For the past month, my LC has been running a bit rough on idle, and I have been doing my detective work in trying to figure out the cause.
I've replaced the spark plugs, spark plug wires, dizzy cap, rotor with OEM parts, but no luck. I checked the injectors, wiring harness, checked if there were any combustion gases in my coolant system, did a compression test and all came back good... Brought it to 2 local shops to get a second opinion and they could not find the cause of the issue.
The weird thing is that it only idles poorly and misfires when my idle RPM hits 650(warmed up) or when my drive idle(at a light or stop sign) hits 600. If I turn the AC on to bump up the idle RPM greater than 800, it runs perfectly without any issues--no hesitations, rumbling or misfires. Other than this issue, it runs totally fine on the road.
I'm starting to think it's a vacuum leak and ordered some new parts to replace those, but is there anything else that I should look at? Possibly the IAC or something else? This rabbit hole is getting deep so any and all thoughts would be greatly appreciated. Thanks
I've replaced the spark plugs, spark plug wires, dizzy cap, rotor with OEM parts, but no luck. I checked the injectors, wiring harness, checked if there were any combustion gases in my coolant system, did a compression test and all came back good... Brought it to 2 local shops to get a second opinion and they could not find the cause of the issue.
The weird thing is that it only idles poorly and misfires when my idle RPM hits 650(warmed up) or when my drive idle(at a light or stop sign) hits 600. If I turn the AC on to bump up the idle RPM greater than 800, it runs perfectly without any issues--no hesitations, rumbling or misfires. Other than this issue, it runs totally fine on the road.
I'm starting to think it's a vacuum leak and ordered some new parts to replace those, but is there anything else that I should look at? Possibly the IAC or something else? This rabbit hole is getting deep so any and all thoughts would be greatly appreciated. Thanks