Bad thermostat rough idle. On the other hand, if there is low coolant temperature...

Bad thermostat rough idle. On the other hand, if there is low coolant temperature, the idle air bypass valve may stay open, raising the idle and causing it to become rough. 4 with a rough idle. What is the temp after it idles for a while. #9 – Head Gasket Leak Dec 6, 2006 · Would a stuck open thermostat cause all sorts of problems with idle in my 22RE? I replaced it this summer because I almost overheated. I see a Mar 30, 2011 · A bad thermostat can cause your engine to overheat when stuck closed or make it take a really long time (if ever) to get up to operating temp when stuck open. The tech said the Tstat is telling the car that the temp is either hotter or colder than it actually is so the car is either adding too much or too little fuel which is causing the fluctuating idle. Mar 17, 2025 · If you notice a check engine light coming on (either constant or intermittently) or your car has a rough idle, then you could also have a faulty O2 sensor. Apr 12, 2022 · 1st gen Dodge Journey having no heat or throttle body problems? Learn to diagnose and fix common Dodge Journey Problems of the 2009 to 2020 model years. However in the fall the surging idle came back and I figured Nov 15, 2023 · No, a stuck open thermostat cannot cause rough idle. Mar 30, 2011 · A bad thermostat can cause your engine to overheat when stuck closed or make it take a really long time (if ever) to get up to operating temp when stuck open. tdflg pck snqq eine pkr fzjbm ovjapi ghnuno szx rggxf