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    What the original poster suggests in this thread...

    What the original poster suggests
    in this thread
    may not be overkill if your cam and either of those PCV valves are not in sync.

    At a minimum, you may want to do some research regarding Part...
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    Check and or clean the coil wire and all the...

    Check and or clean the coil wire and all the wiring running to the Opti-Spark, including that electrical wiring harness that plugs into the Opti-Spark.
    The wiring for the H2Opump temp sensor is very...
  3. If the H2Opump is prevented from peeing on the...

    If the H2Opump is prevented from peeing on the Opti-Spark, then the best road water shield you can make would likely be the painted on coating cited in...
  4. For the H2Opump, many from the ImpalaSS Forum...

    For the H2Opump, many from the ImpalaSS Forum would install a zerk fitting into the weep hole with a rubber hose to do the same thing.

    As for the Opti-Spark, there are several things that can be...
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    1stly, yes, what space387 said; if all 8...

    1stly, yes, what space387 said; if all 8 cylinders are inhaling and compressing but only 4 are actually making power, those four will use MUCH MORE FUEL - except maybe during non-DFCO coastdowns.
    I...
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    LT1 Swap to LS 411 pcm...

    LT1 Swap to LS 411 pcm

    Although the video is 32min long for some reason, the gist of it is:
    he converted his OBD1 LT1 into an OBD2 LT1 with a 96/97 front timing cover and added wiring for the...
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    https://www.z28.com/threads/thermostat-question.15...

    https://www.z28.com/threads/thermostat-question.151566/#post-1590316Besides MotoRad & Stant, I can't think of any other brand names whose thermostats I'd...
  8. There are several vacuum lines, mostly on the...

    There are several vacuum lines, mostly on the passenger side of the manifold and throttle body (not only the PCV lines), that are either hard plastic or junky rubber.
    Many of these lines and...
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    At present, there are two different versions of...

    At present, there are two different versions of OBD1 LT1 TunerCAT.
    The 1st version is as steveo describes, with categorization limited to 'Switches' (TunerPro's Flags), 'Constants' (TunerPro's...
  10. Tory, An OBD1 pcm doesn't care if the .bin...

    Tory,

    An OBD1 pcm doesn't care if the .bin file is 94 or 95, only that it is OBD1. You can see from steveo's collection how many different OEM LT1 variants have been verified. .

    For starters,...
  11. When you changed the injectors, did the orings...

    When you changed the injectors, did the orings get changed? Those pieces of rubber are now old enough to drink, but they are often overlooked.

    When you changed the plugs, did you also change the...
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    One mechanical issue that is nearly universally...

    One mechanical issue that is nearly universally overlooked, is the idlespider.

    The throttlebody butterflies feed the two larger main holes on top which empty into their respective cylinder...
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    You should [continue to] customise the BLM RpM...

    You should [continue to] customise the BLM RpM and MAP boundaries, based on how you'd drive if you were trying to achieve better MpGs.
    The OEM boundaries are silly even for a bonestock car doing the...
  14. Your idea is correct. In the 'Shift Time Vs %TPS...

    Your idea is correct. In the 'Shift Time Vs %TPS Vs Shift, Norm, Low Alt' & 'Shift Time Vs %TPS Vs Shift, Norm, High Alt' tables, NONE of the shift times need ever exceed 0.8 secs (800msec).

    (Note...
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    Not mechanically, of course not. Nonetheless you...

    Not mechanically, of course not.
    Nonetheless you may need to make adjustments to the Main Spark Advance & Extended Spark Advance Tables under Spark Timing. Try the other stuff 1st, though.
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    On his 1st test, he was failed by HC & NO. ...

    On his 1st test, he was failed by HC & NO.

    Then he replaced his catalytic converter.

    On his 2nd test, he was failed by NO.

    He was never failed by CO.

    (It'd be cost-prohibitive and unjust...
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    You have $EEhack and a cable. Do you have...

    You have $EEhack and a cable. Do you have TunerPro, or C.A.T.S., so you can actually make changes to the .bin file?
    With $EEhack but without TunerPro, you'd be making the adjustments in realtime, in...
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    Bill 'Navy Lifer' Harper's attention to detail is...

    Bill 'Navy Lifer' Harper's attention to detail is one of the things that set the Impala SS Forum apart about a decade ago.
    ...
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    Can't tell if 2.73 or 3.23, or what gear you'd be...

    Can't tell if 2.73 or 3.23, or what gear you'd be in @ 15MpH or 25MpH.
    Anyway, based on the improvements you made from the 1st test to the 2nd, you have room to go a bit richer.
    If you're still in...
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    (You probably get that O2 sensor settings don't...

    (You probably get that O2 sensor settings don't need any adjusting.) - misspoke here
    My guess is you'd multiply the open loop AFRs by .95, since GM programmed those AFRs prior to E10, and...
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    Been asked THOUSANDS of times on the ImpalaSS...

    Been asked THOUSANDS of times on the ImpalaSS Forum.
    If you'd like to keep your ABS functional [you lucky bastaducci], you definitely have to use a 3.42 reluctor ring, or whatever reluctor ring...
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    Can't find dzidaV8's version …

    Can't find dzidaV8's version …
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    steveo, kur40, much appreciated, thanks.

    steveo, kur40, much appreciated, thanks.
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    May I ask, where are these forks located?

    May I ask, where are these forks located?
  25. Use the speedo scalars from a V4P .bin file....

    Use the speedo scalars from a V4P .bin file.
    Lowering the fan enable coolant temps under 85C / 185F (roughly under a 160F thermostat's fully open point) is pointless.
    Raising them over 100C /...
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