CDsDontBurn
Well-Known Member
Over the last month or so, my car has been acting a bit strange on startup. Normally, when the car is started the engine starts and maintains the 2k RPM for about two seconds or so and before dropping down to normal idle RPM, ~900RPM. However, on occasion, instead of the RPMs dropping, they go up to about 3,300RPM and hold there for about 5 seconds before dropping down to normal idle RPMs.
It doesn't always happen, but I've noticed it only happens when the engine is cold. I know that something like this is typical of the IAC vavle, but the one I have in there now is brand new. The only thing I can think of is that the coolant line going to the IAC valve is causing this to happen. The reason why I say this is because when I replaced the IAC valve, I also replaced the coolant line going to it with a generic hose from AutoZone. So, it wasn't molded to the correct shape like the OEM hose from Honda would be. Since it's not molded, the hose kinks a little bit which causes a restriction in coolant flow. That's the only thing I can think of, but I'm not sure if that indeed is the issue.
It doesn't always happen, but I've noticed it only happens when the engine is cold. I know that something like this is typical of the IAC vavle, but the one I have in there now is brand new. The only thing I can think of is that the coolant line going to the IAC valve is causing this to happen. The reason why I say this is because when I replaced the IAC valve, I also replaced the coolant line going to it with a generic hose from AutoZone. So, it wasn't molded to the correct shape like the OEM hose from Honda would be. Since it's not molded, the hose kinks a little bit which causes a restriction in coolant flow. That's the only thing I can think of, but I'm not sure if that indeed is the issue.