> Another problem spot when a car is running
> rich is to check out the FI temp sensor. If
> it is not functioning properly (ie. bad or
> bad connection which happens quite often on
> 20 yr. old cars) then the ECU thinks the
> engine is always cold and richens the
> mixture. I would look there first before
> pulling my AFM apart. Good luck!
I agree - see my posting under Daily Driver is Alive Again. Pull the engine temperature sensor. It is the smaller of the two two wire plug sensors on your thermostat housing. The large one is your thermotine switch which controls your cold start injector. You need to clean the corrosion off the connector where it connects to the sensor and about 12 away where it connects into the wiring harness with bayonet connectors. Mine was heavily corroded in both places. If the ECU get an infinite resistance (open) reading it will run your engine so rich it won't run. If the resistance is a bit high it will run the engine just a bit rich. If yu disconnect the sesor where it bayonets into the wiring harness and jumper the wires together, bypassing the sensor, it will think your engine is at normal running temperature (no resistance)and you'll run much leaner. It's a bit of a bugger to keep the engine running if you start it cold as then you won't get enough choke for normal warm-up but you should see a definite leaning of your mixture.
Hope this helps.
Phantom