Last Tuesday afternoon I finally got around to removing my supercharger so that I could sell it. My next step was to install my cam that I purchased about a month or so ago and just has been laying around the shop. The cam is a 212/218 .529/.532 on a 114lsa. Anyways I went ahead and installed a new doulble roller, LS6 oil pump, and 918 springs. I finally finished Thursday afternoon, I know - it sucks just being able to work a couple of hrs, I took the spark plugs off to prime the oil pump and build pressure while just cranking. I hooked everything back up and cranked it over, it fired right up and ran fine. I noticed my check engine light was on so I killed the truck and check the code, it was a p0107- manifold absolute pressure low input. I cleared it and it never came back on. Oil psi was good and my water temp was up to operating range, so I get the truck out of the shop and take it for a spin. Drove normal for the first few minutes and then decide to get on it, it just falls on it face, no power !!!!!!
I get back to the shop and park it out side so that I could clean up the shop. I get back in the truck to move it inside, light comes on again, same one. I cleared it and light stays on even with out starting up the truck, it will throw that code. So last night I tore it back apart to double check my timing chain marks and they are good.
What could my problem be??????????

 

I did get a retune for the cam.
Sorry guys for the long post.

Thanks Jesse Q

 

did the new tune allow for the missing blower?

 

it is because of the loss of vacume. I would bet your vacume is around 60-70 kpa. The same thing happened to me, you will need to make a slight ve change @ idle, also change map hysteria values. It is not a big deal, it will load up & bog down. I thought you were going to get flyer to tune it for you....?

Email me your file with your log & I will change it for you. I spent eons of time with that cam learning to tune.