02-11-2017, 08:18 AM
As above, air leak is worth investigating first. Brake cleaner or carb cleaner are a good way of finding the rough location of a leak. The engine can burn either as a fuel which is why the rpm's rise when its drawn in through a leak.
BUT .....be really careful. Don't spray it around the bay when the engine is hot as it can be ignited by a hot exhaust!!
To check the ICV you can use a multimeter to check resistance across the pins. You should see approx 55 Ohms across either the two outer pins or the two inner pins. Also you can detach it from the throttle body but leave it plugged in. Get someone to turn the ignition key to its second position (without starting engine). You should see the ICV move. If no movement at all its stuck. If it does move it doesn't definitively tell you its not playing up tho.
BUT .....be really careful. Don't spray it around the bay when the engine is hot as it can be ignited by a hot exhaust!!
To check the ICV you can use a multimeter to check resistance across the pins. You should see approx 55 Ohms across either the two outer pins or the two inner pins. Also you can detach it from the throttle body but leave it plugged in. Get someone to turn the ignition key to its second position (without starting engine). You should see the ICV move. If no movement at all its stuck. If it does move it doesn't definitively tell you its not playing up tho.