setting up a weber carb for 1.8

hi people has anyone got any ideas how i set up my weber and want to set the idle up as it's idling at 1300 i have recently cured a couple of air leaks so i would emagine the cars running rich can anyone help as shes costing a lot in fuel and want to put it right :cry:

their's a little flat head'd screw on the side in a little recess which will sort that matey

pete

yeah found that pete thanks have you a clue to what the idle shud be and how many turns to screw the flat head in?ill have a play at work tomorow as i have a co machine   thanks mate

depends on the car as to how far the screw should be turned in. should tick over at arond 800-850 from electronic ignition and 900-1000 from contact ignition.

as for setting up the mixture. turn the mixture screw in till the car is just hunting the out till it stops. then set your idle speed.

thanks not sure what ignition mine is when you say hunting not horses and hounds?is that when the revs drop and then increase i had a go tonight at setting it up but think i still have a air leak or another problem as shes all over the place hc hydrocarbon which is unburnt fuel raises from 120 to over 250 and the co measures from 150 to 450 totally inacurate and hard to set it up almost imposible so going to investigate the problem i have further till ive exhausted every possible sollution feel like banging my head on the bonnet but of coarsei wuldnt do that to a mk1 id use a wall

hunting is when the engine starts to pulse a drop then a rise in revs.
pul the dizzy cap off and have a look under the rotor arm if you have a set of points its non electric or points ignition if you dont you have breakerless ignition. (hint the points are under the white cover) if it's on points these need replacing. change the condenser while your at it. check the oil breather pipe isn't blocked and check your timing. then set the carb up.

Has it got the correct jets & emulsion tubes? I changed mine in the DMTL when I went from 1595cc to 1781cc. Idle and CO always need to be adjusted

a good starting point for jetting up for a standard 1800 motor is

main jets primary:117 secondary:127
air corrector jet: primary:145 secondary:200
emulsion tubes: primary:f30 secondary:f33
idle jets: primary:55 secondary:60
pump jet:45
needle valve:175

hi guys thanks for the quick replys have the correct jets hasnt got points what does the condensor look like?sorry only a traniee mechanic so learning bout these part of the fun sometimes hmm :dontknow: what are the settings you have listed there mate and how will i check them as not got much gear at my work have timed her up when i fitted the cambelt used a strobe thingy will keep eliminating thanks guys :wink:

condensor is the small cylinder attached to the side of the dizzy. to remove it
take the dizzy cap off.
remove the rotor arm (make sure to put it back the same way it should only fit one way)
lift off the dust cover
you may have to remove the bearing plate but that depends on which dizzy you have.

now you can see the points.
on unplug the wire you can see that has a spade conector on it.
undo the screw on the side of the dizzy that holds the condensor on and remove.

easy test is
remove dizzy cap so you can access the points.
stick the car in gear and rock the car till the points are closed (touching)
turn on the ignition and seperate the points with a screwdriver on the lever arm.
if you get a strong blue spark the condensor is dead. a weak spark is perfectly normal.

thanks bud for that will have a look tomorow is the condensor a common fault on these can u clean them or beta to replace them whats it's job ?thanks matey

change it. it reducs arcing between the points. just somethng to change thats cheap.doesn't really seem like a prob with yoours but worth doing it to get it right.

well i have found out have electronic ignition and changed the condensor an timed up using strobeascope wicked tool actually had a laugh when i put the firms fluro jacket on and held that scope on to a car passing amazing how many braked like mad  what i was bored anyways shes still cutting out but only once warm and off the choke runs fine when on the choke alot better anymore suggestions ?cleaned out the carb was gona take the jets out but dont know how has anyone got info and or p[iccys plaese ta really enjoyed today working on her again had to declare sorn so shud get more time now on her

if you look on the bulk head at the right hand side mate youll see a little silver box with a black plug, 7 pins on the box its self change that and she should be fine mate, i was having the same problems. its a transistorised idle stability THING?? about ?30 from german sweedish.

hope that helps.         pete

oooh intresting havent heard bout them before ill investigate sunday when i get 5 mins and the weather aint crap thanks again :wink:

pete have you got any pics of that idle thingy cant seem to see it and gsf dnt know wot im talking bout mate ta :dontknow:

found it mate thanks its held to a plate on mine by 2 phillips screws neways of checking it b4 i fork out 4 new