Info for everyone with accel problems

speadphreak · 01-03-2006, 10:18 PM

There seems to be an epidemic of acceleration problems with the vortec 5.7s. If your truck is experiencing acceleration problems and your check engine light is on and you have had the crank sensor and the cam sensor and the O2 sensors checked or replaced and you are still having issues have the gear on the ditributor checked apparently this is becoming an issue with later vortec 5.7s (the dealers always have them in stock wonder why) the gear can wear causing advance and retard issues with the timing it is easy to check and fix unfortunately it is not something that most mechanics check till they go through replacing everything else first. If your getting a p1345 cam crank correlation issue have them check the gear($16) before replacing the cam and crank sensors($155) or god forbid a hack tells you your timing chain and gears are shot( all possibilities for the code)

gmtech · 01-04-2006, 05:23 PM

Also Came Accross My First Rotor Plate Turning On The Shaft Of The Distributor Today. It Was On A 96 5.7r Engine Code 1354 Code Set Got It Up To Tdc Pulled The Dist Set It Correctly In Place Code Was Gone Ran Ok Then Reved The Engine A Couple Of Times And Code Came Back And Camshaft Ofset Started To Move.i Did Have 1 Distributor Gear Worn On One Of These Engines And It Would Loose Spark On Just Some Cylinders When Reving It Up And Only About Half Of The Gears Teeth Were Worn To A Point.

speadphreak · 01-04-2006, 06:24 PM

Oh yeah by the way the gear is $50 bucks not $16 the lady looked at the wrong price when I was on the phone I was slightly irratated when I showed up at the dealer and it was 3 times what they told me.

01-03-2006, 10:18 PM	#1
speadphreak Full Member Join Date: Dec 2005 Location: NW PA Posts: 37	Info for everyone with accel problems There seems to be an epidemic of acceleration problems with the vortec 5.7s. If your truck is experiencing acceleration problems and your check engine light is on and you have had the crank sensor and the cam sensor and the O2 sensors checked or replaced and you are still having issues have the gear on the ditributor checked apparently this is becoming an issue with later vortec 5.7s (the dealers always have them in stock wonder why) the gear can wear causing advance and retard issues with the timing it is easy to check and fix unfortunately it is not something that most mechanics check till they go through replacing everything else first. If your getting a p1345 cam crank correlation issue have them check the gear($16) before replacing the cam and crank sensors($155) or god forbid a hack tells you your timing chain and gears are shot( all possibilities for the code)

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01-04-2006, 05:23 PM	#2
gmtech Senior Member Join Date: Dec 2005 Location: farmville Va Posts: 348	Also Came Accross My First Rotor Plate Turning On The Shaft Of The Distributor Today. It Was On A 96 5.7r Engine Code 1354 Code Set Got It Up To Tdc Pulled The Dist Set It Correctly In Place Code Was Gone Ran Ok Then Reved The Engine A Couple Of Times And Code Came Back And Camshaft Ofset Started To Move.i Did Have 1 Distributor Gear Worn On One Of These Engines And It Would Loose Spark On Just Some Cylinders When Reving It Up And Only About Half Of The Gears Teeth Were Worn To A Point.

01-04-2006, 06:24 PM	#3
speadphreak Full Member Join Date: Dec 2005 Location: NW PA Posts: 37	Oh yeah by the way the gear is $50 bucks not $16 the lady looked at the wrong price when I was on the phone I was slightly irratated when I showed up at the dealer and it was 3 times what they told me.