Search results

  1. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    UPDATE. No more reduced engine power after all the work I did. "Service stability system" message is popping up only. I'm sure I have to maintenance the ABS module but she's rolling!
  2. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    Turns out it wasn't the HVAC. Pretty sure just grounds and the Flasher Relay. Electronic throttle module, brake module, and stoplamps are connected to the Flasher Relay. I installed a bunch of interior LEDs and I think it caused some issues with the stock Flasher Relay. It also had aftermarket...
  3. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    Well, I tested it with the scope with the hvac plugged back in and everything was responding properly with no reduced engine power. I think the fix could have been the grounds I fixed and cleaned, upgraded to a LED flasher relay (do this if you upgraded any lights to LED), and I updated all...
  4. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    FIXED. After unplugging my rear HVAC module. I seem to have gotten rid of the "reduced engine power" message and have full connection to the throttle. I am getting an oscilloscope tomorrow to test by serial bus. Crazy how these modules cause interference like that. I am going to test it like a...
  5. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    Well... all wires have been properly soldered. Grounds are absolutely perfect. Ohm the wires from the TAC module harness to PCM. Nothing is working per usual. Same codes pop up. When checking the inside of the instrument fuse panel, I noticed the fuse pictured does not light up for me when the...
  6. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    @strutaeng Thanks for the reply. I traced every wire to the ending point, fuse box, Tac wire, and i only visually inspected the 4 wires going into the truck. Every wire has an electrical path. I realized my solder job was awful. I will post some updates after correcting. I didnt check the two...
  7. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    Realized my soldering job is terrible. Going to correct and post update
  8. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    New pedal sensor to TAC module harness.... still throwing same codes with no throttle response. Going to check wires for the 9th time and I'm done trying. Found out I'm missing a ambient temp sensor next to condenser so I'm buying another one. Traced one ground that led to two grounds that hook...
  9. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    Nothing has fixed the issue yet. Going to wire my own, pedal sensor to TAC module, harness and see what that does. Tested can bus and the radio had no voltage with makes sense cause no radio is installed. The other test came up faulty was the ABS but maybe no voltage cause it's not on? Idk. Had...
  10. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    @Doubeleive Good news, I was replacing my front passenger fog light pigtail and got lucky and found this ground wire that connects to it almost about to split in two. Im feeling very hopefull that could of been my problem the whole time sheesh.... The plastic protection case showed no signs of...
  11. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    I wonder if thier is an adapter from tech2 to the splice pack?
  12. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    Thanks!
  13. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    Ok awesome, thanks for all the help. It's the splice that controls can. I just have to look up a way to test and should be good to go.
  14. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    I think this may be my CAN BUS? it was taped right on top of the harness. I remember watching a old video on a Silverado and yhey had a slice pak instead of the two pins.
  15. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    Gotchya, im going to do that. Yea It shows alot of modules when I plug it in.
  16. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    No not too my knowledge. Its a 5.3 LM7. When I took it apart it looked pretty dirty and stock. Thanks for letting me know, I felt like I should have those to test it. Not sure what to do now lol thanks again for the help
  17. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    It has four wires that I followed and they just tie into the harness then connect I to the driver side fuse box. I guess I should test continuity? Or keep digging. Seems like it should have more then 4 pins/wires in the OBD port *Red arrow is the 4 wires from the OBD port *Green arrow is the...
  18. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    Also this is what my OBD port looks like. Thought this truck had a CAN network but im not sure. That's the first thing I wanted to test. Based off the port, I can't test it thru there.
  19. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    Just finished checking and I have flow all the way thru to the fuse block. Noticed a little dirt in the fuse box right where the cables connect. Just going to clean it real good and put everything back. If that doesn't change anything I will move on to checking grounds for continuous flow. After...
  20. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    The cable from the pedal sensor to the TAC module has a continuous electrical path. Same for the cable from the TAC module (right side) all the way to the TPS connection. Going to check the other 8 wires coming from that TAC module cable to the fuse box.
  21. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    No just visual inspections. Did some research and am now going to check each wire Individually, ohms, voltage, and whatever else. Thanks for the help, I will keep posting updates. Hopefully I can pin point it!
  22. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    Another update....... all previously crimped wires have been individually soldered. Even moved a back ground thinking it might help lol. LITTERALLY NOTHING HAS CHANGED. guess it's time to take engine out and replace harness? Who knows at this point. Might look for a donor car to put engine in. F...
  23. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    Throttle body is fine. Both throttle bodies are working. Both TAC modules are working. TPS wire pigtail connector has been replaced. Grounds have been cleaned. New battery. Both pedal sensors are working .... I just don't understand this. I have soldered all the wires I orginally crimped...
  24. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    Guess it's time to hit another forum, no one knows anything about this issues
  25. S

    REDUCED ENGINE POWER. Read below and please help me understand this.

    ANOTHER UPDATE. All wires have been soldered, New pcm installed, AND STILL NO RESPONSE TO THROTTLE BODY

Forum statistics

Threads
133,291
Posts
1,882,962
Members
98,351
Latest member
ALLENY66

Latest posts

Top