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Type: Posts; User: grimmechanic

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    Finally got this project to fly in forced open...

    Finally got this project to fly in forced open loop and got a decent tune for a stock 4.0

    Now, I have a 4.6 stroker project with some cam and compression. This is an NA engine that should be...
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    Well... Ive got two other projects on my bucket...

    Well... Ive got two other projects on my bucket list that I need to finish. A 2006 Jeep LJ that I'm swapping a Rubi transfer case in, and a 1992 Dodge W250 that I'm swapping the original auto trans...
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    NGC3 forced open loop tuning

    Trying to setup a Jeep Wrangler for Jeepspeed off-road racing with forced open loop tuning (speed density). It's a 2006 TJ, 4.0 stroker. Using the original NGC3 ECM. A lot of competitors in some...
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    Well, you only have to pop the valve covers off....

    Well, you only have to pop the valve covers off. If you have the cheese-wedge tool, you can block the chain and compress the tensioner and remove the phaser(s) without pulling apart the entire front...
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    Call me batsh**t crazy...

    So, I acquired a 2004 F150, 5.4 3v, 4R75E, 4wd for $600. Has 200K miles. Trans was roasted. Engine seemed to run fine. Fortunately for me, I have a friend that sold his transmission shop and does a...
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    No joy on being able to do anything with the AW4...

    No joy on being able to do anything with the AW4 trans controller. It's separate controller ans no one seems to have figured out a way to access it. It sucks. The only option is to use a universal...
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    Depending on the fault, you may not be able to...

    Depending on the fault, you may not be able to disable the CEL. If you removed the rear O2 sensor, you'll have a fault for the O2 heater circuit. And for whatever reason, there's no option for the...
  8. It always runs in closed loop at cruise load/rpm...

    It always runs in closed loop at cruise load/rpm once the engine reaches operating temp. If you want to improve part throttle cruise mileage, force it into constant open loop and use a WB to adjust...
  9. The JTEC ECU used on Mopars from 1995-2004 is...

    The JTEC ECU used on Mopars from 1995-2004 is very simple. JTEC controllers do not have auto trans functions. Auto transmissions are controlled by a separate controller that's not...
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    Support for GM/Delphi MEFI 4/5

    I know this has been covered before, but I think there's a pretty good size market for support for these controllers (MEFI-4, 5, 6, 7). I have 3 MEFI-4's collecting dust in my shop unused. I could...
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    Drive to work this morning and the P0137 code...

    Drive to work this morning and the P0137 code popped back up. Even with both O2 sensors disabled. Funny thing is, the front O2 sensor still shows voltage in the Matco scanner, just no mixture...
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    I've reflased my ECM 3 times and have had a few...

    I've reflased my ECM 3 times and have had a few issues.

    A bit of history on the vehicle: A very stock 1999 Jeep XJ Cherokee with 4.0 engine and AW4 trans. 257,000 miles on the original engine....
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    So... I've made a few changes without the benefit...

    So... I've made a few changes without the benefit of a wideband, but I do have a portable 5-gas analyzer. Doin' a little old-school tuning.

    The changes I've made so far are:
    Disable both O2...
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    Thta's excellent! I made a few more changes to...

    Thta's excellent! I made a few more changes to mine and did some testing. I'll post what's been done on the 99 XJ thread.
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    Again try reinstalling the Beta or returning all...

    Again try reinstalling the Beta or returning all of your display settings to the defaults. The default display should have the MAP chart but the units are not in PSI. My default display does not show...
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    Performance wise, on the stock 4.0 engine, there...

    Performance wise, on the stock 4.0 engine, there isn't going to be much gain with a re-tune. Maybe a little better fuel economy by forcing open-loop and leaning out the cruise fuel. Another...
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    Non-beta version wont work right now on the...

    Non-beta version wont work right now on the 4.0's. Try reinstalling the beta version and make sure all of your drivers and firmware are updated.
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    I believe you can convert the units in the...

    I believe you can convert the units in the editor. The native units (in my Matco scanner) are PSI for the MAP sensor and that's what shows up on the HPT scanner. But in the editor, MAP is displayed...
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    So, LT and ST trims don't seem vary much on...

    So, LT and ST trims don't seem vary much on these. I've noticed this over time with my Matco scanner. The issue with your temp and baro may not be with your sensors. If the engine is running fine and...
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    Not much difference between the 97 and 99. About...

    Not much difference between the 97 and 99. About the only real difference is the intake manifold design. Other than that, I'm pretty sure damn near everything will interchange.

    In 2000, the big...
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    99 Jeep XJ

    First off, I think it's awesome that HP Tuners has added support for the 4.0 Jeeps. There are a ton of them out there, and stroker kitted 4.0's are becoming pretty common these days.

    So, I...
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