Another test on our 420 sel,today I spent most of the day looking into the cleaning of and testing of the Icv,I found that with key on I had a pulse of 25 to 50 millivolts,I cleaned all dirt and grease from the valve,after replacing it and starting the car it would run up as it got its cold start shot of fuel and then would Idle down and stall,rpm would go to 700 then 500 and stall.Keeping you foot on the throttle at 1200 to 1500 and it ran till warmed after that it Idled but roughly. My next question is what should the reading be at the ICV,and what should the reading be at the plug wires.how many ohms should they read.
Vacuum lines,I plugged the main line from manifold to break booster made no diff.in the running of the engine. Well thanks for any help J-N-T