Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

95 GMC 6.5 runs for 10 sec. then stalls and wont start

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  #11  
Old 03-09-2011, 12:25 AM
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no it wont it would still start but take forever check your fuel filter housing for leaks we couldnt figure out the problem on mine and put the new style filter on and there was a metal ring not letting it seal and letting air in the system it had the same symtoms as yours so check for that with a pmd relocated that shouldnt be the problem they dont go bad overnight
hope this helps you
 
  #12  
Old 03-09-2011, 12:40 AM
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I have a newer style filter from SSD, I did crack the bleeder today and got some air, But I just installed the filter , it only has about 30 seconds actual run time on it. I changed it as soon as It started the shutting off. I cranked the engine until I got 100% fuel out of the bleeder. I noticed the fuel doesnt come out as much when the pump is running without cranking the motor. I put the trans in drive and turned the key to start, I got fuel but only 1/2 as much as when I cranked the motor.
 
  #13  
Old 03-09-2011, 02:10 AM
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only thing i can think of now is is the lift pump running at full power and can you feel it running
 
  #14  
Old 03-09-2011, 02:27 PM
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Im gonna try the PMD when it arrives, if that doesnt work, I think I'm gonna get a new LP. I just dont like how the pump sounds. It normally wouldnt concern me but it sounds different than it did in the past.
 
  #15  
Old 03-09-2011, 03:10 PM
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Witemanfromhil

Did you put 12V right to the LP and check see if the truck would start i seen many pump run but fail to fuel the parts in side the pump that move the fuel falls apart and pump motor will still run
 
  #16  
Old 03-09-2011, 09:35 PM
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Today I removed the pump and bench tested it, pump works fine, pumps good fuel, has 12v at the plug. When I reinstalled it the pump runs much quiter than before, I can bearly hear it inside the cab. Could this be a problem?
 
  #17  
Old 03-10-2011, 07:49 PM
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Hi,
Did you recieve the PMD yet??If so,try it out,make sure the chip is installed in the PMD.It is located in the PMD where your harness connects into it.Use the one off the old PMD if it did not come with one.If the truck still does the same thing,I have a few tests you can do if you have a voltmeter,these tests need to be performed when the truck will not start,so you need to have meter handy.We will beable to atleast prove your control ckt from the main brain (the PCM) to the PMD which controls your injection pump.It is also helpfull if you have your fault codes read so we know what direction to start in.
Big Joe
 
  #18  
Old 03-11-2011, 09:54 PM
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I didnt get the PMD yet, actually they sent me the wrong part. "BIG JOE" After reading your last reply about the resistor, I checked mine and it didnt have one in it, I I got to looking and neither did the last one(pmd) I replaced. could this be part of my problem? I did order one from Walt today.
 
  #19  
Old 03-11-2011, 09:59 PM
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yes that could be your problem very much autozone does sell them also now for like $30.00 and it come with #er 5 and 9
 
  #20  
Old 03-13-2011, 10:27 AM
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If trere is no resistor in the pmd, the ecm assumes it to be the equivelent of a #1 or 5 (I don't remember which) but it doesn't affect the operation of the pmd.
 



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