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Thread: truck wont run right help needed please

  1. #1
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    truck wont run right help needed please

    I installed OBX longtubes and Magnaflow catback, 8# lower pulley , egr deleted, valont cold air intake, 2400 maf ,SCTx3 tuner and got some mail order tunes also installed tr6 1step colder plugs gaped at .032 starts n idles fine but when step on gas slowly accelerate in park it sounds ok till about 2500rpm and when u just try to rev it quick seems like it wants to stall out then idles fine. Also on another note the overdrive button flashes it never has b4
    Help please!

  2. #2
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    Hope you get it worked out bud, lots of knowledgeble folks on here,to help you out. Good Luck.

  3. #3
    Former Owner of 03 #8186
    Name: Adam

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    Re: truck wont run right help needed please

    sounds silly but make sure your MAF sensor is plugged up and turned the correct way. Does the truck throw any CEL codes?

    2003 Black #08186

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    P1229 P0740 P0743 P0755 P0758 P1747 P1754 P1760 P0443 P1451 P0135 P0155
    That's codes it threw and the maf is correct and I just cleaned the plug incase

  5. #5
    Former Owner of 03 #8186
    Name: Adam

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    Re: truck wont run right help needed please

    Wow, with that many codes something is probably unplugged or the tune isn't right. Check all your fuses labeled "engine controls" also. Check www.obd-codes.com and post the description of each code to see if they have something in common.

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    It's gotta b something simple

  7. #7
    needs more cowbell!
    Name: Sheridan

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    Sounds like it went into 'limp' mode.

    Did you make sure your electrical harnesses/connectors are FAR away for your new headers and exhaust?
    Yes officer... I am aware of how fast I was going!

  8. #8
    ResFirma Mitescere Nescit
    Name: stew

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    with this many codes "P1229 P0740 P0743 P0755 P0758 P1747 P1754 P1760 P0443 P1451 P0135 P0155"

    you have an issue with the 02 extensions/02 sensor wires....something isnt plgged up correctly or the wires have been chaffed and are grounding out somewhere between the main harness, 02 extensions and 02 sensors.

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    Ill go over them again but all were ziptied away from exhaust and ploughed back in things throwing me for a loop

  10. #10
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    Just looked them all over and they all are fine how could I check to c if one is bad

  11. #11
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    Name: Chuck NHTOC #291

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    Swap them out with someone else and see if the codes follow over to theirs and their O2's fix yours?

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    Not a bad idea. I'll give it a try do u think all 4 are needed or have my tune guy delete the back two so it's less to worry about?

  13. #13
    *SOLD - but not forgotten
    Name: Chuck NHTOC #291

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    My rears are still in place as I have stock exhaust but they are turned off in my tune. No codes yet.

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    Hmm KKK thinking it's lean

  15. #15
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    Just got fuel pressure gauge on fuel rail @35 with key on not running. Started it @ idle 30 . @about 4000rpm it hit 52 with a quick jab to the throttle. Truck idles fine on stock tune and accelerates fine, I rev it or go full throttle it sounds it hits a 2 stepn or loading up any ideas . Thinking the limp mode thing but dunno y it would do that it threw some codes so I'm Gunna look at those n go from there

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