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Weird Shutter

This is a discussion on Weird Shutter within the General Help forums, part of the LSx Technical Help Section category; Last few times I've been out shaking down the car after having the complete drive train built. In my signature ...

  1. #1
    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
    98 T/A w/a little mods...

    Weird Shutter

    Last few times I've been out shaking down the car after having the complete drive train built. In my signature has all the mods current on car.

    So at low rpms (1500-2000) I get a shutter that is hard to describe. It's like the something is kinda binding or slipping but goes away if I disengage the clutch or increase rpms or load the drive train while accelerating. It's not chatter and I don't feel any "clutch slippage". Also no howling from rear end.

    Any ideas? I plan on lifting it up and going over all the bolts to re-tighten.

    I think I need to film it to show what I mean.
    Last edited by SMWS6TA; 06-10-2015 at 10:01 AM.

  2. #2
    She-Member jrbonds's Avatar
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    2002 WS6
    1965 Mustang

    Mine does this also. I believe it's the horsepower and maybe that cam that causes it. Lol

    But honestly, idk. I thought it was normal.

  3. #3
    Spaz is My Mentor SMWS6TA's Avatar
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    something tells me to check the pinon angle again....
    http://www.ls1.com/forums/f7/my-6-liter-build-174257/

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    6.0L Block - Forged 403 built, breaking it in , Polluter Stg3 Cam, FAST 102mm Intake, NW102 TB, MSD wires, NGK TR6 plugs, Truck Coil Packs, LS3 Fuel Injectors, CC Pacesetter LT Headers, TS&P ORY, QTP e-Cutout, Magnaflow Muffler, 104mm Air Lid & Line Lock, Catch Can, Stage 2 T56 w/Viper shaft, PRO 5.0 Shifter, Tick MC, Monster Stg 4 Clutch, QT SFI BH, MWC DSL, UMI: SFC, PHB, LCA's, LCA Relocation Brackets & TA, Hotchkis Springs (1" Drop), YR1 Snowflake Wheels wrapped in NT555 tires & Custom Fab Ford 8.8 rear w/4.10 Yukon Gears, WSQ Hood, 3"CM Strange Eng Drive Shaft.

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  4. #4
    She-Member jrbonds's Avatar
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    2002 WS6
    1965 Mustang

    Yeah I would. I haven't even set mine yet.

    But I just made an appointment to have it done tomorrow after work.
    Last edited by jrbonds; 06-10-2015 at 01:04 PM.

  5. #5
    Moderator 35th-ANV-SS's Avatar
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    So it happens only when the clutch is still engaged, but stops when you disengage it? How much shutter exactly? A little or is the whole car shaking?
    It's on jackstands.

  6. #6
    Spaz is My Mentor SMWS6TA's Avatar
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    Weird Shutter

    Whole car shaking, like when you dump clutch at low rpm and not enough gas (like a beginner on using a clutch). <<Im not for the record.

  7. #7
    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
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    Well I found my strange noise but this wasn't the feeling I was mentioning above.









    The shutter I think I figured out that it's because of the cam load and stroke of the engine. I showed it to one of the local club guys and he said that his does this too.

  8. #8
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    Are you MAF or speed density?

  9. #9
    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
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    Weird Shutter

    SD tune...

  10. #10
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    Sounds like maybe lean surge.

  11. #11
    Senior Member bigrondownhiller's Avatar
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    Does it do it in every gear or only one?

  12. #12
    Spaz is My Mentor SMWS6TA's Avatar
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    I'll post a video once the bearing issues are fixed.

  13. #13
    Member werewolf's Avatar
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    Quote Originally Posted by pajeff02 View Post
    Sounds like maybe lean surge.
    I am getting a shudder that acts like the car is loading up at steady state cruise. I have long tube headers and ORY could the o2 sensors or extensions be causing this issue some how? The car was tuned with HP Tuners by Midwest Street Cars. It started this recently so I assume the tune is ok. Any recommendations? It does clear up with added throttle but the police will only overlook so much lol

  14. #14
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    Our shudder was a MAF issue when we purchased the car. Easy test is to unplug the MAF (which will light up the SES) and see if the shudder goes away. If it does, first try cleaning the MAF before replacing any parts. Do you have access to a scanner that shows live engine sensor data? If so, a dead or slow O2 sensor is pretty easy to spot.

  15. #15
    Member werewolf's Avatar
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    Sadly no but would take recommendations as I would love to get one. I will try the maf test on the way home tomorrow and then move to replacing the o2s. Thanks for advice disnt even consider maf

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    Member werewolf's Avatar
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    well I got a p1133 code on the way home today. didn't feel any loading like I have but I had the AC on so not sure how that effected engine loading. I cleaned the MAF just now regardless but would I be wrong in thinking this has to do with the O2 sensor or Extension cable?

  17. #17
    Moderator 35th-ANV-SS's Avatar
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    I'd agree with that.

  18. #18
    Member werewolf's Avatar
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    I guess switching to 13111's would be better than risking the extension cables are the problem so two new O2 sensors yay me. thanks for the help on this and sorry for the thread jack

  19. #19
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    ^^ Let us know if that fixes things for you.

  20. #20
    Member werewolf's Avatar
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    will do. Going the get the sensors after I mow the yard. Unless one of you kind gentlemen would like to do that for me LOL

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