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Fuel Pump Stays running

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Fuel Pump Stays running

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  #11  
Old 12-26-2012, 04:10 PM
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jumped fuse 10 + 11 and got poser to dash warning lights, checked fuel pressure with guage on the rail, and it read 60 something with key on engine off, still wouldnt start tho. is there another place to look for ignition? i dont know if i have spark yet, but im guessing no since its not running.
 
  #12  
Old 12-26-2012, 05:24 PM
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When the ignition is initially turned to the on position, (engine off) the fuel pump should come on for ~2 seconds and shut off. It is controlled by the PCM. The fuel pump should run continuously while cranking, and when the engine is running. When the ignition is turned to the off position, the fuel pump should run for ~2 seconds, and then shut off.

1996 & 1997 oil pressure sending units have a circuit that provides an additional path for amperage to flow to the fuel pump when oil pressure is above ~7psi.** If the fuel pump continues to run longer than ~2 seconds after the ignition is turned off, the oil pressure sending unit is probably sticking and needs replacement. You can verify this very easily: With the engine running at idle, unplug the electrical connector from the oil pressure sending unit, (fuel pump will remain running). Turn the ignition off, and the fuel pump should stop within ~2 seconds.


** This circuit does not control the fuel pump. It is not a "safety feature" that will shut off the fuel pump if oil pressure drops below ~7psi.
 
  #13  
Old 12-26-2012, 05:44 PM
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Originally Posted by Captain Hook View Post
When the ignition is initially turned to the on position, (engine off) the fuel pump should come on for ~2 seconds and shut off. It is controlled by the PCM. The fuel pump should run continuously while cranking, and when the engine is running. When the ignition is turned to the off position, the fuel pump should run for ~2 seconds, and then shut off.

1996 & 1997 oil pressure sending units have a circuit that provides an additional path for amperage to flow to the fuel pump when oil pressure is above ~7psi.** If the fuel pump continues to run longer than ~2 seconds after the ignition is turned off, the oil pressure sending unit is probably sticking and needs replacement. You can verify this very easily: With the engine running at idle, unplug the electrical connector from the oil pressure sending unit, (fuel pump will remain running). Turn the ignition off, and the fuel pump should stop within ~2 seconds.


** This circuit does not control the fuel pump. It is not a "safety feature" that will shut off the fuel pump if oil pressure drops below ~7psi.
well heck i got the cover off the lower ignition, looked around didnt do anyting in there yet, but i jumped the fuses again and it started up! i dont know what the deal is. so i shut it off then it wouldnt restart, im wondering if my battery is just to low to start it. will try again with the battery on the booster later.

P.S i broke my tilt lever pulling it to get it out! anyone got a extra?

also its t-20 torx to get the lower cover off.
 
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