Tuesday, November 12th, 2019 AT 6:13 PM
Stumped on this. Car starts fine in open loop; idle is slightly high around 1,000 rpm's (before this problem occurred it would be around 750-InSpecs). After running the car until closed loop happens the car will idle up and down from 1,000 to 1,250-1,500 rpm's. The car started throwing the code p0505 idle air control valve system failure. I checked the battery reference which is 11.69 volts for a 12v ref wire. Continuity from battery ground to ground terminal was 1.6 ohms and the signal wire has a resistance of 56.97k Ohms. I could not find a spec for the signal wire resistance. I replaced the valve and the problem still is occurring. Old valve only had continuity between pins 1-2 the new has continuity between 1-2 and 1-3. After smoking the engine (cold) the evap valve is the only slight vacuum leak however this isn’t throwing a code at all. At the same time this started happening my heat also stopped functioning. Any possible leads or advice?