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Old August 10th, 2015, 7:01 PM
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P1345 Code, cam/crankshaft positioning sensor timing off.

Old February 12th, 2019, 2:50 PM
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Originally Posted by Chuck1975 View Post
hello anyone. New member here. I just put a professionally rebuilt 5.0 liter engine in my 1996 K 1500. I'm getting the 1345 code. I can't see where there is any camshaft position sensor, it's simply not there. I have put a new crank position sensor in it, along with every other sensor on the engine. Have spent more on parts and sensors, then the rebuilt engine cost. Truck starts, but it runs not very well. Don't want to have to take it to the dealer.
Chuck1975 the camshaft sensor is in the distributor. I have a freshly rebuilt 350 in my 97 C1500, and I知 getting that code too. So for now I知 kind ruling out that it may be any of the timing chain components, considering that it was professionally rebuilt. I need a new distributor anyway so I知 gonna put a new one in along with a new crankshaft sensor and see if that code clears after that.
Following any progress you make with your 96.
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Old February 12th, 2019, 4:10 PM
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Originally Posted by Montana Bass View Post


Chuck1975 the camshaft sensor is in the distributor. I have a freshly rebuilt 350 in my 97 C1500, and I知 getting that code too. So for now I知 kind ruling out that it may be any of the timing chain components, considering that it was professionally rebuilt. I need a new distributor anyway so I知 gonna put a new one in along with a new crankshaft sensor and see if that code clears after that.
Following any progress you make with your 96.
1345 code went away, briefly. Now I get 0 3 0 7, engine misfire on cylinder 7. Don't know if it's a bad injector or pop it. The spark plug looks as if it's brand new, has not got any carbon or black on it from gasoline being in the fuel-Air mix and firing. Forgot to check the compression, while I had that spark plug out. Maybe I tightened one lifter down too far, and one valve is not closing. Just hate the thought of all the labor, to disassemble the intake again.
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Old February 12th, 2019, 5:05 PM
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Originally Posted by Chuck1975 View Post
1345 code went away, briefly. Now I get 0 3 0 7, engine misfire on cylinder 7. Don't know if it's a bad injector or pop it. The spark plug looks as if it's brand new, has not got any carbon or black on it from gasoline being in the fuel-Air mix and firing. Forgot to check the compression, while I had that spark plug out. Maybe I tightened one lifter down too far, and one valve is not closing. Just hate the thought of all the labor, to disassemble the intake again.
Those spider units are bad about getting stopped up with carbon deposits. There is a MPFI unit you can buy that is a direct swap from the stock unit, it痴 electronically controlled instead of mechanically. But if your not trying to spend any money, you may can just clean the stock unit yourself. I致e never looked into how to properly clean them but I bet that would help
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Old May 27th, 2019, 9:10 PM
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Originally Posted by billycooper82 View Post
Man im having a similar problem on a 97 Chevrolet C3500 flatbed. My Truck was running fine, check engine light came on but truck still running fine no issues in performance. Two days later, truck ran fine first half of the day, killed it, went inside for bout 20 minutes came back out to leave & truck was hard to start, would rough idle for a few seconds & die. Ran OBD2 Scanner got P1345. Replaced camshaft sensor & crankshaft sensor, still no start, replaced fuel pump then realized it was the fuel pump relay...fixed the relay & truck started right up. Ran fine til half way thru the next day then suddenly just died while going down the fwy. So took cap off the distributor & saw it had spun the rotor off, so I put a new rotor on & it started up drove about 10 miles it Backfired (popped) real loud & died AGAIN. So, I bought another new rotor cap, & new plugs & wires, hell even went ahead & bought a new battery...changed those out, was able to finally get it to start up but was a rough start & wouldnt idle on its own, had to keep my foot on the gas petal to keep it from dying. Had it towed to where it sits now & hasnt started back up since I towed it from the fwy. Now, when Im trying to start it it's steadily popping & won't start at all. Anybody have any suggestions on what my next step should be?
Having similar problem. Timing was +30. Pulled distributor up enough to dial back the rotor clockwise one tooth. Timing is still +26. Can believe that only changed 4 degrees. Thinking there must be more to it. I welcome any ideas. Thanks
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