About Tim Expertise Any Toyota, especially Camry, Corolla, or Geo/Chev Prizm problems. Heavy experience with ECM,sensor,diagnostic issues, driveablilty, starting, fuel,charging, electrical, overall mechanical engine/transmission, and suspension problems. If I can't answer a question correctly in a timely manner I will search for the answer.
Experience I have 32 years experience in automotive field as a diagnostic technician. I analyze and correct problems on Toyota cars. I manage a car care organization for my church. The church has approximately 9000 members We provide diagnostic and repair services for low income individuals on a volunteer basis. I personally have owned and driven Toyotas for 27 years. My children, grandchildren, father and mother drive Toyotas. I have converted many friends to Toyotas.
Education/Credentials Unrelated; Computer Science Degree.
My experience has been self taught, always learning. I am not a parts replacer! I've seen way to many parts replaced by shops or individuals that don't have a clue, eventually I get called to resolve the issue. Most of the time its something simple like a bad ground, broken wire, gas cap, or dirty sensor(02 or MAF), etc.
Sensors are there to send a signal back to the computer that something is off slightly, that doesn't mean the sensor is bad!
Question Have a '96 Geo Prizm with a Corolla engine. Has over 100K miles. Initial problem was that car wouldn't start after filling with gas. Took home, replaced fuel pump, plugs and wires, but unsure if that fixed anything. Car will now idle and run perfect until the engine gets warm, which is sometimes about 5 minutes at idle or after driving it a ways. After the engine warms up, car misses at idle and doesn't go away. If you're driving along car seems to drive fine until you come to a stoplight when the engine cuts out and can die.
Answer This could be many things, is the engine light on?
A bad coolant temperature sensor would cause this type of issue.
First thing to do is retrace all your steps and closely inspect
all connections of wires and vacuum hoses under the hood, you
probably bumped something.
