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Won't start after cam install

This is a discussion on Won't start after cam install within the 3.8L V6 Supercharged (L67)(L32) forums, part of the Engine category; I just got my motor put back in, got everything connected and hooked up, primed the oil pump, but when ...

  1. #1
    GTX Level Member Bedwards's Avatar
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    Default Won't start after cam install

    I just got my motor put back in, got everything connected and hooked up, primed the oil pump, but when I go to start it, it just cranks, stutters and "coughs" when you stop cranking off. The cough noise sounds like it comes from the intake, but I'm not sure. Here's a video of it:

    http://i82.photobucket.com/albums/j2...3/01c4a061.mp4

    And

    http://i82.photobucket.com/albums/j2...3/8b0ccd9d.mp4

    I also need help locating where this line plugs into:





    Thanks guys!

  2. #2
    GrandPrix Junkie 4THGENCAMAROFAN's Avatar
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    Default Re: Won't start after cam install

    not sure if im right but i can see on the supercharger vaccum tree your missing a line. it might go there. not sure though.
    97 Dark Mullberry Metallic GTP "Purple Haze" The pretty racekar
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    Totally Banned, bro. blueguy's Avatar
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    Default Re: Won't start after cam install

    It does.

    Plug that line into the top of the blower and see how it runs after that...you've got a decent vac leak right there.
    1998 Silvermist GT Coupe - All the N/A couldn't help it...
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    GT Level Member Deviq's Avatar
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    Default Re: Won't start after cam install

    You can see the empty port on the tree it goes into in the second pic.
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    GTX Level Member GOTIT4CHEAP16's Avatar
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    Default Re: Won't start after cam install

    yea thats where mines goes. The middle line in the red circle.

    Gen V, 3.0, Stage 2 heads, XP Cam, SD Headers, N*, LQ4, ZZP Stage 2 Gen 3 Intercooler, CAI, AL 104's Gapped to .055, #130 Springs, 42.5lb Injectors, ZZP Tune.


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    SE Level Member Tea Time's Avatar
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    Default Re: Won't start after cam install

    All of the above are right about the vacuum line, it runs ur HVAC , plug it into that tree on top the blower and hopefully blue is right about the non start, thats a nasty vacuum leak with it left unplugged.

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    GTX Level Member Bedwards's Avatar
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    Default Re: Won't start after cam install

    Thanks guys. I'll plug it in and give it a try tonight. I really hope that's the problem.

  8. #8
    I live here. Scottydoggs's Avatar
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    Default Re: Won't start after cam install

    it sounds like its back firing out the intake, have you double checked the plug wires firing order? 2 wires in the wrong place will mess you up good.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails and a bone stock engine. http://www.grandprixforums.net/scott...-gs-47574.html

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    GTX Level Member Bedwards's Avatar
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    Default Re: Won't start after cam install

    Quote Originally Posted by scottydoggs View Post
    it sounds like its back firing out the intake, have you double checked the plug wires firing order? 2 wires in the wrong place will mess you up good.
    I'll double check the spark plug wires tonight. I hope it's something simple. This is stressing me out.

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    The mod from over yonder TheOtherNick's Avatar
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    Default Re: Won't start after cam install

    Hook that back up, check plug wires, check icm ground under coil packs.
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    Pretty colours matt5112's Avatar
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    Default Re: Won't start after cam install

    Car should still run with that disconnected.

    if the brake booster line was disconnected it wont.

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    GrandPrix Junkie 4THGENCAMAROFAN's Avatar
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    Default Re: Won't start after cam install

    really cuz my camaro started with the brake booster line disconnected.
    97 Dark Mullberry Metallic GTP "Purple Haze" The pretty racekar
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    GTX Level Member Bedwards's Avatar
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    Default Re: Won't start after cam install

    So if it won't start with that line connected, and the spark plug wires are all hooked up properly, what should I look at?

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    I live here. dsmuts's Avatar
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    Default Re: Won't start after cam install

    spray a little starting fluid in it and see if it's a fuel issue.
    98 GTP 230K miles scrapped
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    I want a Volvo. Fivefingerdeathpunch's Avatar
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    Default Re: Won't start after cam install

    how about take it one step at a time, do what we have suggested then trouble shoot from there.

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    GTX Level Member Bedwards's Avatar
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    Default Re: Won't start after cam install

    Heading home now. I'll plug in the vacuum line, check the plug wires and re-connect the ground for the ICM. I'll keep you guys posted. Thanks so much for the help so far.

  17. #17
    GTX Level Member Bedwards's Avatar
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    Default Re: Won't start after cam install

    Okay I did all those steps. Still won't start. I am still getting that "coughing" noise out of the intake (I think). I have a fuel pressure of about 40 to 45 psi with the key in the "on" position. I also tried holding my foot on the gas, it didn't do anything.

  18. #18
    Banned SnowFlake's Avatar
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    Default Re: Won't start after cam install

    Are you sure your wires aren't backward? The #1 cylinder is in the front left, closest to the coil packs.

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    I want a Volvo. Fivefingerdeathpunch's Avatar
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    Default Re: Won't start after cam install

    everything is plugged in?

    maf, map, etc etc

    SMGPFC Member #1

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    Default Re: Won't start after cam install

    have you checked for spark yet? double checked all the grounds are bolted up? starter wires hooked up right?

    in the vid the battery sounds a little weak.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails and a bone stock engine. http://www.grandprixforums.net/scott...-gs-47574.html

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