97 Chevy C1500 w/codes PO339 and PO341

[driver540]

Have a 97 Chevy C1500 with 4.3 manual tranny. Had put new timing chain in and afterwards have codes PO339 and PO341. Have changed every sensor on this darn thing and tuned up twice. Will run for about 15 min. then start runnin rough and die. Will give PO341 everytime even after cleared and sometimes PO339 is given too. Any thoughts

[jgate]

PO341 This DTC identifies that the cam and the crank relationship is skewed and that the cam pulses are read in a haphazard ratio to the crank pulses. This fault is not a solid or consistent failure. The fault may not act the same way twice. This DTC is a type B DTC.
A poor connection, rubbed through wire insulation, or a wire that is broken inside the insulation may cause an intermittent.
Any circuitry, that is suspected as causing the intermittent complaint, check for the following conditions:
Backed out terminals
Improper mating
Broken locks
Improperly formed or damaged terminals
Poor terminal to wiring connections or
Physical damage to the wiring harness.
Inspect the face of the CKP sensor for metal shavings. This could result in an intermittent DTC P0339
Check for an intermittent short to the voltage or EMI (electromagnetic interference) such as the wires which run along side the spark plug wires or any high power transmitters, on the Crank or Camshaft Position sensor wires. Monitoring the engine RPM with a scan tool can detect an EMI. A sudden increase in the RPM with little change in the actual engine RPM, indicates EMI is present. If the problem exists, check the routing of the secondary wires and the ground circuit.

[crank.it]

hi driver- i just had a similar situation with a 97 yukon...see post ..2old gave some info on colation or phasing the cam gear and dist gear.....might help you out...I haven tried it yet on the yukon cust is saving money incase a dist is needed...crank.it