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  1. #1 Idle / RPM issue ** Videos ** - Need Help 
    GTP Level Member Silver2kgtp's Avatar
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    I'm having an issue with my RPM's. Here's a rundown of what I did and is happening.

    I just recently changed from an LS1 TB to a Accufab Ported TB. The reason for this is the LS1 was messing up my IAC's. At least that is what I thought.

    After I installed the ported TB, my IAC's were still messed up. I found out that the wiring for the IAC was bad so I replaced the connector and wires. Being that a wire was bad, that actually might have been the problem instead of the LS1 TB.

    Anyway with the Accufab TB installed now and IAC working good. My RPM's hang high then drop after I hit the throttle. Weither if I'm in park or driving. At idle I'm at 900-1000. After I hit the throttle the RPM's go up then instead of going back down to 900 it would hang around 1300 then drop down. This is especially annoying while driving.

    My IAC is at 47 at idle. My TPS is .5 v at idle and 4.2v at WOT.

    I don't have any vac leaks because I had a smoke test done. This is driving me crazy. I'm very tempted to put back the LS1 since the IAC wiring was bad to begin with. I want to get this RPM issue figured out first. I can't/don't see why this is happening.

    Here are a couple of vids. Sorry if they are on the big side. They are in HD and didn't have time to resize.

    Any help and/or input would be great.

    http://www.nymcgp.com/members/silver...leProblem1.mp4

    http://www.nymcgp.com/members/silver...leProblem2.mp4

    http://s1292.photobucket.com/user/si...d%20Prix%20GTP
    10.99 @ 121.99 1.74 60' (Ran out of fuel : +18 AFR)NO SPRAY!!!
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  2. #2  
    I live here. MoarkatsINmuhtrailer's Avatar
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    The iac and tps values look good, do you think it could be how you have the vacuum lines routed?

    Are you using a vac block?
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  3. #3 Re: Idle / RPM issue ** Videos ** - Need Help 
    GT Level Member RideWithPride's Avatar
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    might be a warn flexplate having trouble catching the teeth but honestly thats random ass guess
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  4. #4 Re: Idle / RPM issue ** Videos ** - Need Help 
    Moderator dsmuts's Avatar
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    Quote Originally Posted by RideWithPride View Post
    might be a warn flexplate having trouble catching the teeth but honestly thats random ass guess
    Catching teeth on what?
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  5. #5 Re: Idle / RPM issue ** Videos ** - Need Help 
    GT Level Member RideWithPride's Avatar
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    Quote Originally Posted by dsmuts View Post
    Catching teeth on what?
    haha im gonna look like a fool but where the gear connect to the flywheel, which in itself the flywheel is a gear which is mainly a circle with teeth on it or calculated jagged edges, if one becomes worn or chipped is could cause the flywheel to move more freely since it would be skipping over a tooth or edge.

    This being said i have never acctually seen/heard about this happening to a car i just grew up with bikes my whole life and seen stuff like that
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  6. #6  
    I live here. MoarkatsINmuhtrailer's Avatar
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    What cam do you have sal?
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  7. #7 Re: Idle / RPM issue ** Videos ** - Need Help 
    GTP Level Member Silver2kgtp's Avatar
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    I didn't change the routing of my vac lines. I do not have a vac block.

    All I did was swap out the TB's

    I have a stg turbo cam and I just put a meziere flexplate on.

    http://s1292.photobucket.com/user/si...d%20Prix%20GTP
    10.99 @ 121.99 1.74 60' (Ran out of fuel : +18 AFR)NO SPRAY!!!
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  8. #8  
    I live here. MoarkatsINmuhtrailer's Avatar
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    I'd put the LS1 tb back on..

    I'm really stumped on this one.
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  9. #9 Re: Idle / RPM issue ** Videos ** - Need Help 
    GTP Level Member Silver2kgtp's Avatar
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    I'm stumped too.
    Last edited by Silver2kgtp; 08-12-2012 at 04:17 PM.

    http://s1292.photobucket.com/user/si...d%20Prix%20GTP
    10.99 @ 121.99 1.74 60' (Ran out of fuel : +18 AFR)NO SPRAY!!!
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  10. #10 Re: Idle / RPM issue ** Videos ** - Need Help 
    Moderator dsmuts's Avatar
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    I'm not following what you're saying. The flywheel is attached to the tc and the motor.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  11. #11 Re: Idle / RPM issue ** Videos ** - Need Help 
    GTP Level Member Silver2kgtp's Avatar
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    Update

    Just put back the LS1 TB and still have the same issue. This is driving me nuts.

    http://s1292.photobucket.com/user/si...d%20Prix%20GTP
    10.99 @ 121.99 1.74 60' (Ran out of fuel : +18 AFR)NO SPRAY!!!
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