Blueduck
Newbie
Looking for some help with a strange issue with 1997 gmc Sierra c2500 2wd with a 5.7
Drove into town yesterday evening..truck started and ran fine. Turned it off went into store came out cranked it and it fired and ran for about 2 seconds then died. After that I had a no start issue while in the parking lot. Had to get towed home. Once home (about hour later) I hook up my fuel pressure gauge and key on primes at 62 psi. 60 psi after prime. Holds fine. I cranked her over and she fired right up but fuel pressure instantly dropped from around 55 to 10 in around 12 seconds resulting in the engine dying. I reproduced this several times last night. Checked for fuel leaks found none. Figured pressure regulator took a crap. Went to work today...got home Went to the shop and truck fires right up. Over and over again. I check pressure. 62 psi while priming. 60 psi key on engine off. 56 psi at idle. Hits 62 psi instantly with blip of throttle. Drove it around the property..got it up to Temps. I cannot reproduce the symptoms I had yesterday. I'm stumped.
No CEL
New Delphi fuel pump installed 14 months ago along with new fuel filter and pressure regulator. (Went bad)
Upgraded spider injection installed by shop around 4 years ago by previous owner (my father) when I was changing out the pressure regulator I checked the numbers on the spider unit and unfortunately it's a cheap ebay unit. I really wanted to change it out but couldn't find a Delco or Delphi unit in stock Anywhere!
Any advise/ideas on what's going on is much appreciated. Thanks in advance!
Drove into town yesterday evening..truck started and ran fine. Turned it off went into store came out cranked it and it fired and ran for about 2 seconds then died. After that I had a no start issue while in the parking lot. Had to get towed home. Once home (about hour later) I hook up my fuel pressure gauge and key on primes at 62 psi. 60 psi after prime. Holds fine. I cranked her over and she fired right up but fuel pressure instantly dropped from around 55 to 10 in around 12 seconds resulting in the engine dying. I reproduced this several times last night. Checked for fuel leaks found none. Figured pressure regulator took a crap. Went to work today...got home Went to the shop and truck fires right up. Over and over again. I check pressure. 62 psi while priming. 60 psi key on engine off. 56 psi at idle. Hits 62 psi instantly with blip of throttle. Drove it around the property..got it up to Temps. I cannot reproduce the symptoms I had yesterday. I'm stumped.
No CEL
New Delphi fuel pump installed 14 months ago along with new fuel filter and pressure regulator. (Went bad)
Upgraded spider injection installed by shop around 4 years ago by previous owner (my father) when I was changing out the pressure regulator I checked the numbers on the spider unit and unfortunately it's a cheap ebay unit. I really wanted to change it out but couldn't find a Delco or Delphi unit in stock Anywhere!
Any advise/ideas on what's going on is much appreciated. Thanks in advance!