hfthe3rd

iTrader: (1)

I currently installed my bbk manifold..everything went pretty smoothly untill I fired the car up and its reving to the moon. Im asuming its a air leak because from prior experience working on jet skis thats usually the case. The manifold looks like its sitting pretty flush, i tighten all the bolts down.

how can i check that its the manifold or its something else going on ? I believe every hose is tight and put back on.

99SSJarhead

iTrader: (2)

Did yo make sure to get that tiny hose that connects in the rear opposite the brake booster?

hfthe3rd

iTrader: (1)

Yup, the one under the connector in the back.

99Bluz28

iTrader: (35)

Did you put the lower profile valley cover bolt in the rear, do you have the LS1, or LS6 coolant pipes under the intake?

hfthe3rd

iTrader: (1)

I have a ls1 , what lower bolt? I had to buy bolts bc I bought it used with out hardware.

99Bluz28

iTrader: (35)

You'll need a button head bolt for the Passenger side rear on the valley cover.
Did you remove the green clips off the knock sencor wires, and the rubber taped to the wires, and you'll need to slightly flatten down the coolant tubes to get them closer to the valley cover.

Here's the bolt size: M8 x 1.25 x 32

Pwebbz28

iTrader: (31)

Another thing is the manifold will sometimes hit the small head bolts if the heads have been milled. If thats the case just grind on the intake a little where they are hitting.

hfthe3rd

iTrader: (1)

its still stock heads. second time around hit all the coolant lines down , sat pretty flush and went to install it and got the same thing...reving to 4 k....fawkkkk

hfthe3rd

iTrader: (1)

I put the stock manifold back on and guess what reving still...what could i possibly be doing wrong. the only thing i can think of is the OPSU is broken but would that cause crazy amount of rpms

88gtman

You need to get the button head bolt that replaces the stock valley cover bolt. If you really want to find the leak then try spraying some brake cleaner around the manifold while it is running. If the revs drop then that is where the leak is . Also make sure you torqued the bolts properly. Also check all your vaccum lines, make sure all of them have been reconnected.

hfthe3rd

iTrader: (1)

gezz i deff messed something up..it wont even work with the stock ls1 manifold..

99SSJarhead

iTrader: (2)

have you checked to make sure the throttle body is completely closed when the problem occurs. I'm not sure on yours but on my SS the throttle cable looks to have two mounting locations but if placed on the wrong part it'll put enough pull on the throttle to open it a bit.

hfthe3rd

iTrader: (1)

Ya currently I went back to the stock manifold and its still Reving like crazy. Tb blade is closed

99Bluz28

iTrader: (35)

Did you double check the factory pcv system rips, tears, or breaks?

hfthe3rd

iTrader: (1)

It ended up being the throttle body was not sealing or was opening when I turned the car on

99Bluz28

iTrader: (35)

Good to hear you solved the problem.