Working on an 02 van with 5.7. Runs rough and you have to give it throttle to start it and keep it running. Throws Crankshaft/Camshaft correlation variation codes but has both new sensors. Scanned with EFI Live and timed it between -2/+2 degrees but still getting the code and still rough.
Has new wires and plugs.
Any suggestions are appreciated. I'm thinking I need to pull the Dist and check the gear. Really hoping it didn't jump time n need a new timing chain.

Exhaust smells horrible.

 

I would first try a crank relearn procedure with EFI Live. Did you do any work to it (intake gaskets) or did this code just come up? How many miles on the motor? Unfortunately it does sound like it jumped timing of some sort but try a relearn first.

 

very first thing I tried is CASE relearn. Just says OK everytime I click it. Went ahead and tried the procedure anyway and nothing different.

Maybe what's getting me is i'm applying the Brake instead of the Parking brake.

I haven't done any work on this engine other than get the timing where it should be. Planned on checking intake gasket whenever I remember to bring some carb cleaner out there with me.

 

I know with a Tech II you have to apply the parking brake but if you had this problem before changing the cam/crank sensors (which I'm assuming you did), then, most likely you have a mechanical timing failure. Either with the distributor gear or the timing chain has stretched. My money is on the dist. gear like you mentioned in your first post.

Does this have alot of miles on it? I would pull the distributor and check the gear. Hopefully the camshaft isn't worn out - seen that too unfortunately. Where the distributor gear rides on the cam.

 

What did you do to adjust the timing??? What's the reason it needed an adjustment???

 

On the older Vortec the timing at the distributor is supposed to be between -2 and +2 so that the cam sensor sends the proper signal to the PCM and is correlated to the Crank sensor. At least that's how I understand it.
Everything I've read on em says you'll throw P1345 if the dist isn't in the right position.
Using EFI Live you have to monitor it using the Camshaft Position Retard Pid then loosen the dist and turn it to get between -2 +2.


I'm not sure on the mileage. The guy just wanted me to come look at it because the dealership tried to tell him the motor needs replaced. Don't want to come to that conclusion without checking the simple stuff first.

Hopefully I'll be able to go back n look at it tomorrow. I know the person before me changed the rotor bud, cam sensor and crank sensor. Haven't pulled the dist out all the way to check the gear.
Just don't want it to be the timing chain cuz I have other things to work on too. lol

 

This is what I was most concerned with. If you can inspect the rotor and cap first. Then make sure he put the wires on correctly.

I Had one with a cap that wasn't seated properly. Although Rare, some times the Cheap cap and rotor sets aren't manufactured right and the gap between the 2 will cause issues.

Make sure the crank sensor is also seated properly. Seen that as well.

 

The 5.7 vortecs are well known for eating dizzy gears. Check the gear, chances are its ate up.

 

Thanks for the input fella's. As soon as I can get back to working on it I'll check the Dist gear. Hope it's that and not the chain but I'm starting to lean toward chain.