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    Thread: Definately have an issue with my unitronic tune. chime in unitronic

    1. Moderator groggory's Avatar
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      05-22-2012 01:01 AM #51
      Re wire those those puppies!

      As a double check... Did you verify the wire colors matched that you were testing continuity on?

      Don't forget appropriate heat and abrasion sleeving. Solder joints with heat shrink
      Last edited by groggory; 05-22-2012 at 01:16 AM.
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    2. 05-22-2012 04:00 AM #52
      Yes, i tested them multiple times. I will be waking up early to go to the parker store and get a oil restrictor for my buddies 2nd gen eclipse 6267, and then i will be buying heat shrink and some more insulation for the wiring.

      Shoul i just cut, and make 2 points, or should i use a tool to pull the pins out and wire the new ones in? It would be a hell of a lot easier to cut and solder. Think thats what ill do then ill checl the resistance. Hopefully this works out :-) thanks man, ill buy u a beer if we ever meet
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    3. Moderator groggory's Avatar
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      05-22-2012 04:06 AM #53
      Quote Originally Posted by Mindfault View Post
      Yes, i tested them multiple times. I will be waking up early to go to the parker store and get a oil restrictor for my buddies 2nd gen eclipse 6267, and then i will be buying heat shrink and some more insulation for the wiring.

      Shoul i just cut, and make 2 points, or should i use a tool to pull the pins out and wire the new ones in? It would be a hell of a lot easier to cut and solder. Think thats what ill do then ill checl the resistance. Hopefully this works out :-) thanks man, ill buy u a beer if we ever meet
      Awesome. I'm not one to turn down beer.

      I would snip the wires about 10 inches from the ECU and about 5 inches from the o2 sensor plug. That's what I did. I ran them in their own heat sleeving and then wrapped that sleeving in some corrugated tubing. Then ran that in parallel with the OEM o2 sensor loom.

      Make sure to zip tie them together plenty. The turbo is near there and it's toasty warm.

      I have a feeling this is going to fix your problem.
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    4. 05-22-2012 04:16 AM #54
      I ****ing hope so man, this has been a long time coming, if i wasnt so busy/lazy i would have done this a longggg time ago. We will see though. And if that is the case i have 3 extra good ecu's lol. Thanks a ton man. I will post in the afternoon about it. Its gonna be hot as satans ******* tomorrow too :-/ but all good if she runs right!
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    5. Moderator groggory's Avatar
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      05-22-2012 05:01 AM #55
      Quote Originally Posted by Mindfault View Post
      I ****ing hope so man, this has been a long time coming, if i wasnt so busy/lazy i would have done this a longggg time ago. We will see though. And if that is the case i have 3 extra good ecu's lol. Thanks a ton man. I will post in the afternoon about it. Its gonna be hot as satans ******* tomorrow too :-/ but all good if she runs right!
      That's awesome. I potentially diagnosed your weird ass issue after you went through all those ECU's :-p
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    6. 05-22-2012 05:05 PM #56
      Yeaup. I have continuity to both connectors now, now i will log and see if the o2 sensor is reading
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    7. Moderator groggory's Avatar
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      05-22-2012 05:12 PM #57
      Quote Originally Posted by Mindfault View Post
      Yeaup. I have continuity to both connectors now, now i will log and see if the o2 sensor is reading
      Awesome. Note, if you're been running really rich there is a good chance your o2 sensor is all gunked up. You may need to replace the front o2.

      Let's see some logs of

      Start the car up and drive the car around til it's up to operating temps while running this log...

      block 001/ 031 / 032

      Then do two third gear pulls

      pull 1,2 : block 001/ 031 / 032

      then do two third gear pulls

      pull 3,4 : block 002/ 031 / 115

      ...let's see how things are looking. Post up the complete raw data.
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    8. 05-22-2012 07:01 PM #58
      Alright, will do. Im trying to get ahold of a computer now
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    9. 05-22-2012 08:13 PM #59
      Well, block 031 is still showing 1.0 on both of the columns:-/
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    10. 05-22-2012 10:18 PM #60
      meh.. :-(

    11. 05-23-2012 12:04 AM #61
      So what do you think groggory?
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    12. Moderator groggory's Avatar
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      05-23-2012 01:03 AM #62
      Key on the car with o2 electrically unplugged.

