I got towed :(

MightyBoy tech questions and answers.
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killermule
Posts: 96
Joined: Thu Jun 21, 2012 11:53 am

So.... last night i was just cruising along a main road, then the car went all weird and seemed like it was jolting between 2 and 3 cynlinders. ran like that for a minute then went fine. started again after 5 minutes and lost even more power and more awkward jolting. car made it into a side road then died.

called RAA and the dude spent around 30 minutes tinkering with heaps of little bits a pieces and came to the conclusion there was a blockage in the carby and it was gonna get towed.

Bloody hilarious seeing it on the back of a tow truck...

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Called lube mobile this morning (they specifically listed being good at carbys so I figured why not..). The dude rocked up, started car, took filter off and had a look in the carby. Tapped a bit off to the side of it, sytarted car again and it ran beautifully lol. He had a play with a few other things just to clean the car up a bit (needed some hose clamps in some places). All up, $150 to fix (was expecting a full rebuild of it haha) so not to bad.... for a tap. But as some saying i heard ages ago goes, $10 for the tap, $140 for knowing where to tap. Oh and he told me the carby is only runing primary circuit as the secondary diaphram is stuffed, always wondered how you buggas get to 140+ and im stuck at 110 :(
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gadj
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Location: Maleny, Queensland
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http://www.advancediaphragmoptions.com They're Mikuni specialists & very good at what they do. Or I think there is something in the guides on how to manualise the secondary.
So many delays to getting my MB back in order with 993cc & 5 speed transaxle... neighbor issue gone, donor shell up on rotisserie, new sheds on the way.... another project also..
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ToranaGuy
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It does look a bit funny on the truck, however, I bet mine looked funnier getting towed down the hume hwy by another mighty boy!

In regards tot he 2ndard on the carby, as suggested it can be converted to mechanical secondary, or you could source another diaphragm to fix it.

Cheers

ToranaGuy
It's update time MB Parts list! send part info to toranaguy74@optusnet.com.au|
killermule
Posts: 96
Joined: Thu Jun 21, 2012 11:53 am

well it stuffed up again :( waaaaaaa

getting a webber 30dic from a melbourne guy someone else used here, just gotta find someone to mod it cheaper than $110+/hr service places charge! GAH. but even then gonna be carless all weekend again.
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djflex
Posts: 166
Joined: Tue Oct 18, 2005 6:45 pm
Location: Gold Coast

Whoa Dude - STOP READ THIS

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What youre describing is almost exactly the same thing that fooled the professionals on my little white boy too.


Before you start replacing parts and spending 100s like I did trust me on this one.

In bried I had the same symptoms and NO ONE could solve it even 2 x sparkies replace everything and it still re-occured.

It happened with my old carby and it happened with my new 30 DIC as well .... then it disappeared for a while.... bang it came back on the very day of the gold coast hinterland crusie.


I went on a business trip recently and my neighbour asked for the keys and decided to tinker with it.

What he discovered was so simple but eluded everyone.

He attached a ground wire from the battery (-) to the screw on the condensor (behind the distributor) and BINGO solved

Now my earth wire to the engine is perfect and have replace every part including the dizzy and nothing solved it but that simple wire worked perfect!!!!

give it a try it will take only 5 mins and if its the same issue i had you will have saved 100s or in my case $640.

Everyone was conviced it was the old carby until i put the new one in and it suddenly returned.

please let me know how you go
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killermule
Posts: 96
Joined: Thu Jun 21, 2012 11:53 am

yeh i will definitely have a try of this...

I was planning to upgrade carby and the guy has said this one is stuffed anyway but I will take a look and see if I can do this on the weekend and see how it goes.

re: the ground wire. is that the actual cars ground wire or do I just get a bit of wire and attach it?

also, what does that actually achieve? like is it something condensor related? or was it unexplainable for you? and doesnt that put an extra charge to the condensor since its coming from the battery?
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ToranaGuy
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I've had trouble with my engine ground in the past, mighty boy's usually ground thru the rocker cover to the top of the rad support. It's not a very good ground. With a poor ground the ignition system doesn't function properly.

Cheers

ToranaGuy
It's update time MB Parts list! send part info to toranaguy74@optusnet.com.au|
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Brayden
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Location: Canberra ACT
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ToranaGuy wrote: mighty boy's usually ground thru the rocker cover to the top of the rad support. It's not a very good ground.
The engine should also have an 8 gauge factory grounding wire from the gearbox to the shell via the battery.
F8B EFI turbo - Three pots and a snail.
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ToranaGuy
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Brayden wrote:
ToranaGuy wrote: mighty boy's usually ground thru the rocker cover to the top of the rad support. It's not a very good ground.
The engine should also have an 8 gauge factory grounding wire from the gearbox to the shell via the battery.
That they should, but I'm yet to see one that is missing lol. It's always a possibility tho. It grounds on the inner guard near the headlight and runs to the battery terminal, where a 2nd run starts at the terminal & runs down to the gearbox bolt.

Cheers

ToranaGuy
It's update time MB Parts list! send part info to toranaguy74@optusnet.com.au|
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