2001 Chevy Suburban fuel pump primary

Tiny
JARRETTW
  • MEMBER
  • 2001 CHEVROLET SUBURBAN
  • V8
  • 2WD
  • AUTOMATIC
  • 115,000 MILES
I used a actron auto scanner and it says fuel pump primary circuit malfunction. What would cause this. The vehicle runs rough an will not hardly idol, but these problems did not occur until I changed spark plug and plug wires and one of them came off when my wife went to town the next day. But the only codeit gives is the one I mentioned above.
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Monday, August 3rd, 2009 AT 7:31 PM

5 Replies

Tiny
IMPALASS
  • EXPERT
Hello -

To better assist you is your model a C1500, C2500 or K1500 or K2500? Also please tell me your engine size in liter.

Also please tell me the 8th digit of your VIN.
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Monday, August 3rd, 2009 AT 11:20 PM
Tiny
JARRETTW
  • MEMBER
It is a C1500, 5.3 liter engine, and the 8th vin letter is T. I also don't remember if I said in my question, but I already changed the fuel pump.
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Tuesday, August 4th, 2009 AT 11:34 AM
Tiny
IMPALASS
  • EXPERT
Hello -

Thanks for the info.

Okay. First since there are so many codes I will need the code number. Can you get that for me? If you had to borrow the scanner then please go to Auto Zone (AZ) or O'Reilly's (OR) and use their tool check out program and get the code scanner. Check your codes, if you find something and you don't get it fixed and need to get back with us, please make sure you tell us exactly what the code was, number and all. Example, if the code was E0568 O2 Sensor bad. Then make sure you give us all of that. Then make sure you give us all of that. While there for FREE also they can bring their tester out and check your battery and alternator.

Let's check the electrical system out while there and it is free.

Next, are you sure all the plugs are in tight and the plug wires connected good and tight?

What plugs did you use? Many times it is best to use the OEM ones.

Next, take a spray bottle of water and start the engine. Then spray a mist of water all over the plug wires and see how the engine reacts.

Are you sure you have the wires in the correct order and again, they are making good contact?

What type of plug wires did you use?

Did you look at your coils really good for any damage and are those wires seated properly.

Does it idle rough in just Park, or also in drive and neutral
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Tuesday, August 4th, 2009 AT 8:24 PM
Tiny
JARRETTW
  • MEMBER
It dies when I put it in drive. I can rev the engine and it runs fine but when I let off the gas it almost dies runs rough again. I will have to get the code and get it to you.
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Tuesday, August 4th, 2009 AT 11:05 PM
Tiny
JARRETTW
  • MEMBER
The code that comes up is P0230. Also I was working on it yesterday and when I turn key on the tube that the injectors get the fuel out off you can hear fuel spraying in it non stop.I waited like 3 minutes and the fuel pump never quite pumping.
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Wednesday, August 5th, 2009 AT 7:35 AM

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