Secondaries are always open...

[wood_e]

Does anybody have a vacuum diagram or pictures of how the secondary intake runner circuit functions? I just did my 60k today and everything went well except my secondaries are always open.

 

[CosmoSHO]

Hey Wood_e,
Check out the wiring harness on the back of the intake. It controls the secondaries opening at ~4000rpm.
I forgot to reconnect mine once and had the same problem.
thumb
Cosmo

 

[RStalveyARFF]

there are a couple things to check here. First would be to make sure the electrical connector on the rear of the intake is plugged in. There are 2 vacuum lines connected to that, then there are 2 on the canister mounted next to it. One vacuum line should be connected to the back of the intake, then there should be the hose going to both butterfly actuators.

 

[Dr. Tweak]

check the vacuum lines to that same controller and make sure that none of them were disconnected when you removed/replaced the intake.

 

[wood_e]

Thanks guys for the replies. I'll see how everything looks tomorrow and report back here! thumb

 

[sdpatt]

Here is a description of the hose routing for the intake manifold runner control (IMRC) system.

 

[wood_e]

Well I found my problem I think.

The bottom of the T fitting runs back to the rear bank, and the left side runs back to the front bank. What hose is missing in the pic?

 

[AutoSHO]

Looks like the hose from the Secondary Solenoid on the back of the manifold is disconnected.

 

[wood_e]

Good call chris! I reached down to the back of my intake and found a disconnected line. I connected it back up and they function normally. Thanks for all the fast replies. I am again in debt to the forum