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THE PCM IS ON THE PSSENGER FIREWALL THE PCM IS ON THE PSSENGER FIREWALL
PCM ( Powertrain Control Module )
The PCM on a 2003 Neon is between the radiator and the transmission under the hood.
The 2003 Chevrolet Malibu PCM valve can be found on the firewall in the engine compartment. The PCM valve will be on the passenger side of the firewall.
On a 2000 Lincoln LS : In the FRONT power distribution box ( which is " live " ) located in the engine compartment ( on the passenger side of the engine compartment ) ( relay # 14 is for the PCM power )
Behind passenger side kick panel
Here in Central New York, as of Nov 2012 rthe cost is around $100 just to flash the unit
Take it to a Ford dealership.
timing is set by pcm, at factory!!
according to mitchell ondemand its behind the glove box
There is not a cable for the speedometer. The information is sent to the gauge cluster from the PCM. The PCM controls almost all aspects of the vehicle operation. All of the information on the gauge cluster comes from the PCM.
There is a technical service bulletin for this problem. It's either the PCM (powertrain control module) or the Idle Air Control Valve