Duramax Diesels Forum Truck of the Week
  #1  
Old 03-21-2010, 07:08 PM
backtanner backtanner is offline
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Default Fuel pump

02 2500 sputtered and died with no restart. Fuel supply shows psi of 4-5. Turning key to run does not get buzz from fuel pump (i assume). If it is pump where is it located? Checked autozone's site and looks like might be mounted to frame rail. One they gave was included with sending unit assy? Which is correct and if this is the problem what is the best course to get at this thing? Drop the tank or unbolt and slide bed back? Thanks all.
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Old 03-21-2010, 07:14 PM
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rgullett83 rgullett83 is offline
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Need more info. Is this a Duramax?
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Old 03-21-2010, 07:26 PM
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If it is a gasser drop the tank or remove the bed.I would use a DELPHI fuel pump,i have had to many problems with AIRTEX,CARTER,ETC.
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Old 03-21-2010, 08:05 PM
backtanner backtanner is offline
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Yep it's the dmax
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Old 03-21-2010, 08:19 PM
maxaholic maxaholic is offline
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There is no lift pump on a dmax. Unless you have added an aftermarket.
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Old 03-21-2010, 08:27 PM
backtanner backtanner is offline
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With that being said, what is the buzz that previously accompanied the key turned to the run position?
Also (and I know it is Autozone ) why do they show this pump listed?http://www.autozone.com/autozone/cat...&parentId=49-0
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Old 03-22-2010, 04:51 PM
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i would crawl underneath and look on the inside of the frame under the driver's side and look to see what's been put under there
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Old 03-22-2010, 07:06 PM
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How many miles do you have on your truck and have you had the injectors replaced yet?

My 02 did a similar thing. Mechanic I had at the time replaced the fuel pickup in the tank (really didn't know what he was doing). Ran for less than two weeks and stopped running again (don't ask because I don't understand it either). Took it to the dealer and found out one of the injectors was bad. Dealer went ahead and replaced all eight.
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Old 03-23-2010, 06:16 PM
backtanner backtanner is offline
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303k. With injectors being done about 15k ago.
Cranked the engine with the plunger on the fuel test port depressed and only got a gurgle. Am I correct in thinking that it should have squirted out of there like a porn star?
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Old 03-23-2010, 06:22 PM
KEVINL KEVINL is offline
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I think The test port is the vacuum side
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Old 03-23-2010, 06:25 PM
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If you pump the heck out of the primer, there should be pressure at the port, however when the engine is running, it will be vacuum.
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Old 03-23-2010, 06:26 PM
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Quote:
Originally Posted by KEVINL View Post
I think The test port is the vacuum side
Yes it is.
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Old 03-23-2010, 06:27 PM
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Vrabel Vrabel is offline
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Posible bad plunger/primer. leaking in air?
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Old 03-23-2010, 06:27 PM
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ZeroGravity58 ZeroGravity58 is offline
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Quote:
Originally Posted by backtanner View Post
303k. With injectors being done about 15k ago.
Cranked the engine with the plunger on the fuel test port depressed and only got a gurgle. Am I correct in thinking that it should have squirted out of there like a porn star?
No, there is no fuel pump in the tank to create pressure to push fuel out of the test port. Only way you will get fuel out of the test port is if you have added an aftermarket lift pump. The fuel test port is on the vacuum side of the CP3 so by depressing it and trying to crank the truck you will just allow air into the system.
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  #15  
Old 03-27-2010, 09:30 PM
backtanner backtanner is offline
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I get fuel to the filter assy by way of the primer, but after 2 mins of pressing the primer button it still does not stiffen up. Is this normal? If not, what would it be indicative of? I would really like to rule out the CP3 if possible. Possible?
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