Hi,
I have a 2006 Mazda Tribute (same engine as the Ford Escape), 4 cylinder, with 142k miles. It’s been idling rough with noticeable vibration at red lights. No problems when driving. The vibration goes away when I shift into neutral, reverse, or park. I spray cleaned a bunch of carbon off the throttle body hoping that would fix it. Sadly, no luck. I replaced the spark plugs (but not the ignition coils) about 4 months ago too. I have read that maybe the IAC valve could be the culprit.
What other things could cause this? Anything else I should be thinking about?
Thanks for the help. Love what you’re doing.
-Grant
What other things could cause this? Anything else I should be thinking about?
About a bazillion things.
How old are your air and fuel filters? Your spark plugs? Have you checked for vacuum leaks? Scanned for codes and live data?
What does your scan tool show? If you don't have a scan tool, consider buying one. I bought mine at AutoZone for $100 and it has ABS capability.
