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Thread: Tunerpro RT $4F connection problems

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  1. #1
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    So does that mean that my VE table is crap for a motor that has been bored, different cam, headers, very free flowing exhaust, all the TB mods... basically everything has been changed except intake and heads? In other words, I got taken?

    So do you think I need to accommodate for having a cam, even if its pretty mild? My IAC count is between 20 and 30, TPS voltage is .57 (I elongated the wholes to make it adjustable) In my bin, it says "IAC-%TPS for Closed Throttle: 1.20%" should I change that to 0% since I have it adjusted to that? I always make sure its warmed up and locked into closed loop before checking anything or data logging.

    I dropped off my throttle body and a carb shop today to have new bushings put in and his response was "yeah, that thing is pretty bad" so I'm hoping my idle problems were stemming from a vacuum leak through the bushings.

  2. #2
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    yeah, with all those mods, the VE table should require some siginificant changes....
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  3. #3
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    Quote Originally Posted by RobertISaar View Post
    yeah, with all those mods, the VE table should require some siginificant changes....
    OUCH, I was taken! Looks like I paid almost $400 for a chip adapter, EEPROM and a little timing advance!

  4. #4
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    Quote Originally Posted by duecepipes22 View Post
    So does that mean that my VE table is crap for a motor that has been bored, different cam, headers, very free flowing exhaust, all the TB mods... basically everything has been changed except intake and heads? In other words, I got taken?

    So do you think I need to accommodate for having a cam, even if its pretty mild? My IAC count is between 20 and 30, TPS voltage is .57 (I elongated the wholes to make it adjustable) In my bin, it says "IAC-%TPS for Closed Throttle: 1.20%" should I change that to 0% since I have it adjusted to that? I always make sure its warmed up and locked into closed loop before checking anything or data logging.

    I dropped off my throttle body and a carb shop today to have new bushings put in and his response was "yeah, that thing is pretty bad" so I'm hoping my idle problems were stemming from a vacuum leak through the bushings.
    With 20 to 30 counts there is not a significant vacuum leak. 0 would be significant.

    TPS% is just a calculation in the data of this bin, not actual so don't worry about 1.2%, that is about correct for .57 volts

    Quote Originally Posted by RobertISaar View Post
    yeah, with all those mods, the VE table should require some siginificant changes....
    Yup...

    Quote Originally Posted by duecepipes22 View Post
    OUCH, I was taken! Looks like I paid almost $400 for a chip adapter, EEPROM and a little timing advance!
    Ouch!

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  5. #5
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    Could my erratic idle be an ignition problem then? My distributor, ignition module and coil all have 263,000 miles on them. It seems to run fine past idle and it idles smooth in closed loop and when the wire from the ecm to the distributor is unplugged. I'm crossing my fingers that there is a vacuum leak but I think I need to prepared in case the TB isn't the solution.

  6. #6
    RIP EagleMark's Avatar
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    Very well could be? I'll bet that pickup coil and connections are solid green goop, check shaft to see if loose.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  7. #7
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    The terminal on the coil was green when I replaced the plug wires about 3 weeks ago... I'm going to check it out today and hopefully test it, I'll check the dizzy while I'm at it. I'm supposed to get my TB back today so I want to do some data logging... I looked at my BLM history table and it looks like it matches up with my BIN. It has all the same numbers for my map and RPMs so it should work, right?

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