Help with code p1345. I just put a used engine into my 1997 Tahoe 5.7.
I have used a scanner to rest the code and it comes back shortly after start up.
I have checked to see if I have the dis. Set at TDC (hope I am not off one tooth)
If I were off a tooth would the truck run?
I looked on this and other forums and found some things to CK
Yes I am getting some play in the rotor (will a new gear fix the code?)
I have tried to move the Dis. And I can get the code to go away but the engine runs like crap. (Yes I know I can not change the timing this way.)
Also is there a way to test the cam sensor?
The scanner I am using dose not show me cam retard. So I tried to tune by ear.
Also the tach dose not seem to read. Some time it will lag behind or read lower then the scanner (this is not a new problem) with moving the Dis. the seems to be working.(but I get the P1345 code.)
The used engine I installed has 152K on it. The Dis. is from the first engine it had 184K on it.

Thank you for the help.

Diagnostic aids from a '98 C/K manual for P1345.

1. A loose CMP (cam position sensor) causing a variance in the sensor signal.

2. Excessive free play in the timing chain and gear assy.

3. Incorrectly installed distributor-1 tooth off in either advanced or retard positions.

4. A loose rotor on the distributor shaft.

5. A loose or missing dist hold down bolt.

There are countless threads on this code and how to correct it.

The scanner I am using dose not show me cam retard. So I tried to tune by ear

You have to use a scanner...DO A SEARCH!

Thanks for the help. I did do a search and talked to a tech at a dealer most likley I am one tooth off. thank for all the info.