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Camshaft to crankshaft position fault
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sbourquin
New User
Aug 8, 2010, 12:58 PM
Post #1 of 6
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Camshaft to crankshaft position fault
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I have a 1997 GMC 1500 2 wheel drive ext. cab truck
Sierra with 5.0 V-8 SFI engine. Mileage is 165,000.
Service engine soon light is reading a code P1345
Camshaft to crankshaft position correlation fault.
I can not get the code to stay cleared. A local
service center replace the camshaft sensor. This
did not take care of the problem. 12 months ago
I had a fuel pump replaced and the mechanic re
stabbed the distributor. He stated that the timing
was off and he could not get the engine to crank.
The manual states that their is no timing adjustment
on SFI engines. What will correct the problem.
The truck runs and starts with out any problems.
Performance and fuel economy is fine. I can not
get the vehicle safety inspected until I get the
service engine soon light extinguished.
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Sidom
Veteran
/ Moderator
Aug 8, 2010, 2:45 PM
Post #2 of 6
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Re: Camshaft to crankshaft position fault
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There is no timing adjustment in the conventional sense but there is an adjustment for the cam timing and when it gets too far out, it will set that code.
It will take a scan tool that shows a "CAM RETARD" pid. You need to get this adjustment as close to zero as possible. When turning the dist to change the adjustment, you need to snap the throttle so the new reading shows up on the pid
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 8, 2010, 2:50 PM
Post #3 of 6
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Re: Camshaft to crankshaft position fault
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Yep, everybody makes that mistake. Once you turn that distributor, you need a scan tool to get it right again. Any more than 4 degrees off and it sets that code.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Sidom
Veteran
/ Moderator
Aug 8, 2010, 3:01 PM
Post #4 of 6
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Re: Camshaft to crankshaft position fault
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I'm not sure what all has been changed but if the housing is still factory he has one small hope.
I've notice some of those come with a white line on the dist & manifold from the factory (you need a mirror to see it cuz it's on the backside), just line up the 2 marks and it gets it close enough to keep the light off once cleared....
No marks & you're screwed. A scan tool is the only way
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wayneb
New User
Aug 16, 2010, 7:05 PM
Post #5 of 6
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Re: Camshaft to crankshaft position fault
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had this same problem with m y 98 suburban 7.4 it turned out that the distubiter had play in it the bushings where bad
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sbourquin
New User
Aug 16, 2010, 7:30 PM
Post #6 of 6
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Re: Camshaft to crankshaft position fault
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Thanks for the info. I got it scanned
today and inspected today. I did have
a second code of P0175 however we ran
some LUCAS for 50 miles and the check
engine light cleared...
Thanks again...
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