Would a coolant temp sensor cause my eclipse 420a engine to run to much fuel?

Answer 1

i belive it definitely could - one of many possibilities - assuming that you are referring to a sensor that feeds info to the fuel injection computer. if it "thinks" the engine is cold it richens the mixture. usually these can be checked with an ohm meter to see if they are in the correct range at a given temp.

here is an additional thought. the "older" fuel injected cars had a separate cold start injector. they have their own temperature sensor. if you have a cold start injector on your system - you should check to make sure it is not leaking. that can cause over rich mixture. the cold start injector is supposed to open for a few seconds when you are cranking the engine - variable depending on the sensor temp - and then close tightly. the sensor has a timer built into it. make sure the sensor is working to spec - or it could be keeping the cold start injector open.

Answer 2

Most engine computers do not have a way to determine that the engine coolant temperature sensor is bad. When they are bad, the engine usually floods when trying to start it cold. The sensors don't usually cost much, but I don't have any experience with Mitsubishi engines or cars, but on a Chevy, they cost about $10.00. Hope it helps!

Answer 3

Replace the sensor since it's fairly inexpensive part and see if that helps.