So I just swapped a used bottom end in to my 2006 LSJ. Started it up and it's running rough. Idle is bouncing from ~800rpm to ~2000rpm. Some backfiring as well. It's throwing a p0017 code which is cam/crank correlation. When I timed it I made sure it was lined up, and cranked it over by hand until the marks lined back up again, I'm almost positive it's still in time. I had the cam sensor off, is there a chance that I put the cam sensor in wrong? How do I know the sensor is lined up properly?

 

get cylinder 4 in TDC and then put the cam positioning sensor out and look on the outside edge of it there is a little line/bump on it. you have to line up the two lines up to reset it

 

Alright thanks. Would the p0017 code cause the car to run like crap?

 

yes, cam correlation will make it miss, it may be off one tooth on either side or the sensor may be bad but im guessing timing

 

Well got it straightened out. Took it for a drive and now it's throwing a ton of codes and going into reduced engine power.

System too lean
Tb-maf correlation
p1182

and another one that i can't remember.. WTF IS GOING ON!?

 

I'm off warranty and not paying through the ass until I absolutely have no choice.

 

you sure everything is hooked up correctly? all the injectors spraying? plugs firing?

 

i have a p0017 code. I think I'm just going to take it to the dealership

 

Yep, can feel the injectors clicking and it's got four brand new plugs in it.

 

Bump for answers

 

Dont fight the obvious answer, if it says your timing is off, find out. I know thats probably not the answer you wanted to hear, but its rare for a pcm to be wrong about that.

 

I already dug into that. It was actually my CPS out of time. It's no longer throwing the cam/crank correlation code.

 

Sounds like you have a vacuum leak somewhere. That would explain the maf and system lean code.

 

I was kinda wondering that too. I towed it up to Pat's tonight. He's gonna smoke it for me.

 

something that might be corrected by a good tune? if everything is mechanically sound, no damaged wiring or anything then it may just be a matter of dialing it in.

 

Ok cool....let me know what you find out.

 

It's running 42's and a 3.0" pulley on a GM Stage II tune, I don't think it's that.

 

Nah, a tune won't correct this. There's an issue somewheres. In never did this when I owned it and it never did this before the motor went. There are just some things that's tunes won't fix and this is one of them lol.

Nick, never thought but could have a damaged wire going to the maf.

 

It's possible, but I was extremely careful when I installed my intake to make sure the MAF wires weren't pinched. I'll double check tomorrow.

 

So we drove it in the garage to do a smoke test and it threw another p0017 So I pulled the valve cover and timing case off and rolled the engine over for what seemed like an eternity and was surprised to find the engine still in time, WTF? I just drove home and pulled the crank sensor out of my old block and I'm just about to go change crank sensors.

So cam sensor is in time, engine is in time, it's about to have a known working crank sensor installed... If it throws the code again what do I do? Case relearn?

 

Hmmmm.....could try the crank relearn but you shouldn't need to. How does it drive? Lagging power? Any misses when u go to step into it?

 

Cranks forever before it starts and I've gotta give it throttle to get it running. Every once in awhile it'll back fire when I try to start it the first time. Hitches and bucks going down the road, goes in to limp mode every time it sees any boost.

 

Hope you get this figured out man car troubles suck.

 

Fixed a vacuum leak and swapped crank sensors. Everything seems to be good now

 

Nice, glad it worked out. That **** would eat me alive trying to figure it out.