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  1. Replies
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    I can't speak for a 2018 truck motor but for me,...

    I can't speak for a 2018 truck motor but for me, no need to remove the intake manifold. It would not be the first time that a brand new fuel injector failed soon after installation.

    Rick
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    150

    Fuel injector . . . bad impedance, possibly high....

    Fuel injector . . . bad impedance, possibly high. Find its stock value and then measure yours with a multimeter. I recently had one at 68 ohms rather than the spec value of 12 ohms that only caused...
  3. Hello, I'm certainly no expert here but it...

    Hello,

    I'm certainly no expert here but it does not look all that bad to me. I don't see any knock reduction - this is a good thing. Your Long Term Fuel Trims settled out to -10 after being...
  4. How "bad" does it run after warm up? Too rich?...

    How "bad" does it run after warm up? Too rich? Won't accelerate? Won't idle? What, exactly, is the problem? This will narrow down where to look inside your tune but an HP Tuners log file recorded...
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    2,702

    A lot depends on your operating system inside the...

    A lot depends on your operating system inside the PCM, what PCM you have and how much of the donor vehicle AC wiring makes the trip into the swapped vehicle. You can't just put in a few E-fan "on"...
  6. Replies
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    Or why not do your PCM update work using a bench...

    Or why not do your PCM update work using a bench harness with a well regulated, 13.8 VDC power supply?

    Rick
  7. Replies
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    178

    The voltage standard on these vehicles is 13.8...

    The voltage standard on these vehicles is 13.8 VDC, not 16.72. There are upper voltage limits to electronic components and perhaps you have found that limit.

    Rick
  8. Replies
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    412

    Do you have the dual circuit brake light switch...

    Do you have the dual circuit brake light switch that controls power to the TCC? PSI Conversions sells one for $23 plus shipping that replaces the single circuit switch installed above your brake...
  9. I currently have a random misfire on cylinder 7 -...

    I currently have a random misfire on cylinder 7 - DTC P0307. Likely caused by a fuel injector gone bad with a very high 68 ohm impedance rather than the standard 12 ohm impedance - I will change...
  10. Replies
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    At 58 PSI at the rails, it is very unlikely that...

    At 58 PSI at the rails, it is very unlikely that fuel can boil at that pressure at typical underhood temperatures.

    Rick
  11. Replies
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    Some of these PCM's have a pin under the lid that...

    Some of these PCM's have a pin under the lid that can be grounded during initial power application that puts the PCM into a brief, fifteen second or so recovery mode. Gotta' be on a bench harness...
  12. Replies
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    Typically, the 1999 PCM devices already have...

    Typically, the 1999 PCM devices already have transmission support built into the PCM operating system. So no separate TCM is required. However, tire height for your Jeep will need to be input plus...
  13. Spare PCM's are cheap in the yards. Going for...

    Spare PCM's are cheap in the yards. Going for $38 around here. Its good to have a spare or two for diagnostic purposes.

    Rick
  14. Replies
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    245

    Starting over can be a good strategy. I have...

    Starting over can be a good strategy. I have discovered that making incremental changes and saving my file often using different file names gives me a get out of tune jail card - I can always revert...
  15. Any codes? Can you post your tune and an engine...

    Any codes? Can you post your tune and an engine running log?

    Rick
  16. These are on the blue connector. Rick

    These are on the blue connector.

    Rick
  17. Is this a trick question? With the two 896 PCM's...

    Is this a trick question? With the two 896 PCM's of that era that I own, as long as it is grounded at Pin 1 and Pin 40 and with 12 volt ignition power at Pin 19 and full time 12 volt power at Pin 20...
  18. Replies
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    Hello, Here you go. I have never needed to...

    Hello,

    Here you go. I have never needed to do this but I'm told you only have about 15 seconds after grounding to get going on the rewrite attempt. Otherwise, you will need to ground it again....
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    It might be possible that somebody tuned your...

    It might be possible that somebody tuned your "locked" PCM before you got it with a "tuner locked" operating system. If this is the situation, you would need that guy's password to get in.

    Rick
  20. Replies
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    You can take your PCM to the dealership and they...

    You can take your PCM to the dealership and they will upgrade it for you with their Tech2 device. I have no idea what that would cost but once it is loaded onto your PCM, HP Tuners can manipulate...
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    Hello, Swapping the end pieces?? I had no...

    Hello,

    Swapping the end pieces?? I had no idea. Thank you and I learned something today.

    Rick
  22. Replies
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    The green connector port on my lab rat P59 won't...

    The green connector port on my lab rat P59 won't allow it to mate with my 0411 or 896 PCM style of wiring harness. How did you manage to get a P59 to lash up with an older P01 style of wiring...
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    See if another device can read it for trouble...

    See if another device can read it for trouble codes. If a cable-equipped code reader or a Bluetooth code reader can read it then its not bricked.

    Rick
  24. I use "Adel" clamps for a lot of things on GM...

    I use "Adel" clamps for a lot of things on GM vehicles. EBay has them, probably also Amazon and they hang on the rack at my local NAPA Auto Parts.

    Rick
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    Are you running a cold air intake? How about a...

    Are you running a cold air intake? How about a K&N air filter? I over-oiled my K&N which fogged the little heated MAF wires that then drove my MAF bonkers that then drove my LTFT nutty. Cleaning...
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