      Check voltage from ground to o2 sensor pin 3

      Check voltage from o2 sensor pin 3 to 4

      Report back

      Also, were you looking at block 031 with the engine running for a couple minutes?
      Last edited by groggory; 05-23-2012 at 01:08 AM.
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    13. 05-23-2012 01:14 AM #63
      Okay. I will check thanks bud
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    14. 05-23-2012 01:15 AM #64
      Yeah it was running for awhile
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    15. 05-23-2012 06:11 PM #65
      Okay, here is the outcome. Pin 3 to ground is 3.24 volts, and pin 3 to 4 is .736v
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    16. Moderator groggory's Avatar
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      05-23-2012 06:15 PM #66
      Quote Originally Posted by Mindfault View Post
      Okay, here is the outcome. Pin 3 to ground is 3.24 volts, and pin 3 to 4 is .736v
      Looks like you need to go find out what junction 87A is. Your o2 header positive wire is not receiving 12V. Without the heater you will continually fry o2 sensors. The heater is required to get the sensing element up to temps quickly. Without the heater exhaust gases will kill the sensor.

      Your mission. Trace out the Blue/Red wire and find the elusive junction 87A. Figure out how to get 12V to the blue/red wire at key-on. Being that you are getting 3.24V to the wire it makes me believe that there is a corroded or loose terminal, damaged wire in terminal, bad relay contact, or corroded loose fuse somewhere.
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    17. 05-23-2012 06:39 PM #67
      ahhh. this is craziness. where the hell is 87A? is it infact a relay?

    18. 05-23-2012 06:40 PM #68
      without the heating circuit, the o2 sensor should still read a/f ratio though

    19. Moderator groggory's Avatar
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      05-23-2012 06:53 PM #69
      Quote Originally Posted by SmallHP View Post
      without the heating circuit, the o2 sensor should still read a/f ratio though
      Theoretically it works. I don't know of anyone who knowingly runs a wideband o2 sensor without a heating circuit. lol.

      My vote goes to figuring out where the blue/red wire goes in the loom.

      From memory, I think I saw it runs under the window cowling, under the ECU, down the waterfall plenum, and I'm not sure where it goes from there. So go look in your waterfall plenum and see if you see the blue/red wire in there.
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      Welcome to the world of racing! Budgets are ALWAYS exceeded, deadlines are never met, end-goals never reached, and wives always unhappy... it's all worth it though!

    20. 05-23-2012 07:20 PM #70
      im pretty sure it goes into the box next to the waterfall. the one with i think 2 relays in there. and it seems like the junction is a relay, because it says "87a" which is a leg of a relay. but it's so F'ing hot here. i dont wanna be outside tearing thrtough wiring harnesses. haha. this is just crazy though

    21. 05-23-2012 07:22 PM #71
      ill be looking for that thing forsure though probably tonight after the get together

    22. Member Vegeta Gti's Avatar
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      05-23-2012 07:25 PM #72
      soooo....hardware/component issue.not software...

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      What vegeta said.

    23. Moderator groggory's Avatar
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      05-23-2012 07:26 PM #73
      Quote Originally Posted by SmallHP View Post
      im pretty sure it goes into the box next to the waterfall. the one with i think 2 relays in there. and it seems like the junction is a relay, because it says "87a" which is a leg of a relay. but it's so F'ing hot here. i dont wanna be outside tearing thrtough wiring harnesses. haha. this is just crazy though
      When you trace it out, please snap a pic and post it up. This could be very handy for other people out there.
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    24. Moderator groggory's Avatar
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      05-23-2012 07:26 PM #74
      Quote Originally Posted by Vegeta Gti View Post
      soooo....hardware/component issue.not software...

      Sent from my SPH-D710 using Tapatalk 2
      Yep
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    25. 05-23-2012 07:40 PM #75





      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

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