Mustang won't run

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aspiazug@aol.com - 06 Dec 2006 14:59 GMT

Hello I'm having trouble starting my mustang, I turn the key it starts
for about 2 seconds and then shuts down, but if I keep my foot on the
gas it'll stay running. I hooked up an OTC diagnostics scanner to it
and got some codes out of it, 15(KAM power failure) 95(fuel pump
secondary) 82 & 81(AM1&AM2 Power range) 54(ACT/VAT -40) and 23(TPS
Range, at maximum voltage) the car has a 1993 cobra computer in it. It
is a mass air car with 80mm mass air & 30lb injectors. It is a 351w
block. If anybody can help me with this please, I would Appreciate it
greatly. Thanks for your time.
-Greg

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Brent P - 06 Dec 2006 17:09 GMT

> Hello I'm having trouble starting my mustang, I turn the key it starts
> for about 2 seconds and then shuts down, but if I keep my foot on the
> gas it'll stay running.

That is the typical symptom of a dirty or failed idle air control valve.

> I hooked up an OTC diagnostics scanner to it
> and got some codes out of it, 15(KAM power failure) 95(fuel pump
> secondary) 82 & 81(AM1&AM2 Power range) 54(ACT/VAT -40) and 23(TPS
> Range, at maximum voltage) the car has a 1993 cobra computer in it. It
> is a mass air car with 80mm mass air & 30lb injectors. It is a 351w
> block.

http://autorepair.about.com/cs/troubleshooting/l/bl_dtcs_37a.htm

Code 81- Secondary -Air Injection Diverter (AIRD) solenoid circuit failure.
Code 82 Secondary Air Injection Bypass (AIRS) solenoid circuit failure.
Code 54 IAT Indicated -4000 (-40"F) /circuit open.

81 and 82 appear to be pointing the finger right at the idle air control
valve, unless I am reading it wrong. I am sure someone will say if I am.
The temp and fuel pump ones throw me a bit.

Since cleaning the IAC is 'free', my suggestion would be to clean it
with throttle body cleaner and see if there is an improvement. But given
that it actually threw a code, it might be an actual failed part.

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