2005 Pontiac Grand Prix 3.8L
#1
2005 Pontiac Grand Prix 3.8L
Good morning guys
I am looking for information on the fuel system. Specifically the wire color and voltages that I should be getting at the bulkhead connection in the trunk. I have had multiple issues recently with the fuel system, the car threw some codes related to the MAP sensor, the MAF sensor and the TPS and once I got that fixed the fuel pump took a nose dive. I have since put in 3 new fuel pumps the first two were Carter fuel pumps. The last one is a Delphi and it does work, I confirmed that it does push fuel through the line. the minute I plug the fuel tank harness in to the bulkhead connector I get nothing.
At first (because of availability) I back probed the bulkhead connection with a powerprobe III and I got what sounds like data being sent or recieved. I check the same wire again and there is 5 volts but its not consistant.
Any help is greatly appreciated
Justin
I am looking for information on the fuel system. Specifically the wire color and voltages that I should be getting at the bulkhead connection in the trunk. I have had multiple issues recently with the fuel system, the car threw some codes related to the MAP sensor, the MAF sensor and the TPS and once I got that fixed the fuel pump took a nose dive. I have since put in 3 new fuel pumps the first two were Carter fuel pumps. The last one is a Delphi and it does work, I confirmed that it does push fuel through the line. the minute I plug the fuel tank harness in to the bulkhead connector I get nothing.
At first (because of availability) I back probed the bulkhead connection with a powerprobe III and I got what sounds like data being sent or recieved. I check the same wire again and there is 5 volts but its not consistant.
Any help is greatly appreciated
Justin
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CathedralCub (08-17-2023)
#2
Senior Member
Be nice to know the codes. What is fuel pressure?
A wiring diagram would be helpful.
A wiring diagram would be helpful.
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CathedralCub (08-17-2023)
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CathedralCub (08-17-2023)
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CathedralCub (08-17-2023)
#5
Senior Member
Those are not codes for your (any) vehicle. What tool?
What do you mean by direct voltage for fuel pressure. Put a gauge on that thing.
What do you mean by direct voltage for fuel pressure. Put a gauge on that thing.
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CathedralCub (08-17-2023)
#6
Senior Member
True Car Nut
I agree with carfixer007 ^^^^^^^
If I'm guessing right, you added an extra zero in the middle of those codes, so:
P01006 = P0106 = MAP sensor issue
P01008 = P0108 = MAP sensor issue
P03006 = P0306 = Misfire on cylinder 6
If I'm right about this, then these codes have nothing to do with a no fuel pump issue.
If I'm guessing right, you added an extra zero in the middle of those codes, so:
P01006 = P0106 = MAP sensor issue
P01008 = P0108 = MAP sensor issue
P03006 = P0306 = Misfire on cylinder 6
If I'm right about this, then these codes have nothing to do with a no fuel pump issue.
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CathedralCub (08-19-2023)
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CathedralCub (08-19-2023)
#9
Senior Member
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CathedralCub (08-19-2023)
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carfixer007 (08-20-2023),
CathedralCub (08-21-2023)
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