Question about 2003 Ford Ranger Regular Cab

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Installing chip and want to double check wiring. Need to find IAT/MAF sensor diagram for 2003 Ford Ranger

Need IAT/MAF Sensor diagram for 2003 Ford Ranger. Trying to install SLR performance chip and want to be sure I have correct wiring.

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  • 4 more comments 
  • sfreemen May 29, 2009

    what about gas mileage?

  • yadayada
    yadayada May 11, 2010

    this is not a chip it is garbage and will do nothing to increase your trucks power. leave the factory sensor alone.

  • Anonymous Mar 15, 2014

    iat sensor diagram

  • Anonymous Mar 22, 2014

    were is maf sensor and hoe do you wire it up

  • Anonymous Mar 23, 2014

    I need diagram to identify signal wires for iat, cts, o2 sencors

  • Anonymous Mar 28, 2014

    I need a diagrams installation a slp-24lab chip when do i put it om the moton

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  • Ford Master
  • 3,854 Answers

Save your money, the chip is a ohm resistor at Radio Shack for under $2.00. It splices in to you IAT wire harness located at the intake tube between the air filter housing and throttle body.
Problem with this system is, that you can not adjust anything and have to run a constant 91 octane just to make sure you do not have a Detonation. The ECM will catch the Detonation from the knock sensor and compensate for it by retarding the timing which in turn lose of HP till next start up.
If you like and don't mind the check engine light on once and awhile, you can do the same by just disconnecting the IAT wire harness which give the ECM a 0 resistance thinking it's -20 out side and turn the timing up and lengths the injector pules.
When i was running a Nitro in the Toy before i sold it, i had installed a 10K ohm Potentiometer which you can buy at radio shack for under $5.00 i believe, I just spliced it in to the IAC wire harness so if i wanted to play with the Nitro I'ld turn the resistor up making the engine think it's 185 degrees F and would ****** the timing so i would not hurt the engine. But if i wanted to get more timing i would just turn the knob to drop the resistance to get more time since the engine thinks it's -20 out side.
Hope this helps. Keep me posted if you need more info. Best thing is to do a dyno tune and you can change everything right down to the Shift points.

Posted on May 29, 2009

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Posted on Jan 02, 2017

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