vinny1275
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| posted on 25/10/09 at 01:08 PM |
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Throttle bodies popping off?
Hi all,
Just out trying to get the Pinto running a bit better with the megasquirt, and trying to get it to start from hot (which it's now just about
doing..) - the engine was idling (quick, about 13 - 1400 rpm), and all of a sudden, the whole throttle body assembly (including the airbox) popped off
the inlet manifold...
Anyone any ideas what could have caused it? I can only presume that it pressurised somehow, but how?
Cheers
Vince
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austin man
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| posted on 25/10/09 at 01:23 PM |
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Is there a groove machined into the inlet tract ? if not this could be the problem, the pipes connecting the two usually seats in the groove when
clamped up.
Hope that makes sense
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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vinny1275
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| posted on 25/10/09 at 01:26 PM |
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I know what you mean, but the rubbers stayed on the manifold, not the throttle bodies. There is a groove on those, it may not have been quite tight
enough. I've done them up again and I'll see how it goes....
Ta
Vince
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brianthemagical
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| posted on 25/10/09 at 01:32 PM |
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does any part of the TB/airbox assembley hit anything? Other than that it could be too much weight/mass and the engine movement is just causing them
to come off.
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rusty nuts
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| posted on 25/10/09 at 01:51 PM |
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Fit a couple of bracing straps between the airbox and the manifold/head. Seems to be a fairly common problem especially if using silicon hose as
mounting rubbers.
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mark chandler
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| posted on 25/10/09 at 03:33 PM |
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I have a tie bar on my TB's just picked up on the top centre and across to the cam cover, these things will rattle loose.
Regards Mark
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RichardK
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| posted on 25/10/09 at 05:02 PM |
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Have you used normal silicon hoses? imo these aren't stiff enough and as the vacuum pulses it in effect squeezes the hose until they come off.
So if you must use hose then I would have the minimum amount of hose between the inlet manifold and throttle bodies if that makes sense. I would also
brace the throttle bodies like I've done on my carbs just recently like below.
I managed to get the inlet rubbers that came off the bike and these are really stiff.
All in my opinion of course.
Cheers
Rich
Gallery updated 11/01/2011
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vinny1275
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| posted on 26/10/09 at 09:17 AM |
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Thanks Rich - I'm using bike rubbers, which are nice and stiff - will look at bracing them up in that case...
Cheers
Vince
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macc man
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| posted on 17/1/10 at 09:51 PM |
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bike carbs loose
Hi, thanks for all the replys, I think the original bike rubbers and a couple of metal braces may be the best solution.Many thanks.
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Jenko
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| posted on 18/1/10 at 11:06 AM |
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An age old problem :-)
I made up a couple of brackets to keep mine on....
MY BLOG - http://westfieldv8.blogspot.co.uk/
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