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    Throttle kicker works. I don't see any place...

    Throttle kicker works. I don't see any place where you can adjust the throttle blades on this unit... The one on my '87 had a little cap you had to knock out with a set screw under it... This one has...
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    No ideas?

    No ideas?
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    It's very consistent which is why I assumed the...

    It's very consistent which is why I assumed the iac was doing its thing. I did have my autoprom hooked to it and the dash tach read ~100 rpm higher than the data stream indicated. Coolant temp showed...
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    I will have to look

    I will have to look
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    How would you know if its working?

    How would you know if its working?
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    1995 454 High idle

    I recently picked up a 95 suburban. Tbi 454/ 4l80e.

    Nice truck. I've been working on catching up some maintenance and a few things the PO had let go. I have it in pretty good shape except for the...
  7. Thread: 454 tbi mods?

    by Xenon
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    Good info guys. Thanks

    Good info guys. Thanks
  8. Thread: 454 tbi mods?

    by Xenon
    Replies
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    33,995

    454 tbi mods?

    I'm sure this has been covered but I can't seem to turn up anything in a search.

    Just got a 1995 GMC suburban 2500 with the 454 a while back. Just got it cleaned up and started driving it some...
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    thanks. That's what I needed to know

    thanks. That's what I needed to know
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    well I've been looking around more and I really...

    well I've been looking around more and I really like this one you suggested.

    How do I know if I need to have it ground on a small circle? And do I need different springs, pushrods or anything? Or...
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    Not sure on the pistons, but it measures to 8.6:1...

    Not sure on the pistons, but it measures to 8.6:1 compression with 76cc heads, so they're not too special.

    Don't remember what the heads are exactly, but I remember looking up the casting number...
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    Really appreciate all the information... I do...

    Really appreciate all the information... I do have it tuned for the 454 injectors... Eagle Mark and others here helped me out with that. Runs as well as it can given the current setup.

    If you...
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    Wrote to comp cams for a recommendation and this...

    Wrote to comp cams for a recommendation and this was their reply:

    A cam that best fit your mods is our xtreme energy cam (12-262-4)specs are below. The cam will have to be on a small base circle...
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    Thanks for the input everyone. Im running...

    Thanks for the input everyone.

    Im running 3.73 gears with 285/70/17 tires. I'm running the 350
    throttle body with 454 injectors in it, so fueling isn't a problem.

    What at is the story with...
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    Ok, thanks

    Ok, thanks
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    Never done a compression test... Idle vacuum is...

    Never done a compression test... Idle vacuum is pretty low though, about 12-14 in/hg
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    Don't remember the casting number for sure, but I...

    Don't remember the casting number for sure, but I cc'd everything when I got it and figured it was 8.6:1 compression.

    Only reason I'm figuring it has a cam for a lighter application is the...
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    Id be all for that... Open to all suggestions......

    Id be all for that... Open to all suggestions... :happy:
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    Ok, thanks for the help!

    Ok, thanks for the help!
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    Ok, got a few minutes of in gear idle and a few...

    Ok, got a few minutes of in gear idle and a few in park. If you need something else lemme know.

    Thanks!
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    Oops! And I know that! Always one minute of drive...

    Oops! And I know that! Always one minute of drive and one minute of park

    will do that and post up shortly. Thanks.
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    Well I made a datalog, but it didnt do it as bad...

    Well I made a datalog, but it didnt do it as bad as it has been, I'm guessing because its warmer out today?

    Even once its warmed up it doing it though... Idling at 850 when target is 625.

    This...
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    Will do. Thanks.

    Will do. Thanks.
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    Maybe its normal then... It's mainly when its...

    Maybe its normal then... It's mainly when its cold... Seems to be not as bad once warmed up. It's just kind of maddening to stop for coffee on the way to work and have it sitting there revved up to...
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    Have a little problem lately... It idles perfect...

    Have a little problem lately... It idles perfect in drive, but in park and neutral it idles high (8-900). It's always done this a little, but its gotten worse recently, to the point that after...
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