97AGGIE

iTrader: (1)

Need to see if anyone has run across this before....long story short, just built a new short block from my truck...6.0 iron...ls1 style...maggie...Ok...went with the GM ZR1 cam (mainly bc it was $90 new). Converted to the LS2 style sensor, cover, and extension wire, along with the 3-bolt cam sprocket for the cam. I fired the truck up, and no problem...fired right up, runs and drives good. Just driving it for now to put a few break in miles on it, but my problem is that every other crank the engine light comes on with code P0340 which is the cam sensor...everything I see and read basically says that if your getting this code you should have other probs or that it wont crank. I dont have that at all. Cranks fine...runs and drives fine...just that it comes on randomly. I can clear the code and it will stay off for as long as I drive it. It does not reset or come back on until I turn the truck off and go to restart...and even then sometimes it doesn't reset. Any thoughts or suggestions would certainly be appreciated. Truck was tuned prior to this small cam change....(already tuned for a maggie and a 2002 ZO6 cam).

Thanks,

JP

MontecarloDrag

iTrader: (3)

Is the cam reluctor 4x or 1x?

97AGGIE

iTrader: (1)

4X...part number was 12586481, but I am told that number changed and is now 12623754.

MontecarloDrag

iTrader: (3)

What year is your car/PCM?

97AGGIE

iTrader: (1)

2002 6.0 truck.

MontecarloDrag

iTrader: (3)

That is your problem. That PMC is Gen 3 and needs a 1X camshaft reluctor. The good news is you can easily change it.

You can see the difference between them. Left side is a 1X reluctor, right side is 4X:

97AGGIE

iTrader: (1)

Thanks. Makes sense..guess I just bought the wrong one....being that it runs and drives like normal (aside from the random light from time to time), and idea if driving it this way for a while has any real effects until I make the swap?

MontecarloDrag

iTrader: (3)

Some cars don't even care about cam signal, they are only a bit harder to start. I have seen cars that run like crap until you fix the issue.

If yours works good there is no problem driving it until you have the correct gear, it won't damage anything

97AGGIE

iTrader: (1)

No worries...swapped it out last night...found it for about $25 at local dealer...just need to put water pump and fluids back in it today after work. Thanks...not sure how I ended up with wrong gear installed...but was certainly the 4X as in your pic.