running it's a good idea to change the temp sensor anyway, they do seem to be going at this age. 2 pin white I believe is what you need. GSF don't do them. VW do them for I think 26 I paid.
needs to be vagcom'd really unless you can test each sensor. i posted up a thread ages ago with the specs for each sensor to test you getting 5v etc across the loom etc? no chance of vac leaks?
ECU temp sensor can't really be tested if its not throwing a fault in VAG-COM, its possible for them to return values in the range you expect but still be buggered. Just get a new one if you suspect it is dead Did you block off all the extra vac conenctions on the side of the throttle body?
Yeah, my mechanic friend super Bob said it makes a lot more sense to get a new one for 26 from VW than to test the old one
the sensor can. i posted up tables ages ago with the resistance/temp things for the coolant sensor http://evoposters.net/gallery/main.php?g2_itemId=190277 on vagcom, if you look at the measuring blocks, there is one for the coolant temp. if yours is up to full temp and vagcom says 20* then there is clearly a prob
Thanks for all replys, All the vac connections are blocked and doubled checked. Im picking up a new temp sender today as you guys say its worth changing anyways.... I have changed the idle control valve recently which stopped my cutting out at idle problem but since then it is idling high.... Im not sure which car the replacement control valve was off, as the guy at scrappy didnt have part number for it. Could this be the problem? Does anyone have the part number for a ABF idle control valve? Cheers
giz the part number from what you got, the ABF one should be 037 906 457D, listed for: 89-95 Corrado 1.8 G60/16v Golf MK2 8v GTI/G60 Golf MK3 ABF Passat 1.8 16v/2.0 ABF
Cheers, Will look at part number later... i think he said it might be off a mk2 gti. would that make the difference?
Sounds good then but i will check part number later as im not 100% sure it is off a mk2 gti. Would a different ISV be the problem?
That is a good question, I'm not sure if the different part numbers mean a different throughput, or if they are just able to cope with a wider range of inputs, etc etc. The interesting thing is the MK2 16v ISV has a different part # to the Passat & Rado ISV, even though they're the same engine!
Sounds bit odd, after searching on here people say they have been using mk2 8v ISV's on the ABF engines with no problems.... So why would a mk2 16v be any different! Can get confusing
Problem solved..... Put new temp sender in and changed ISV for a different one. How ever the old ISV was from an ABF engine, maybe it was faulty then. Thanks for the help guys.
