2002 5.7 timing issue

[typhoon917]

Hi, I hate to come out of the box on my first post and ask for help but I've hit a road block and need to ask I have a 2002 2500 with a 5.7 gas that I don't seem to be able to get right. In starting, I full rebuilt the engine and the only original parts are the block and head casting, and the crank which was cut .010. I'm figuring someone will drive this to my funeral, hopefully in 50 years or so, but I've got an issue to straighten out. It starts with a light tap and runs at a cold idle about 750 RPMs and warns up to 625 Rpms with a solid idle. It drives smoothly but after I shut it down (after 100 miles or 10)I get a[the dreaded P0345 but both the crank sensor and distributor are new. It's running at +17* at idle, no nickups or burps and when I try to reset the distributor back a notch, it still shows +17*-and further back and it won't stall. Is this a function of the "computer relearn" that I need to have a dealer do? Am I missing the timing mark ? Am I crazy??? I know the distributor needs to be set a 0* +/- but I can't find it. The tining chain and gears are new, I set the distributor mechanically on the stand and it started on the first tap once it was in the truck. I've rebuilt dozens of engines and I've learned-I HATE COMPUTERS!!!! HELP.

[truckdude239]

CRANKSHAFT VARIATION RELEARN (CASE Learn)

”CASE” means: crankshaft angle sensor error. A crankshaft variation relearn must be performed if:

A diagnostic trouble code of P1336 is present.
The computer has been replaced or re-programmed.
The crankshaft position sensor has been replaced.
The engine, harmonic balancer, clutch, or flywheel have been: disassembled, removed, or replaced.
The crankshaft position variation learning feature enables the computer to compensate for part manufacturing tolerances. This allows the computer to accurately detect an engine misfire throughout the engine RPM range. The learning process is stored in the computer’s memory and does not have to be repeated unless one or more of the above conditions are present.


To perform the relearn, proceed as follows:

Connect a scan tool to make sure there are no trouble codes stored in the computer’s memory. If there is any power train trouble code other than P1336 (Crankshaft Position Variation not learned), the computer will disable the relearn function until the problem that aused the code has been eliminated. Also, make sure that the engine coolant (check it when the engine is cold) and oil levels are at an acceptable level.

1. Set the parking brake and block the drive wheels. Make sure that the hood is closed.
2. Start the engine and make sure that the engine coolant temperature is at least 158 degrees F. (70 degrees C.)
3. Turn the engine off for at least 10 seconds.
4. Select the crankshaft position variation learn procedure (CASE Learn)on your scan tool.
5. Make sure that the transmission is in Park. Start the engine.
6. Apply the brakes and hold the pedal firmly.
7. Follow the scan tool instructions.

Remember: That you are going to increase the engine speed to approximately 3000 RPM, 4000 RPM, or 5150 RPM. That’s the variation learn fuel cutoff RPM (depending upon the engine), and that it’s important to release the throttle when the engine RPM starts to decrease as a result of the fuel cutoff going into effect. Failure to do such will result in over revving of the engine, causing possible engine damage.

8. Once the engine has returned to idle, check the status of Diagnostic trouble code P1336. If the scan tool indicates that the CASE has been learned, the relearn procedure is now complete. If CASE has not been learned, check for the presence of other power train codes. If any exist, correct the problem, then repeat this procedure.

NOTE: If the Crankshaft Variation Relearn is not accessible through your scan tool (some truck applications 1998 & later), perform the relearn in the following manner:

1. Turn off all of the accessories. With the Air temperature sensor and Coolant temperature within 5 degrees (Centigrade) of each other, start the engine and let it idle in Park or Neutral for two minutes.
2. Accelerate the vehicle to 55 mph at part throttle. Cruise at 55 mph for 8- 10 minutes until the engine reaches operating temperature.
3. Cruise at 55 mph for another 5-6 minutes.
4. Decelerate to 45 mph without using the brakes, and maintain 45 mph for 1 minute.
5. Perform 4 deceleration cycles, without using the brakes, of 25 seconds each where no specific speed is necessary. Returning to 45 mph for 15 seconds in between deceleration cycles.
6. Accelerate to 55 mph and cruise for 2 minutes.
7. Stop the vehicle and idle for 2 minutes with the brake applied and the transmission in Drive (automatic trans.) or Neutral (manual trans.) with the clutch depressed. Refer to diagram A on page 8.

[truckdude239]

1. Turn off all of the accessories. With the Air temperature sensor and Coolant temperature within 5 degrees (Centigrade) of each other, start the engine and let it idle in Park or Neutral for two minutes.
2. Accelerate the vehicle to 55 mph at part throttle. Cruise at 55 mph for 8- 10 minutes until the engine reaches operating temperature.
3. Cruise at 55 mph for another 5-6 minutes.
4. Decelerate to 45 mph without using the brakes, and maintain 45 mph for 1 minute.
5. Perform 4 deceleration cycles, without using the brakes, of 25 seconds each where no specific speed is necessary. Returning to 45 mph for 15 seconds in between deceleration cycles.
6. Accelerate to 55 mph and cruise for 2 minutes.
7. Stop the vehicle and idle for 2 minutes with the brake applied and the transmission in Drive (automatic trans.) or Neutral (manual trans.) with the clutch depressed. Refer to diagram A on page 8.
__________________

[truckdude239]

also you could have a bad cam sensor in the new distabotr

[gmclowsierra]

Hace you set the timing with the scan tool. What code are you getting?
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[bighaas79]

With the scan tool hooked up showing the cam retard reading, start the vehicle up. Don't set the distributor back a notch just rotate the housing in the proper direction to get closer to your desired timing just like you would with a regular distributor. when you think you are close tighten hold down and crack the throttle above 1000 rpm to get the ecm to update the cam retard reading. If you aren't to your 0* +/-2* adjust distributor housing like you did previously, and recheck. You have to crack the throttle above 1000 rpm each time an adjustment is made to get the ecm to update the reading. When correct reading is achieved clear the codes and perform a crank relearn as was described earlier.