I have a gen iv 6.0 stroked to a 408 and put it in my avalanche the ecm has the DoD deleted and that's it. Waiting for tuner. But since I put it in the crank sensor isn't reading the trigger anymore. I used the stock 5.3 flywheel etc. What's going on here? Will the programming take care of this or is it an issue with compatibility?

 

What reluctor wheel is on the 408? What color is your crank position sensor? What year model avalanche?

 

It's a 2008 avalanche with a 58× reluctor wheel. Im 90 % sure the crank sensor is black. But ill double check and make sure.

 

58x needs gray crank sensor

 

Ok I'll double check it's the original sensor off the avalanche so is the reluctor wheel so I guess it has to be the grey one. So assuming it is grey what else could be causing this issue? It had afm which was obviously deleted when I swapped the motor but the computer guy only deleted the afm in the ecm nothing else bc he was supposed to finish the tune and programming after I installed the engine and dropped it off. Unfortunately he had some family problems and now they're backed up for a few months also they specialize in diesel engines.

 

What is the pn from the timing set or cam gear you used? need the actual part number.

 

I'll let you know in about an hour when I get home. Pilchers racing built the engine and bought the timing set but I should have some info on it.

 

I'll call pilchers tomorrow to find out what the pn is on the timing set. I know that they put a gen II cam in it.

 

P0315 crankshaft variation not learned is the code that I've had since installing the stroker.

 

There is a crank learn procedure but it takes a scan tool or hpt to do it.

 

A Gen II cam will not fit in an LS-type engine.

 

Ok I'll see what I can find. Thank you


gen II ls aka ls I

 

LS1 is GenIII

 

the pn for the timing set is an erson 78934T-9.

 

That is the wrong one. it is a 1x cam gear. you need 4x.

http://www.pbm-erson.com/Catalog/Erson/Timing%20Sets/PBM9978T

It LOOKS like its a cast cam gear and crank gear that is just machined, if that is the case then youd just need a 4x 3 bolt cam gear
This one
http://www.ws6project.com/user_stor/catalog/product_info.php?cPath=235_426_211&products_id=302 4

 

while I was reading this getting upset the speed shop called me back and gave me another on and said this is the on to the timing set so looks like I'm gonna have to pull the cam sensor and see if I can get a camera in there to see if it's a 4x sprocket or not. I'll let you know this weekend what I found out. Thanks again

 

Taking the water pump off and taking cam sensor out would give you straight line of sight to it and you could tell. may need a flashlight. otherwise the camera on your phone in video mode should catch it as you turn engine over.

Honestly when even use such an unknown set anyway unless it was either left over or cheap? Hope tha helps you out. Good luck!

 

78936T-9 is the second on they gave me. This was a brand new gen iv 6.0 steel block and everything in it was new. I provided the block and heads and they built the long block for me that s why i didn't know the on for the timing set. The speed shop runs top fuel class and have a ton of customers and came with high respect in the race world. I specifically asked for all gen iv internals and they talked me into using a single bolt lt1 cam that one of their guys at crane said would be the best cam for the build. I spent 1040.00 for the cam and lifters that s supposed to be the only part that s not a gen iv. So if it's not a mechanical problem what could cause it? Could it be a broken cam sensor or crank sensor ? But that would give me a different code right? Could it be the ecm? He deleted the afm and was supposed to do everything else to program it but obviously there isn't enough money in it to mess with...

 

You cannot use an lt cam in an ls. either the gen2 sbc lt1 or gen5 lt1. That timing set is not made for a single bolt cam either. There is so much that does not make sense. If i were you id check both the cam sprocket and the crank sprocket. you can see both visually. after youve confirmed that then on to the next part.
Not trying to knock your shop but getting mixed signals from them and odd ideas they seem like they dont have a firm grasp on the ls stuff. Crane has ok cams, but for 1k for just cam and lifters that seems wayyyy padded for profit. our ls7 lifters are 95 and cams are 385. springs even are like 130 - 289. so thats still not 1k.

 

Heres the cam gear with the sensor removed. The sensor broke off in the cover and it took me 2 days to extract the end of it. That looks like the pick up in rhe photo right?