**HELP** problems after ls6 intake install
Thread Starter
Staging Lane
Joined: Apr 2005
Posts: 78
Likes: 0
From: Wilkes-Barre,PA
**HELP** problems after ls6 intake install the car does start, but it idles at 4000 rpm and it sounds like its hitting off a rev limiter or something. ANY IDEAS OR THOUGHTS WOULD BE HIGHLY APPRECIATED.
its either a huge vacuum leak or you have a mouse that got stuck in your throttle body while it was off.Make sure you have no vacuum leaks and try to remember if you had the gaskets on the bottom of the manifold on correctly.you would have to pull it to check.
Thread Starter
Staging Lane
Joined: Apr 2005
Posts: 78
Likes: 0
From: Wilkes-Barre,PA
yes i did remove ks clips. i also did use the 2 plugs and the new front coolant pipe. what do you mean by the gaskets on the bottom of the manifold. are they the gaskets that are around the ports on the intake. im so pissed i even did the swap. i should of took it to someone who knows what there doing. 
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Originally Posted by 1BAD_Z28
iff the throttle linkage is in a bind wouldnt the butterfly on the throttle body be open a little. but it isnt though.
Did you use NEW gaskets for the intake ports and torque to spec? Also, you should be able to reach around back for the 3 things that join with the intake without removing it. Did you re-hook the hose from the intake back into the firewall?
Did you use NEW gaskets for the intake ports and torque to spec? Also, you should be able to reach around back for the 3 things that join with the intake without removing it. Did you re-hook the hose from the intake back into the firewall? Let us know what you find.
Thread Starter
Staging Lane
Joined: Apr 2005
Posts: 78
Likes: 0
From: Wilkes-Barre,PA
i bought the intake new from gmparts direct, i dont have a torque wrench but ls1howto said you can do it without one. i did check and the 2 small lines are connected but i cant really see the big hose. that was the one that my friend put on, or said he put on. i will look at that one tommorow when i can see better.
THANKS ALOT GUYS I'LL KEEP YOU POSTED
THANKS ALOT GUYS I'LL KEEP YOU POSTED
the big vaccuum line comes from the drivers side then you have a small line coming from the passenger side and 3 sensors to hook up 1 is for your knock sensors i hooked all mine up before i slid the intake all the way back gave me a little more room
First, check to make sure that your throttle body is tightly bolted to your manifold. If you have an air leak after the MAF sensor, you will have a wildly high idle. I did that when doing a "home-made" EGR blockoff plate on my old LS1 manifold and I idled around 3000 or so, and it would fluctuate.
Second, give the manifold a good old reacharound. You will be able to feel all the stuff back there. You should have a big hose (connected to the brake booster) coming from the driver side and connecting to the rear of the manifold. Then, you will have some small vacuum hoses that hook into the passenger side of the intake. Actually, there are 2, that form a "y", then hook into the manifold as one.
And, finally, there is the 1 sensor that plugs into it on the passenger side. (all this stuff is in the back)
Oh, also, make sure you didn't crack your oil pressure sensor. It is a small, upright plastic thing, about the size of a canister of 35mm film. It is just on the driver's side of all the plugs in the back, screwed to the manifold. I broke mine off - but if you just cracked it then you may not have realized it (just wiggle it, it shouldn't move).
I just did mine 3 days ago, and I screwed up a few things (oil pressure sensor, didn't take off all the EGR crap I could have, etc.), but finally got it fixed. Once it's all done, it's worth it!!
Also, redneckZ, I'm not sure what you mean by "new gaskets" - the LS1 and LS6 intakes have integral gaskets that cannot be replaced.
Second, give the manifold a good old reacharound. You will be able to feel all the stuff back there. You should have a big hose (connected to the brake booster) coming from the driver side and connecting to the rear of the manifold. Then, you will have some small vacuum hoses that hook into the passenger side of the intake. Actually, there are 2, that form a "y", then hook into the manifold as one.
And, finally, there is the 1 sensor that plugs into it on the passenger side. (all this stuff is in the back)
Oh, also, make sure you didn't crack your oil pressure sensor. It is a small, upright plastic thing, about the size of a canister of 35mm film. It is just on the driver's side of all the plugs in the back, screwed to the manifold. I broke mine off - but if you just cracked it then you may not have realized it (just wiggle it, it shouldn't move).
I just did mine 3 days ago, and I screwed up a few things (oil pressure sensor, didn't take off all the EGR crap I could have, etc.), but finally got it fixed. Once it's all done, it's worth it!!
Also, redneckZ, I'm not sure what you mean by "new gaskets" - the LS1 and LS6 intakes have integral gaskets that cannot be replaced.
Thread Starter
Staging Lane
Joined: Apr 2005
Posts: 78
Likes: 0
From: Wilkes-Barre,PA
ok i have all 3 hoses hooked up in the back of the manifold(2 small 1 big). i didnt break the oil pressure sensor. the throttle body is on tight no leaks there. i guess theres only one thing left to do take it iff again 
Thread Starter
Staging Lane
Joined: Apr 2005
Posts: 78
Likes: 0
From: Wilkes-Barre,PA
can anyone remember what the color of the 2 small hoses that goin into the back of the manifold. because i found 2 L SHAPED black ones when i was starting to pull it off again. maybe i plugged the wrong ones back there????
Originally Posted by 1BAD_Z28
can anyone remember what the color of the 2 small hoses that goin into the back of the manifold. because i found 2 L SHAPED black ones when i was starting to pull it off again. maybe i plugged the wrong ones back there????
All the hoses are black. The one from the passenger side should go into the wiring harness (the fat one) that goes into the T fitting (if you still have your air pump) which goes into the hole right below the MAP sensor. I don't know what 3 sensors the other guy was talking about. The Drivers side is the huge brake booster line.
Call me I can explain it to you. I'll PM you.
QUOTE: Also, redneckZ, I'm not sure what you mean by "new gaskets" - the LS1 and LS6 intakes have integral gaskets that cannot be replaced.
My friend and others on here have bought LS6 intakes that have not come with gaskets and/or had gaskets too worn like mine that had to be replaced. You CAN and SHOULD replace these gaskets if necessary. They are like $80 though if I'm not mistaken. A while back some people were even selling new LS6 intakes for cheap that didn't come with gaskets.
My friend and others on here have bought LS6 intakes that have not come with gaskets and/or had gaskets too worn like mine that had to be replaced. You CAN and SHOULD replace these gaskets if necessary. They are like $80 though if I'm not mistaken. A while back some people were even selling new LS6 intakes for cheap that didn't come with gaskets.