Idle Air Valve Test
Вставка
- Опубліковано 11 вер 2024
- Mercedes 1983 R107 380SL
I quickly tested my idle air valve before it gets reinstalled in the car
The test is inspired on this longer instruction video from Inova Hightech: • Mercedes W126 all MY 4...
00:28 idle air valve fully closed
Music:
- Observer - Chasms
Hi, I’m getting a high idle around 1200 at operating temperature. I cleaned and checked the valve, it closes with a 9 volt battery and I read about 4volts at the terminals with the engine running. I’m trying to decide between a faulty valve or a bad ignition control module. Do you have any suggestions on testing to determine which may be faulty? Thanks!
Hi Peter, as it sounds like your valve is working, you could try disconnecting it while the engine is idling. If nothing changes, this could indicate no signal is coming to the valve, i.e a bad icu, or bad cabling between icu and the valve. You can also measure the signal coming from the ICU; it is a complex modulated signal, but if you measure no potential at all, that is another indication the icu might be bad. If you have a power supply with current control (as in the video), you could connect that to the valve (ICU disconnected) and gradually close it while the car is idling, the rpm should decrease then. If not, you might have an air leak elsewhere in the system. Success
Thanks for the reply. I’m borrowing a variable voltage and amp meter and I’m going to test the valve. I tested it on the car I got about 4.5 volts at the valve and 180 mA. This is at operating temperature. Cold it showed 480mA and voltage up to 4.6V.
I’m suspecting the valve. The voltage is in range but the amps are not. I cleaned the Icv by soaking it in carburetor cleaner and sonicating at 60C.
Thanks for the reply. I’m borrowing a variable voltage and amp meter and I’m going to test the valve. I tested it on the car I got about 4.5 volts at the valve and 180 mA. This is at operating temperature. Cold it showed 480mA and voltage up to 4.6V.
I’m suspecting the valve. The voltage is in range but the amps are not. I cleaned the Icv by soaking it in carburetor cleaner and sonicating at 60C.
Thanks for the reply. I’m borrowing a variable voltage and amp meter and I’m going to test the valve. I tested it on the car I got about 4.5 volts at the valve and 180 mA. This is at operating temperature. Cold it showed 480mA and voltage up to 4.6V.
I’m suspecting the valve. The voltage is in range but the amps are not. I cleaned the Icv by soaking it in carburetor cleaner and sonicating at 60C.
Thanks for the reply. I’m borrowing a variable voltage and amp meter and I’m going to test the valve. I tested it on the car I got about 4.5 volts at the valve and 180 mA. This is at operating temperature. Cold it showed 480mA and voltage up to 4.6V.
I’m suspecting the valve. The voltage is in range but the amps are not. I cleaned the Icv by soaking it in carburetor cleaner and sonicating at 60C.
Bravo za rad i za trud