Just out of winter storage lag

Discussion in '2005+ Mustang GT 4.6L Tech' started by RLF9409, Mar 18, 2020.

  1. RLF9409

    RLF9409 My blood runs Ford blue!

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    Just pulled my car out of winter storage and after taking it easy for a bit decided to do some pulls. It does great from a standstill powershifting all the way to 5th gear. 11.7 on the afr.
    However if I try a 3rd or 4th gear pull it bogs down for a sec and then goes. Afr goes lean. It is fine if I ease into the throttle.
    Could this be bad gas?
    2006 Saleen supercharged forged and stroked 4.6l, gt500 fuel pump tuned by lito

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  2. Dino Dino Bambino

    Dino Dino Bambino I have a red car

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    It could be tune related so I suggest you contact Lito and describe the problem to him.
     
  3. Silver'nStripes

    Silver'nStripes Member

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    Perhaps the computer forgot some of it's 'learned' tuning from sitting for so long? I've had similar intermittent behavior after flashing a different tune.

    2 or 3 more drive cycles might clear it up.

    Gas could definitely be a little funky too.
     
  4. eighty6gt

    eighty6gt forum member

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    Cold weather moving the tune into maps not seen prior

    take a log, send to lito


    Is lito still alive?
     
  5. RLF9409

    RLF9409 My blood runs Ford blue!

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    I figured it out. Not sure how but one of the fpdm in the truck connections wasn't tight. Jiggled it a bit and fixed it. I put some zip ties around it to keep it tight. It is the extra module not the stock one.


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  6. Macman45

    Macman45 Resident Geriatric

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    I’ve had this same issue. And it wasn’t tune / Lito couldn’t find it. Which connector was it? On the rail or on the pump?
     
  7. RLF9409

    RLF9409 My blood runs Ford blue!

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    Actually the module in the trunk. I even remounted the bracket because it was a little loose too. Funny because when I hammer it from a standstill it was fine but if I downshifted is when I had problems. All good for now!

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  8. Badd GT

    Badd GT forum member

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    Couple 2 years ago had to tow my car home because it “ran out of gas” with more than half a tank. When it got home it started right up ? Wtf? Couple days later it did it again except it didn’t start after towing it home. It turned out to be loose connection at fpdm. Good thing for AAA free tows!
     
  9. Macman45

    Macman45 Resident Geriatric

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    I have the exact same issue. Taking off from the light, no problems. Easing into it on the freeway, fine. But if I have cruise set and down shift for a punch and hit it, it falls on its ass, fuel pressure drops and it bogs for 1-2 seconds. I'll check that module ASAP. Was it just the connection? Module itself was fine?
     
  10. RLF9409

    RLF9409 My blood runs Ford blue!

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    Yeah just a little loose connection. I hooked up my sct and monitored the fuel pump duty cycle. Started at .5 and then I jiggled it and watched it go to .18.

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