ACCELR8

Last year I installed a cam and LS6 intake and removed the A.I.R. and EGR systems. I drove the car for a couple of months before storing it for the winter. During this time I didn't use the heat or AC, so I didn't notice any problem. However, when I took the car out of storage this year I noticed the air control selector didn't work. For instance, if I put the heat on the air will blow out of the lower vent and the defrost at the same time; no matter where I position the air control selecter (e.g., if I put the air selector on the dash vents the air still blows out of the lower vent and the defrost). I have no clue if this is related to the cam change, but I find it strange that the problem arose after the install. Does anyone have any suggestions for how I can fix this problem?

Thanks,

Jim

2001NBMZ28

Doublecheck all your vacuum lines under the hood.

SeVeReDiStOrTiOn

yup...probably have a vacuum line pinched under the intake manifold or just not connected at all

ACCELR8

Do you know specifically where to look (e.g., in the back of the intake)? Last week I looked around for a disconnected vacuum line, but didn't find anything. However, I really didn't know where to look, so it wouldn't surprise me if I missed it.

Thanks,


Jim

2001NBMZ28

Yeah, look behind the intake.

joshp14

iTrader: (5)

There is a vacuum line that runs from over by the HVAC box by the PCM to the back of the manifold. This vacuum line is for your HVAC controls...make sure its connected.

DBUS6

iTrader: (6)

and up and around the pass.side firewall and then listen for a leak while it's running feeling w/hand near all hoses while someone is switching a/c controls to all positions (slowly)

ACCELR8

All,

Thanks for the advice!

I'll check it this weekend. I'm sure you'll hear from me if I don't find it.

Thanks again,

Jim

ACCELR8

Problem solved.

Thanks for the advice!

Jim

2001NBMZ28

Cool. What was it/how did you find it? Post it for everyone seeing this later after a search.

ACCELR8

A vacuum hose was disconnected from the back of the intake manifold.

When I installed the cam and intake I removed the A.I.R. system. The A.I.R. system pulled vacuum from the back of the intake. So when I installed the new intake I put a cap on both vacuum ports (for lack of a better word). I thought both went to the A.I.R system, but I was wrong. One went to the A.I.R. system and one went to the air control selector. I did not notice a problem during the install, because when I pulled the original intake I tucked the air control vacuum line up under the cowl to get it out of the way. During the install I forgot about it. So to solve the problem I search around for a disconnected vacuum line. When I found it I immediately realized what had happened. After 45 minutes of screwing around I was finally able to remove the cap from the back of the intake and connect the vacuum line, which solved the problem.

I guess I can't complain. This was my first cam install and that was the only problem/ stupid mistake I ran in to.

Jim