question to whoever may have some advice
This is my second 850 ive owned. Ran great and went through state inspection with no problem. After about a week the check engine light came on, brought it to a shop for maintenance and diagnosis got a tune up (plugs, wires, and cap). As far as the check engine light they said that the error code coming up was an old error code and they reset it. Ran great for three days now light is on again. Some things ive noticed: Car warms quickly but temp g does not say it is overheating, fan kicks on in about one min of startup, suddenly runs rich and then will suddenly run weak with chance of stalling, can travel about four blocks and after shut off engine fan will continue to run for about 3 to 5 min. Any ideas kinda pissed off at my self for getting rid of my old one to have these problems with my new one.

Thanks

 

what's the code??