- car runs great when cold for 10 minutes
- car runs sluggish when warmed up after 10-15 minutes of driving
- very low mpg (12mpg strictly city / 18mpg city/highway)
- when warmed up, car will run sluggish 1/2 throttle
- no check engine light
Ive changed out spark plugs, all 4 O2 sensors, fuel filter, added multiple fuel injector cleaners, cleaned out MAF, cleaned out idle control valve, and fuel pump with no avail. I was starting to give up hope and the last hope was the coolant temperature sensor. After i installed it, it ran like BRAND NEW! i suggest you guys replace this sensor if you experience the same symptoms or if its never been replaced before. So far it runs well and ill update the mpgs i get after i fill up again.
Its $20-30 at your local auto parts store. located here.
