I have changed the crankshaft sensor and the cam sensor still have that code any ideas thanks 1999 blazer 6clc.

 

What DTC's are you retrieving? What symptoms are you having?

Whenever the crankshaft position sensor and/or timing cover is moved, removed, replaced, or disturbed in any way, the crankshaft position sensor relearn MUST be performed with a scan tool capable of initiating the relearn.

 

ok the engine light is on and the code is 1345 crank /cam pos. Correction i replace the cranksensor and cam sensor so what kind of scan tool do i need to relearn can i rent one or do i have to bring it to a shop to have done or i only have 103000 on it runs fine no problem so could it be slake in timing chain

 

Firstly, I'd inspect the distributor for wear, in the bushing and in the distributor gear. I'd also check to make sure your timing marks are right on Cylinder #1 TDC compression.

That codes indicates that the sensors are out of sync. This means the timing could be off (more than likely), and/or as Hook mentioned you will need a relearn process.

 

I agree, P1345 means the distributor is off at least one tooth. After you get the distributor installed correctly, you'll need a scan tool capable of viewing camshaft retard data stream to check and adjust it. The same scan tool that can view camshaft retard, most likely can also do the crankshaft position sensor relearn. This will require a "high end" scan tool, the ones that the auto parts stores have are not capable of either, so you'll probably have to take it to a shop with a technician that is familiar with both procedures.