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  1. Do you know if the engine ran before you got it?...

    Do you know if the engine ran before you got it?

    If you don't know, I'd check the rail pressure to make sure it builds and you don't have a bad injector.

    Then I'd change the cam and crank...
  2. Update: I measured the pressures as per the...

    Update: I measured the pressures as per the service manual...all good except the OD pressure. Switch to OD on and pressure barely rises to 15psi.

    Possible OD solenoid but probably a cooked...
  3. Now Overdrive Fail

    Update: Unless the trans solenoid connector is bad (And I cleaned the crap out of it) the electronics/wiring are not at fault.

    I ran the truck while monitoring the low active outputs for the TCC...
  4. Ok so on to look for what's going on with the...

    Ok so on to look for what's going on with the overdrive.

    There is a chance that it had nothing to do with the tuning of course, and it just happened to work fine for the last 12 months, but then...
  5. No, for adding zero value, not helping with any...

    No, for adding zero value, not helping with any of the original questions I had and taking cheap shots wherever possible.

    You are not welcome here.

    Please leave and don't come back to this...
  6. You are way too emotionally invested in this and...

    You are way too emotionally invested in this and should take a step back. Sounds like you have experience in this single platform. Big fish small pond buddy.

    Where is the moderator on this forum?...
  7. Jim P: I've seen lots of your posts and you help...

    Jim P: I've seen lots of your posts and you help lots of people out. This is great. You've tried to help me out in the past as well. But I didn't like your unnecessary comments above. I don`t know...
  8. Ok, back to the truck... I had some success. ...

    Ok, back to the truck...

    I had some success.

    I really should have taken this process step by step to make the troubleshooting more definitive, but I can't really afford the time at the moment....
  9. You're right, it's my fault for not seeing that...

    You're right, it's my fault for not seeing that in the hours and hours of reading I've done here.

    It's my fault that it's not in the user write up from HP Tuners.

    Any idea on how to get the...
  10. Bad Luck?

    MAIDENCR, can I ask what version of VCM Editor and Scanner you are running?

    I'm getting frustrated with this process-I got stuck at the gas station the other night because I tried to flash the...
  11. I wish I could. The channel is not available. ...

    I wish I could. The channel is not available.


    Chay
  12. I did a bit more digging. I can't figure out what...

    I did a bit more digging. I can't figure out what I messed up. I don't know how to tell if the extended datastream os has been applied properly or not.

    I did find something interesting-If I add a...
  13. I'm pretty sure I did-At least I tried to. I...

    I'm pretty sure I did-At least I tried to.

    I chose the OS button and the extended data stream then renamed it, close it and opened the renamed file then wrote all as per the instructions.

    Did...
  14. 2003 ECM-Can I view pilot/post timing values??

    Hi all.

    I'm trying to tune my pilot timing-When the truck is fully warm (Towing heavy), I'm still getting some pop around 2000 rpm in the mid power ranges.

    So I'd like to make sure that what...
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    Yeah the fan output works! Pin C1-42, low...

    Yeah the fan output works!

    Pin C1-42, low active. This means I can use exactly the same setup as my tach for resistors. When the voltage is high, the use the low temp curve, when it is 0, use the...
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    A few notes for those who may be following this....

    A few notes for those who may be following this.

    Tach:

    The tach signal is low active. Without a pullup resistor you get nothing. For the 5V input on the PIC what I did was run 12V to a 2k2...
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    DIY Guage Pod for Gen3 GM

    Hi all. I'm putting a pair of LQ4s in my boat. Things are going good with the first one-running well on land at least, converted to 1 bar speed density. Tuning is yet to be performed, but it's idling...
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    Cobalt, i missed that you drew a diagram---thanks...

    Cobalt, i missed that you drew a diagram---thanks for that-I will review it.

    Chay
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    Thanks. Lots of fun! First, thanks for taking...

    Thanks. Lots of fun!

    First, thanks for taking the time to reply. The setpoints and hysterisis are easy enough to understand-I'm a electrical control technologist-I work with hysterisis, Logic,...
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    PE Tuning Logic

    Hi all. After a bunch of research I'm familiar with the settings and what they do, but not how they interact.

    I'm tuning a LQ4 6.0. Originally I had the sock OS, but have upgraded to the 1 bar...
  21. Ahhh yes. Thanks very much Chay

    Ahhh yes. Thanks very much

    Chay
  22. Set to open loop: 1 Bar Enhanced Speed Density Operating System

    Hi all.

    I have transplanted a LQ4 into my boat and now it's time to tune.

    I have a wideband O2 and intend to use it to tune. I have read and implemented the EGR position input in the scanner....
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    Thanks for the info. I went ahead and made...

    Thanks for the info.

    I went ahead and made the change to the 50% map.

    The engine is WAYYY smoother and quieter across the entire range. Even my 12 year old commented on the difference.
    ...
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    Attachments...

    Attachments...
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    Yeah that's probably true. However the only...

    Yeah that's probably true.

    However the only difference in the fuel delivery maps between the 2003/04 and 2004.5+, really, is the timing, so i think it must reside there.

    Or possibly in the ECT...
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