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  1. #1
    Non-member Big Supes's Avatar
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    Running Out of Puff

    Currently experiencing an odd issue where, under full throttle, up until I get into 4th gear, everything is fine. A couple of seconds into 4th and it pops with a loss of power. I've only had the balls to keep the throttle open once and it continues to miss badly.

    I've changed the fuel pump - about to change the fuel filter. It's had new spark plugs/dizzy cap & rotator arm/HT leads so will check the plug gap tomorrow.

    Anything I'm missing? Has anyone else experienced anything similar?


    Cheers.

  2. #2
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    Re: Running Out of Puff

    is your tdc sensor ok mate

  3. #3
    Motech Tony Walker's Avatar
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    Re: Running Out of Puff

    sounds like it may be emptying carb float. an afr gauge would prob be best to monitor it with. what psi are you running?

  4. #4
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    Re: Running Out of Puff

    im only running 10psi at the min just sorting my afrs out so i can run 16psi
    but i was poping and cutting out the other day and it was a dodgie tdc sensor wire

  5. #5
    Non-member Big Supes's Avatar
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    Re: Running Out of Puff

    Quote Originally Posted by KEV 5 GT View Post
    is your tdc sensor ok mate
    I couldn't say for sure. It does miss a beat every now 'n then, even on idle.

    Quote Originally Posted by Tony Walker View Post
    sounds like it may be emptying carb float. an afr gauge would prob be best to monitor it with. what psi are you running?
    Fuel starvation is what it feels like. My last 5 did the same thing when it was running very low on fuel. Currently running 16 psi.

    When I have the funds I'll get a afr gauge sorted, but for the time being I was wondering where I could source a probe to go in the bung for the lamba and software to run off my laptop?

  6. #6
    Non-member Big Supes's Avatar
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    Re: Running Out of Puff

    Quote Originally Posted by KEV 5 GT View Post
    im only running 10psi at the min just sorting my afrs out so i can run 16psi
    but i was poping and cutting out the other day and it was a dodgie tdc sensor wire
    Sounds like a suspect! I'll check it out tomorrow. Ta.

  7. #7
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    Re: Running Out of Puff

    ive got an lc1 kit but ur a good run away i dont need softwere on laptop as not needed just sensor and lc1 box does the trick im in need to enlarge the 2nd stage jet but not sure where it is at the min and best way to do it lol...id deffo check you tdc wires out tho seems to be a common fault it seems

  8. #8
    Non-member Big Supes's Avatar
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    Re: Running Out of Puff

    Cool, thanks Kev. I'll defo have a check tomorrow. I posted some info from the articles on your thread.

    I've never looked into a tune/monitoring software or tool so I'll have to dig around to see what is the most suitable option.

  9. #9
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    Re: Running Out of Puff

    yh have a check you never know thanks for the thred just gotta get me head round it lol and get to grips where things are

  10. #10
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    Re: Running Out of Puff

    i had this issue a few years ago.. i needed a new fuel pressure reg

  11. #11
    Non-member Big Supes's Avatar
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    Re: Running Out of Puff

    Quote Originally Posted by KEV 5 GT View Post
    yh have a check you never know thanks for the thred just gotta get me head round it lol and get to grips where things are
    No probs mate. Will have a check when I can be bothered to get out of bed.

    Quote Originally Posted by LeeR5GTT View Post
    i had this issue a few years ago.. i needed a new fuel pressure reg
    Another candidate added to the list. Cheers Lee.

  12. #12
    Non-member gttjames's Avatar
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    Re: Running Out of Puff

    Quote Originally Posted by LeeR5GTT View Post
    i had this issue a few years ago.. i needed a new fuel pressure reg
    did you just fit a new standard fpr or uprated?

