TPS Test / Adjustment for a 1988 Auto 635csi
Posted: Mon Jan 14, 2019 12:38 am
Hello all,
I have an 88 635csi auto trans with a vin last 7 of 3266761 that I am having a shaky engine at cold start and smooths out a little when reaching operating temps. The TPS I have is the latest style round connector PN 13631708605 or as realoem calls throttle position switch. I cannot seem to find a test procedure specific to this style TPS. The car has no vacuum leaks and I just rebuilt the head and changed all gaskets and vacuum hoses. The car also has all new parts; cap, rotor, ignition wires, silver Bosch plugs, ICV, all new vacuum hoses and bellows. This is my 23rd BMW over the last 25 years. Before I jump into checking the AFM, I would like to check the TPS. I have a Bentley but this TPS does not appear to be covered. I checked this forum but the tps topics don’t seem to be referring to this TPS.
Any suggestions would be appreciated.
I have an 88 635csi auto trans with a vin last 7 of 3266761 that I am having a shaky engine at cold start and smooths out a little when reaching operating temps. The TPS I have is the latest style round connector PN 13631708605 or as realoem calls throttle position switch. I cannot seem to find a test procedure specific to this style TPS. The car has no vacuum leaks and I just rebuilt the head and changed all gaskets and vacuum hoses. The car also has all new parts; cap, rotor, ignition wires, silver Bosch plugs, ICV, all new vacuum hoses and bellows. This is my 23rd BMW over the last 25 years. Before I jump into checking the AFM, I would like to check the TPS. I have a Bentley but this TPS does not appear to be covered. I checked this forum but the tps topics don’t seem to be referring to this TPS.
Any suggestions would be appreciated.