87S4 update
10-24-2017, 08:27 PM
#1
Intermediate
Thread Starter
87S4 update
Hello all.
Just a wee update regarding my 87S4 auto.
Thanks to John Speake rebuilding the LH unit and exchanging the MAF, my S4 is running a lot better with much much more power. So a big thank you too him.
There are of course many more issues to resolve...how about this one...?
Fan blower never worked when i got the car but when the LH unit failed, and i was driving with the pump bridged, the blower would work on defrost mode. You could adjust the fan speed but then after a short time the fan came on full and could no longer be controlled by the fan speed switch. Magic blower syndrome i thought, however now that the pump is no longer bridged, the fan does not work on any setting. It does make a strange buzzing noise when it is switched on and the engine revs increase at idle. When the fan is turned off the engine revs decrease...
Any thoughts???
Kind regards.
Martin.
Just a wee update regarding my 87S4 auto.
Thanks to John Speake rebuilding the LH unit and exchanging the MAF, my S4 is running a lot better with much much more power. So a big thank you too him.
There are of course many more issues to resolve...how about this one...?
Fan blower never worked when i got the car but when the LH unit failed, and i was driving with the pump bridged, the blower would work on defrost mode. You could adjust the fan speed but then after a short time the fan came on full and could no longer be controlled by the fan speed switch. Magic blower syndrome i thought, however now that the pump is no longer bridged, the fan does not work on any setting. It does make a strange buzzing noise when it is switched on and the engine revs increase at idle. When the fan is turned off the engine revs decrease...
Any thoughts???
Kind regards.
Martin.
10-25-2017, 09:26 AM
#2
Team Owner
check the blower relay and HVAC relay swap them one at a time to verify operation