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Thread: LQ4 intake swap for a 4 bolt 90 mm TB

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  1. #1
    Join Date
    Sep 2007
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    Broken Bow, OK
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    I got mine on adjusted the idle and got it right. Now I needed to do some logging and tuning.

  2. #2
    Join Date
    Apr 2009
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    Lafayette, La.
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    63
    What's the pn for the truck manifold? Are there any other mods required beside the xlink tb adapter for the 90mm tb? What about the fuel rail? Can I use the one from my truck or do I need one for an LS2?
    Last edited by genXhunter; 04-12-2010 at 10:38 PM.
    2006 Chevy Silverado Crew Cab Z-71 5.3L, Custom Tune, Volant CAI, 4.10 gears, pacesetter LT's, Y-pipe, high flow cats, comp cam 202/212 500/507 cam, magnaflow muffler, msd coil packs, 1.8 rockers, 31lb injectors

  3. #3
    Join Date
    Apr 2009
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    Lafayette, La.
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    OK, I found a 90mm truck intake from a trailblazer SS and I already had a 4 bolt TB from the same application. The intake comes complete with fuel rails and injectors but the plugs on the injectors look different from the ones on my 2006 5.3L. Is that an optical illusion or am I going to need another adapter? Beside the Xlink adapter for the TB and a new tune, what else will I need to make the to the 90mm setup?
    2006 Chevy Silverado Crew Cab Z-71 5.3L, Custom Tune, Volant CAI, 4.10 gears, pacesetter LT's, Y-pipe, high flow cats, comp cam 202/212 500/507 cam, magnaflow muffler, msd coil packs, 1.8 rockers, 31lb injectors

  4. #4
    Join Date
    Nov 2007
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    THE MEAN STREETS OF OKLAHOMA
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    splice the wires together.
    THEY CALL ME G.

    AZRAEL

    2017 RZR 1000 2 SEATER
    2023 RZR 1000 XP 4
    2008 LTZ DURAMAX 3500
    2023 300S 5.7
    2023 BUICK ENCORE[/B]

    The difference between winning and losing, is having a 2nd stage.

  5. #5
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    Apr 2009
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    Lafayette, La.
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    Splice what wires together? Mine has 8 pins and the new TB connector has 6 pins. Two wires are not being used, just don't know which two. Are you talking about the TB or the injectors?
    2006 Chevy Silverado Crew Cab Z-71 5.3L, Custom Tune, Volant CAI, 4.10 gears, pacesetter LT's, Y-pipe, high flow cats, comp cam 202/212 500/507 cam, magnaflow muffler, msd coil packs, 1.8 rockers, 31lb injectors

  6. #6
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    Sep 2007
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    Quote Originally Posted by genXhunter View Post
    Splice what wires together? Mine has 8 pins and the new TB connector has 6 pins. Two wires are not being used, just don't know which two. Are you talking about the TB or the injectors?
    He is talking about splicing the injector connectors on, which you can do or buy adapters.
    It is one of the 5v and one of the reference wires that get left out, but you have to have the xlink for a 03-07 classic.

  7. #7
    Join Date
    Nov 2007
    Location
    THE MEAN STREETS OF OKLAHOMA
    Posts
    11,120
    THEY CALL ME G.

    AZRAEL

    2017 RZR 1000 2 SEATER
    2023 RZR 1000 XP 4
    2008 LTZ DURAMAX 3500
    2023 300S 5.7
    2023 BUICK ENCORE[/B]

    The difference between winning and losing, is having a 2nd stage.

  8. #8
    Join Date
    Apr 2009
    Location
    Lafayette, La.
    Posts
    63
    I measured the injector height and they measure the same and fit in the TBSS fuel rail so I guess I will just use mine on the new intake. I don't have the plugs for the ones that came with the intake anyway. I am waiting on my throttle body adapter plug (from torque rush) to come in and then I'll be ready to install the larger intake & tb. Hopefully that will happen this weekend. If the 88mm intake and tb doesn't help, it might be time for a 6.0L ( or 6.2)!
    2006 Chevy Silverado Crew Cab Z-71 5.3L, Custom Tune, Volant CAI, 4.10 gears, pacesetter LT's, Y-pipe, high flow cats, comp cam 202/212 500/507 cam, magnaflow muffler, msd coil packs, 1.8 rockers, 31lb injectors

  9. #9
    Join Date
    Apr 2009
    Location
    Lafayette, La.
    Posts
    63
    Ok. Got the plug in and plugged it into the 90mm TB loose to make sure it would work. It worked great until I got to full throttle and it shut down and sent a reduced engine power dash light. I had this same problem when I tried to put an 80mm BBK TB on my engine. Would not be able to open all the way before it tripped the reduced engine power shutdown. Thought it was something with their TB setup but now I am thinking otherwise. Has anyone else encountered this problem and is there an easy fix? The last time we had looked in the tune, the TPS was trying to read past 100% which triggered it. Anybody???????
    2006 Chevy Silverado Crew Cab Z-71 5.3L, Custom Tune, Volant CAI, 4.10 gears, pacesetter LT's, Y-pipe, high flow cats, comp cam 202/212 500/507 cam, magnaflow muffler, msd coil packs, 1.8 rockers, 31lb injectors

  10. #10
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    Are you using the DrX ?

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