My '91Grand Am (2.5L vin U), with 103k miles has a check engine light. Checking the code is rich exchaust. Fuel consumption is high, about 18 mpg instead of normal 27 mpg. Since the weather is warmer the engine runs a lot hotter than normal (it used to do that only in 90+ degree weather). Looking at the symptoms, it seems that the car gets too much gas in the engine. This could be many things, but I was thinking to try the Coolant Temperature Sensor first. This only makes sense if the temperature gauge inside is linked with another Sensor, since this gauge seems to work fine. My question is if this is true and if there are some other possibilities that I am missing. Thanks in advance!
- posted
19 years ago