  13. #13
    Non-member Big Supes's Avatar
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    Re: Running Out of Puff

    Any thoughts on this little bugger?

    http://www.ebay.co.uk/itm/FUEL-PRESS...item2ec78911d4

  14. #14
    Non-member gardner51's Avatar
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    Re: Running Out of Puff

    I have just orderd mine. Bought from here..

    http://item.mobileweb.ebay.co.uk/vie...w=110985946229

    Elliott

  15. #15
    Non-member gttjames's Avatar
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    Re: Running Out of Puff

    Quote Originally Posted by gardner51 View Post
    I have just orderd mine. Bought from here..

    http://item.mobileweb.ebay.co.uk/vie...w=110985946229

    Elliott
    nice elliott - let us know how you get on

  16. #16
    Non-member Big Supes's Avatar
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    Re: Running Out of Puff

    Quote Originally Posted by gardner51 View Post
    I have just orderd mine. Bought from here..

    http://item.mobileweb.ebay.co.uk/vie...w=110985946229

    Elliott
    Sweet. Will jump on this tomorrow.

  17. #17
    Non-member Benjibrady's Avatar
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    Re: Running Out of Puff

    did you get a result on the new fpr, i have the same problem in 5th. 25 psi of boost, seems fine through all the gears up until fifth at around 80mph and just gives up. Havent kept my foot in it as i dont want to do any damage.

  18. #18
    Non-member GTphil's Avatar
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    Re: Running Out of Puff

    25psi in fifth lol Fifth needs an awful lot of fuel so will defiantly require fuel supply mods at that boost

    you want a high pressure fuel pump, efi/044 etc and either and adjustable fpr or a rising rate one, from the malpasi range.

    If your running a phase 1 pump i have seen even these struggle with that sort of boost

  19. #19
    Non-member Big Supes's Avatar
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    Re: Running Out of Puff

    A big thanks to Elliot (gardner51) for sharing his diagnoses. After PM'ing back and forth, I've replaced the AEI unit and she's good as gold again. Pulls nice and smoothly and doesn't miss a beat now.

    Cheers fella.

  20. #20
    Non-member gardner51's Avatar
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    Re: Running Out of Puff

    Not all down to me mate. Big thanks to marky mark for sorting mine. Top fella!

  21. #21
    Non-member TNT ANDY's Avatar
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    Re: Running Out of Puff

    Wow - Faulty ECU, suppose they can't go on forever. Good find.

  22. #22
    Non-member gardner51's Avatar
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    Re: Running Out of Puff

    Thats 2 gone at the Same time! Oh well least their fixed!

  23. #23
    Non-member Phaseone's Avatar
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    Re: Running Out of Puff

    New poster! (less than 10 posts)

    I've started to experience the same problem I'm currently running 22psi ph1 pump original regulator, I have an afr gauge which appears to shoot up to 22 when it happens but I pretty much lift of straight away cus of all the popping and banging etc. Think I'm gonna fit a fuel pressure gauge and see any one got any suggestions for fuel pumps and regs? as I'm looking to run more boost

  24. #24
    Non-member gardner51's Avatar
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    Re: Running Out of Puff

    I use an efi fuel pump, malpassi fuel reg and I still was getting this problem. Change the aei and runs bang on...


    Elliott

  25. #25
    Non-member Big Supes's Avatar
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    Re: Running Out of Puff

    Quote Originally Posted by TNT ANDY View Post
    Wow - Faulty ECU, suppose they can't go on forever. Good find.
    It seems both ECU's caught a cold.

    Quote Originally Posted by gardner51 View Post
    Thats 2 gone at the Same time! Oh well least their fixed!
    Just in time for Santa Pod Sunday and tomorrow night's Surrey Meet.

  26. #26
    Non-member Markey Mark (BD)'s Avatar
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    Re: Running Out of Puff

    Looks like some AEI units are coming to the end of there life now then, not going to last forever

    Wonder if those rebuild kits the Europeans used are still available as good AEI units will slowly be hard to find

  27. #27
    Non-member Big Supes's Avatar
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    Re: Running Out of Puff

    Quote Originally Posted by Markey Mark (BD) View Post
    Looks like some AEI units are coming to the end of there life now then, not going to last forever

    Wonder if those rebuild kits the Europeans used are still available as good AEI units will slowly be hard to find
    I didn't have the time to try it first, but it's worth mentioning that I noticed the earthing point for the AEI on the arch was a little loose. It could have been this that caused the problem. As my old AEI has the Armtech rev limiter fitting I may try putting it back on to see if it acts up again with the earth tightened up.

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