Question about 1991 Pontiac Grand Am

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1991 pontiac 2.5 tech 4 fuel pump relay wont energize

I changed cranksensor,ecm,ignition control module,fuel pump,fuel pump relay, the fuel pump will run when i jump the relay,I tried to start the car this way but fuel injection unit will not spray gas, if i ground the wire going to the ecm for the fuel injection it will open and spray,the car will fire up and run by spraying starter fluid so I believe something is preventing power going to the fuel pump relay coil, I checked it with a meter and ther is no power when key is turned on,and preventing the fuel injection from opening any insight on what to test or what may cause this would be helpfull

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Look for a bad fuse or relay. If both check out, most likely an ECM problem

Posted on Mar 07, 2009

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Which relay goes to the fuel pump on a 99 Buick LeSabre


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DTC P025A: Fuel Pump Flow Control Module Enable Circuit
The engine control module (ECM) supplies voltage to the fuel pump flow control module (FPCM) when the ECM detects that the ignition is on. The voltage from the ECM to the FPCM remains active for 2 seconds, unless the engine is in crank or run. While this voltage is being received, the FPCM closes the ground switch of the fuel pump and also supplies a varying voltage to the fuel tank pump module in order to maintain the desired fuel rail pressure.
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  4. ?‡'
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Here is the definition for the code.
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Read more: http://engine-codes.com/p0232.html#ixzz2KX7eZdtR

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Chevy Silverado 2002 2500 shows trouble code, P0230, and P0300


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62217_isuzfuse_1.jpg
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1 Answer

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Hope this helps, Sherwin

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