You are here:

Cadillac Repair/Engine Idle Sensor


Engine Idle Sensor.jpg
Engine Idle Sensor.jpg  
Hi Rob,
I have a 1979 Cadillac Eldo Biarritz. The engine races when I start it and when in park. I have twice ordered an engine idle sensor from Cadillac King in California and twice they have sent me the part, on which the plunger is fixed with epoxy. Is it supposed to be this way? My mechanic says no - you should be able to adjust it to the particular car.


Its been a very ong time since I dealt with TBI but I knew the part you are referring to as an ICS or idle ontrol solenoid. We also called it a stepper motor because it had steps in it for adjustment. I would have to agree with your mechanic on this one.

Call the compay and ask them what thier story is.

God luck.


Cadillac Repair

All Answers

Answers by Expert:

Ask Experts


Rob Painter


Alarm system questions cannot be answered on this forum. These systems are not what I can answer. Without being physically at the vehicle and not knowing what kind of electrical service has been done on the vehicle, there is no possible way to give an accurate answer over the internet. My expertise is in Ignition/key based anti-theft systems. These issues include GM VATS (resistor chip in key blade) PASSLOCK (MRD)-ignition lock rotation based, no special ignition key and the PKIII Transponder (computer chip in key) systems. These systems are not alarm based and are integral with the starting of the engine. This is why I cannot diagnose alarm problems without physically looking at the vehicle: Alarm systems are a completely different annimal than ignition key/lock based anti-theft system. Many alarm questions come from vehicles 10 years old, and since older, many hands that had been involved over the years.I am an expert in all GM factory (ignition/key based)systems. Alarm system questions pose to many situations beyond my knowledge as to what has been done to the vehicle over the years. Some guy may have actually wired the stereo into the alarm system. Who knows? Over my past 30 years in vehicle wiring repair, I have seen unbelievable wiring disaters done by guys that consider themselves "mechanics." I have seen stereos and alarms intalled using surgical tape. I have seen modules burn up, un-fused circuits, wiring jambed between the doors and even lamp cord used for a starter kill. To answer alarm questions over the internet without examining the vehicle is like asking; What does it take to remove a dent?


Education/Credentials-ASE certified. 11 years with a GM dealer and 17 years with a repair facility dealing with only the repair of theft recovered vehicles.

©2017 All rights reserved.