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Header install problem!

This is a discussion on Header install problem! within the External Engine forums, part of the LSx Technical Help Section category; I just installed a set of BBK longtubes with ORY pipe and no EGR hook up and while my car ...

  1. #1
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    2002 Trans am

    Header install problem!

    I just installed a set of BBK longtubes with ORY pipe and no EGR hook up and while my car idles and as im driving its making a popping noise out of the exhaust and it dosent feel like it has any power.....can anyone help me out its not a Random cylinder misfire im not running any codes. Maybe i forgot to do something idk someone help me out

  2. #2
    The Bandit Wesman's Avatar
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    Go double check your work.

    Make sure all the plug wires are on properly. Remember, they are supposed to click once when you put the wire on the plug, and click twice when you put the wire on the coil.

    Also make sure that the EGR is unplugged so that it is disabled, but it still must be hooked up to the intake manifold to avoid a huge vacuum leak.
    1998 Trans Am WS6 SGM
    Lid, Pro 5.0, WS6 Short Stick, LS7 Clutch, TB Bypass, Detroit TrueTrac, Poly Mounts, Bilstein Shocks, LS6 Intake, SFCs, CTS-V Brake Upgrade, STB, Nitto 555's. SS Longtube Headers and True Duals w/ H pipe and Magnaflows. Tuned by Harris Speed Works. 341.4WHP/346.1 lb/ft.

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    Do you mean unplugged from where it would be unplugged from the header or the plastic piece halfway down the tubing?

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    The Bandit Wesman's Avatar
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    Quote Originally Posted by Josh81990 View Post
    Do you mean unplugged from where it would be unplugged from the header or the plastic piece halfway down the tubing?
    Here is what it should be:

    The metal fitting unplugged from the headers (since there is no ports on the new headers you got).

    The electrical plug harness unplugged from the EGR valve itself.

    The tube from the EGR valve to the manifold should be plugged IN so that there are no leaks between the valve and manifold.

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    yea theres two of them one on each side an those are the only ones plugged in but should i have it plugged or leave it as an open hole cause the end of the tube is a giant hole

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    The Bandit Wesman's Avatar
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    Quote Originally Posted by Josh81990 View Post
    yea theres two of them one on each side an those are the only ones plugged in but should i have it plugged or leave it as an open hole cause the end of the tube is a giant hole
    You can leave the ends of the tubes open, as long as the EGR valve harness is unplugged it will remain shut and it will not affect anything.

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    Veteran 0rion's Avatar
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    so is your EGR still plumbed into the intake? If so just take it off there ( 2 bolts) and remove the entire system from the car. Get a 1 3/8" expandable freeze plug from the parts store and plug the hole in the intake with that.
    Also, what kind of extensions did you use on the front O2's? Home made or store bought?

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    Junior Member blworden's Avatar
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    JOSH81990 I was wondering what you did with the A.I.R. sensor that was attached to your passenger exhaust manifold? I purchased some Texas Speed 1 7/8 long tube headers with the O2 sensors ports but not the EGR or A.I.R. ports.

    I asked the Texas Speed rep this question:
    I have a couple questions pertaining to your Texas Speed 1 7/8" Long Tube Headers for my 2000 Camaro SS.....

    1. If I want to take the EGR, A.I.R. sensor connectors from OEM exhaust manifold and have them put on the headers is that feasible?

    2. If I just put the headers on, how do I get around not hooking up the EGR and A.I.R. sensors?

    His reply:
    You will have to fab something up to make the EGR work with our headers. If you want to remove it, you can simply take it off the car and you will be fine. You will need to have the codes turned off in the ECU by a tuning software so you won't have an SES light. It won't hurt anything in the meantime if the light is on before you get it tuned out.

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    Veteran 0rion's Avatar
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    you can remove the entire a.i.r. system from the car the same as with the egr system. Just pull it out of there. Seems like on the later models you have to plug a vacuum port for the air system...didn't have to on my 98. The air pump itself is behind the drivers side headlight....there should be an access panel to it under the bumper.

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    Junior Member blworden's Avatar
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    Orion, did you have to disable ECU codes or when you removed A.I.R. system did it disable itself?

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    Veteran 0rion's Avatar
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    Quote Originally Posted by blworden View Post
    Orion, did you have to disable ECU codes or when you removed A.I.R. system did it disable itself?
    you have to disable them in the pcm. Won't cause any trouble not disabling them but you'll have a ses light on. With the EGR there's a timing adder table that needs zero'd out.

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    Junior Member Devildog1371's Avatar
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    Im having the exsact same problem!!

    Quote Originally Posted by Josh81990 View Post
    I just installed a set of BBK longtubes with ORY pipe and no EGR hook up and while my car idles and as im driving its making a popping noise out of the exhaust and it dosent feel like it has any power.....can anyone help me out its not a Random cylinder misfire im not running any codes. Maybe i forgot to do something idk someone help me out
    Please tell me how you fixed it! This is pissing me off!

  13. #13
    Member 02fbody35th's Avatar
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    Quote Originally Posted by 0rion View Post
    so is your EGR still plumbed into the intake? If so just take it off there ( 2 bolts) and remove the entire system from the car. Get a 1 3/8" expandable freeze plug from the parts store and plug the hole in the intake with that.
    Also, what kind of extensions did you use on the front O2's? Home made or store bought?
    if josh81990's avatar is correct. it says he has a 02 trans am, their is no egr system on his car. so i dont think it would be that causing the misfire. but i see where orion was going. I would make sure you tightened all the plugs properly and properly installed all the wires. Also check your gaskets make sure their all in place and bolts are torqued. you might have a leak.

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    Veteran 0rion's Avatar
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    Quote Originally Posted by 02fbody35th View Post
    if josh81990's avatar is correct. it says he has a 02 trans am, their is no egr system on his car. so i dont think it would be that causing the misfire. but i see where orion was going. I would make sure you tightened all the plugs properly and properly installed all the wires. Also check your gaskets make sure their all in place and bolts are torqued. you might have a leak.
    nice catch.....I didn't even notice that. Wonder if he's talking about the a.i.r. system then? There's a vacuum port back there that has to be plugged on the 02's I believe.

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    Member 02fbody35th's Avatar
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    Quote Originally Posted by 0rion View Post
    nice catch.....I didn't even notice that. Wonder if he's talking about the a.i.r. system then? There's a vacuum port back there that has to be plugged on the 02's I believe.
    yeah you are correct. if his headers dont have the bung for the air system he would need to disconnect the pump, but i dont think that would cause drivabilty issues, just a ses light and some noise like an air leak. the only purpose of the air system is to heat up the cat upon ignition so it functions properly. just need to remove the fuse and the pump and its plummbing. but u will have a ses light until u can get it tuned out.

  16. #16
    In need of another LS1 00blacktransam112's Avatar
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    i had the same exact problem on my 2000. i had no idea what it was but as soon as i took the AIR system out it went away. remove your AIR

  17. #17
    Member 02fbody35th's Avatar
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    yes, orion is correct i just checked mine and their is some vaccum lines behind the driver side valve cover associated with the air system that would have to be plugged.

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