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Thread: TN Magna flooding

  1. #1

    Join Date
    Feb 2018
    Location
    New South Wales
    Posts
    1

    Default TN Magna flooding

    Hi All,
    I have a TN Magna carby model which floods after you turn it off and it sits for 10-20 minutes. If you push the foot to the floor it also chokes.
    Put a carby kit through it, but a carby guy said it could be a blocked pipe and that it was a back pressure flood.
    Anyone experienced this? Can I change the carby?
    I appreciate any help.
    Regards AndrewH

  2. #2

    Join Date
    Aug 2011
    Location
    Queensland
    Posts
    215

    Default

    Can you replace the carby? YES, you can

    You could replace it [with mods] to a weber 32/36 or a ford unit, see this thread for more info weber carby fun!

    You can also read through this thread to see if it can help you TP 1990 Carby problems

    Alternatively you may be right with a rebuild of your stock carby with a gasket kit but some say this is not worth it due to cost.

    May also not be the carb, so do some reading before taking your next step

  3. #3

    Join Date
    Jul 2013
    Location
    Victoria
    Posts
    5

    Default I also have TN flooding problems

    Hi All Magna Fans/Experts

    I have 1988 tn Magna sedan for 2 years now and couldnt be more happy.until now .

    However recently my carby has been intermitinlty (what ever) has been flooding when I try to start the engine either cold or hot.

    Accordingly I have stuffed the starter motor $250 worth of ignorance now replaced, Im afraid now with early onset dementia Aged 78 this year, galloping along I find the posts regard similar problems to this but wonder if any enlightened souls may offer suggestion apart from using an axe.

    Any mechanics I asked retreat to the toilet and refuse to come out.

    Does any one know a Carby man in the Melbourne area familar with this type of carby,as I do not want to give on the job learning to some person at my expense. Probably ending up more than the cost of the car.

    I notice from some of the previous posts this was a complex design due to stricter emission and the then moved onto FI.

    I can understand why.

    Any advice would be welcome,with grovelling gratitude.

    Many thanks for any help

    Ron

  4. #4

    Join Date
    Aug 2011
    Location
    Queensland
    Posts
    215

    Default

    Personally I would make a decision now before getting any deeper.. should you poor any more money into it when you can get a reliable newer car for around $1,000 these days?

    if you have the ability to diy then perhaps it’s a situation that calls for either;
    1. Rebuild/replacement of stock carby - it could simply be that the parts are worn out or clogged.
    2. Upgrade to something like a weber carby which can be done for $600 (eBay “Magna Weber” and you will find the 2.6lt conversation kit with a weber 32/36)
    3. Find an efi car in your area and swap the motor or just efi parts

    All comes down to how capable you are I wish you luck.

  5. #5

    Join Date
    Jul 2013
    Location
    Victoria
    Posts
    5

    Default

    Many thanks for your reply.
    Im a little bit between a rock and a hard place.
    The car was given to me by a friend in return for my help.
    The car had always been garaged,fully serviced and only had 120000 kms on the clock
    It went through the rwt without a problem.
    The interior motor ect was in as new condition
    So I am reluctant to get rid of it as it will probably last until I do.
    40 or so years ago I would have thought nothing of tackling anything with cars etc but now to remove the whole carby sheesh

    I was talking to another ancient the other day who had one many years ago and cleaned the float needle by only removing the top cover,not the whole carby.

    Do you have any idea whether this is so as I am willing to try this ,or any other member who might have had experience in this.

    Anyway Magna,s still rule hoping you can suggest a solution other than changing it for an unknown quantity

    Many thanks
    Arjay007

  6. #6
    dennystone 12's Avatar
    Join Date
    Mar 2005
    Location
    International Member
    Posts
    303

    Default

    A change to EFI would be a good move.
    westport nz E34 535i & E39 540i

  7. #7

    Join Date
    May 2016
    Location
    Australian Capital Territory
    Posts
    70

    Default

    Hi arjay.
    Sorry to hear about your problems.
    One of my kids had a pre EFI carby Honda.
    The carby looked an absolute nightmare. I'm surprised they could manufacture something so complex and get it to run.
    Luckily I never had to work on it.
    Maybe give Mal @ Mits-fix ( his workshop .... see home page for these forums ). He is in Melb. He may be able to point you to a reputable Carb specialist.
    It 'could' be a simple fix or something more complex and time consuming.
    It really depends how many $$$$ you want to throw at it ?

    Anyway, Good luck.

  8. #8

    Join Date
    May 2016
    Location
    Australian Capital Territory
    Posts
    70

    Default

    Hi arjay.

    Just an afterthought ........
    I don't know your financial situation, but if the car is in excellent condition otherwise, I would seriously consider getting it fixed ( even if it's 5, 6 , $700 ).
    As you said it will probably last as long as you......

    Good Luck

  9. #9

    Join Date
    Aug 2011
    Location
    Queensland
    Posts
    215

    Default

    The pictures donít show on the forum, but you can open the links to the photos to see them on Magna Buffs Photobucket account. The pics show the carby in exploded view and you can determine what you can do without removing it from the engine.

    http://Carbies/ fuel filters /guage info

  10. #10

    Join Date
    Oct 2012
    Location
    Victoria
    Posts
    279

    Default

    I had this problem with the TP carby.
    I believe that with time, the float level rises due to wear in the float valve. Even tho Mitsi say the float level cant be adjusted, careful bending of the float valve plate can be done. I also reckoned that the cannister particles were packed down and caused a restriction in the air flow through it. I opened the cannister and modified the length of the pipe to reduce the potential for pressure rise in the cannister.
    Not sure really how successful this was cos shortly after I bought a TW. The TP was used as a farm car. Sadly it is now running on 3 cylinders and is due to be scrapped. I think it may be spark plugs or leads, but continuity checks on the leads shows them to be OK.

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