| Re: Running rich and hunting for idle |
Subject: Re: Running rich and hunting for idle by lunytnz on 2014/9/17 5:50:27 Quote:
I didn't pull the cap, but it (and the rotor) was replaced just 2 years ago. I moved some of the plug wires a bit, just in case, but no difference. I just checked for vacuum leaks by spraying carb cleaner around the intake and every vacuum hose I could find. No surges in engine speed. I suspect, since both 5 and 7 were equally fouled, that the rest are fouled, too. I'm sort of at a loss at this point... A few years ago, when the car failed emissions (high Hydrocarbons (of 450; limit 220)) at idle, a shop said a component of the A.I.R. system wasn't working right (the diverter or switching valve, I think), but also said a replacement part was not available. Even though it failed emissions, at idle, it idled and ran fine. So, if the valve isn't working right and there IS air to the ports in closed loop, that means it's potentially injecting air into the exhaust, right? How would air injected into the exhaust cause a high hydrocarbon reading at idle? |
