£5 in Maplin and Seat Ibiza goes like stink!!!

Discussion in 'General Discussion' started by 230K, Dec 13, 2008.

  1. 230K

    230K Hardcore MB Enthusiast

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    Hi

    I was in the nephews Seat Ibiza 90 bhp tdi the other day and he said watch this, he flicked a little switch on the dash and booted it:eek: :eek: The car went like stink.
    So what had he done?????
    He had put some sort of variable resistor on the fuel temperature sensor and can fool it into giving more fuel. He keeps the resistor in the glove box and had to turn it to get the optimum too much and she is smoky. So when he needs an extra boost for passing or whatever he just flicks the switch and whoooosh.

    So how do i fit this £5 chip to my turbodiesel?????
    :D :D :D

    230K
     
  2. kwakdonut

    kwakdonut Hardcore MB Enthusiast

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    Don't if you want your fuel system to explode!

    It fools the car into thinking that the air temperature is lower than it is and in consequence puts more fuel in. I had one of these on my Bora and it worked lovely but plays havoc with you dash computer!!!
     
  3. Dieselman

    Dieselman Banned

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    ?????????? :confused:
     
  4. A210AMG

    A210AMG MB Club Veteran

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    Seriously how much 'extra' on a 90bhp car does it give?

    I had a Power box fitted to a TD4 Freelander and that was supposed to give around 30bhp / 60lbs ft didn't make it much quicker but a LOT smoother to drive.
     
  5. robert.saunders

    robert.saunders Hardcore MB Enthusiast

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    verb: burst outward, usually with noise ("The champagne bottle exploded")
    verb: be unleashed; burst forth with violence or noise ("His anger exploded")
    verb: cause to explode ("We exploded the nuclear bomb")
    verb: show (a theory or claim) to be baseless, or refute and make obsolete
    verb: show a violent emotional reaction ("The boss exploded when he heard of the resignation of the secretary")
     
  6. Dieselman

    Dieselman Banned

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    Your car doesn't inject more fuel when the fuel temperature is cold, but it does allow a higher maximum fuelling.

    The fuel temp sensor is built into the stop solenoid, so you could try that. It connects between pin 4 (Gnd) and pin 3 on the main ECU connector.

    Hmm..:rolleyes:
     
  7. stats007

    stats007 MB Club Veteran

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    Just type ebay , resistor and fool into Google...
     
  8. OP
    OP
    230K

    230K Hardcore MB Enthusiast

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    I can vouch for the fact that it works!! He can't flick the switch in either 1st or 2nd gear it just looses traction if he does. It was a £700 car he bought as a runaround so he is not too bothered about any potential damage.

    230k
     
  9. Dieselman

    Dieselman Banned

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    As long as he isn't exceding the maximum allowable EGT then it won't cause damage.

    I think Stats is thinking of people modifying petrol engined cars, as opposed to diesels.

    If the resistor is left active all the time it will cause the engine to hunt at low revs due to over-fuelling.
    This is exactly what some tuning boxes used to do.
     
  10. stats007

    stats007 MB Club Veteran

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    Maybe he needs a new MAF sensor.
     
  11. evdok

    evdok Hardcore MB Enthusiast

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    I bet you had loads more grunt though!
     
  12. OP
    OP
    230K

    230K Hardcore MB Enthusiast

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    If he turns the dial on the resistor too high it hunts at tickover, he has scraped a line on the box for what he regards as the optimum setting.
    Have you tried anything like this dieselman?

    230k
     
  13. Dieselman

    Dieselman Banned

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    Not quite. As a test I connected a pot into the MAf feedback and used the 5v supply to bias it.
    This did increase fuelling at midrange without any ability to increase maximum fuelling but due to monitoring the EGR it caused a fault code so I took it off again.


    All you need to know is which way the temp sensor works, I suspect resistance rises inversely to temperature, so adding extra resistance into the signal wire will make the ECU believe the fuel is cooler so add more fuel.
     
  14. OP
    OP
    230K

    230K Hardcore MB Enthusiast

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    Hi

    Ypu could always try it and let us know how you get on.:D :D :D

    230k
     
  15. Dieselman

    Dieselman Banned

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    How did I guess you were going to say that...

    Your nephew should fit an EGT gauge to check the temps and as a reference.
     
  16. miro

    miro Hardcore MB Enthusiast

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    Judging by the nature of the mod perhaps just a pringles lide with a bit of the pringles tube cut at an angle with the readings drawn on in permanent marker.
     

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