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Thread: 2005 Tahoe ppv lq4 swap questions

  1. #71
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    We are back at it- idle pressure

    99 ECSB 1500 6.0 lq9/243 2wd 3.42 in the works.
    Efans - CAI - Walbro 255lph - Eaton LSD
    BTR STAGE 3 truck cam - 60lb Inj - MP122HH
    FLT Level 5 - 3000 SC YANK
    Pacesetter LT's - ORY
    13.170 @ 103.33 Mph -

  2. #72
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    He took it for a drive last night no pressure drops, he's doing it again tonight to see if anything happens

    if we don't get any results of pressure drops whats our next move?
    99 ECSB 1500 6.0 lq9/243 2wd 3.42 in the works.
    Efans - CAI - Walbro 255lph - Eaton LSD
    BTR STAGE 3 truck cam - 60lb Inj - MP122HH
    FLT Level 5 - 3000 SC YANK
    Pacesetter LT's - ORY
    13.170 @ 103.33 Mph -

  3. #73
    Joe (Moderator) joecar's Avatar
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    Ok, rail pressure is good (I take it you have an un-referenced FPR, I forgot already)...?


    Next step: are all the injector tables correct...?

  4. #74
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    The fuel pressure we never checked at first- then there was a lean spot while cruising at around 2000rpms and 20% TPS both O2 sensors showed extreme lean and WB showed 5.4 lambda which I didn't think it could go that high. I posted a pic of the graphs in previous page. Jet pointed it out. You also recommended to double check. (Just bringing you back up to speed seeing it's been 3-4 weeks)

    It's the stock injectors for the 5.3 flex fuel that came on the truck from factory. We didn't change anything.
    99 ECSB 1500 6.0 lq9/243 2wd 3.42 in the works.
    Efans - CAI - Walbro 255lph - Eaton LSD
    BTR STAGE 3 truck cam - 60lb Inj - MP122HH
    FLT Level 5 - 3000 SC YANK
    Pacesetter LT's - ORY
    13.170 @ 103.33 Mph -

  5. #75
    Joe (Moderator) joecar's Avatar
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    Ok can you post a new log, or what Jetmech wants you to do...

  6. #76
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    Ok no pressure drops in fuel
    Here's one log its kind of lengthy
    Attached Files Attached Files
    99 ECSB 1500 6.0 lq9/243 2wd 3.42 in the works.
    Efans - CAI - Walbro 255lph - Eaton LSD
    BTR STAGE 3 truck cam - 60lb Inj - MP122HH
    FLT Level 5 - 3000 SC YANK
    Pacesetter LT's - ORY
    13.170 @ 103.33 Mph -

  7. #77
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by Trxmxzx View Post
    Ok no pressure drops in fuel
    Here's one log its kind of lengthy
    That is pretty good...

    there are 2 almost-WOT areas where WO2BEN goes above 1.05, see if you can fix this in MAF and/or VE (manually by hand).

    LTFT's are close (not far from zero)... on closed throttle they wander a little but that's ok.

  8. #78
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    Are those lean spots where he hit his rev limiter? Due to stall converter? Fuel shut off

    I need to adjust it in the settings and couldn't confirm the correct method- do I lower the desired rpm threshold about 1000rpm? For inbetween shifts?
    99 ECSB 1500 6.0 lq9/243 2wd 3.42 in the works.
    Efans - CAI - Walbro 255lph - Eaton LSD
    BTR STAGE 3 truck cam - 60lb Inj - MP122HH
    FLT Level 5 - 3000 SC YANK
    Pacesetter LT's - ORY
    13.170 @ 103.33 Mph -

  9. #79
    Joe (Moderator) joecar's Avatar
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    Just increase the MAF a little in those spots, and try to blend the surroundings, then take a log and see if it does the same.

  10. #80
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    Quote Originally Posted by joecar View Post
    Just increase the MAF a little in those spots, and try to blend the surroundings, then take a log and see if it does the same.
    MAF is still shut off friend- or are you saying add more air in the MAF so I can go back to using it and take a log?!?
    99 ECSB 1500 6.0 lq9/243 2wd 3.42 in the works.
    Efans - CAI - Walbro 255lph - Eaton LSD
    BTR STAGE 3 truck cam - 60lb Inj - MP122HH
    FLT Level 5 - 3000 SC YANK
    Pacesetter LT's - ORY
    13.170 @ 103.33 Mph -

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