fiting a weber ( a rough guide )

Carbs; K-jet; Tanks; Lines; Filler necks, Senders; aftermarket fuel systems; Exhausts and Manifolds;air filters - standard and aftermarket
Forum rules
Hints, tips and guides for repair and modification - the FAQ section on the main website is worth checking first for information relating to common faults and technical help. Useful posts and guides will be added to the FAQ http://www.sciroccoregister.co.uk/scirocco-faq
jskinner97
Posts: 14
Joined: Sat Jul 04, 2020 8:36 pm
fill in the right answer: 15
Location: Great Yarmouth

Re: fiting a weber ( a rough guide )

Post by jskinner97 »

OK, So pictures don't look like they'll ever surface. This video is excellent. The subtitles make it very easy to understand for english. https://www.youtube.com/watch?v=sL7Nk8LiG2A


chris29891
Posts: 7
Joined: Sun Nov 12, 2017 3:27 pm
fill in the right answer: 15

Re: fiting a weber ( a rough guide )

Post by chris29891 »

I’ve recently done this conversion and did the steps above albeit with the instructions that came with the carb but I can’t get it running right and cannot figure out what’s going on! Any help appreciated.

When driving normally, it accelerates as you’d expect. if I put my foot down I can feel the second throttle flap open up because the car stops accelerating, like the mixture is wrong, then lift my foot off a bit and it picks up again when the 2nd throttle closes.

I’ve had it off and on again, checked for leaks on the flange, checked ignition advance, the fuel tank for crap, fuel flow, all seemed ok, also checked there’s fuel going down the second throttle and there is when it’s open.

Any ideas what else could cause this?


User avatar
james butler
Posts: 2978
Joined: Fri Apr 24, 2009 1:54 pm
fill in the right answer: 10
Location: birmingham

Re: fiting a weber ( a rough guide )

Post by james butler »

BIG AIR LEAKS
check the vac lines especially for timing are connected to the vacuum points on the manifold
if you pump the throttle a few times does the problem go away? if so could be a fuel pressure issue ie not enough getting to the carb and the reason a lot of people restrict the return pipe more when running a weber on the old mechanical fuel pump


I dont mind project cars but I HATE SANDING!!!