Hi all i have a prob my bug :'( has decided to play up it starts OK and execrates OK but coffs and spurts like hell when i coast / drive along in any gear i dont no anywhere around here near where i live at brize norton where they can tune my engine ,, it sounds like to much fuel going through the engine ,, i have had a look on line for said garages but to no av ale dose anyone no of anyone who can sort this much thanks rob ;)
Check the choke is off when running but itwill need a full engine tune. No idea on brize Area What engine and carbs ect. I am evesham so a bit of a distancep
As a starter, back to basics. Is the air filter/s clean. May be getting choked :-\
It would be useful to know a bit more about your setup
Single or twin carb ? Inlet rubber Air leaks? Rotor arm and cap ok ? Exhaust leaks?
hi all many thanks for getting back too me .. set up is twin web 35 carbs 1641 engine big boar electric ignition ... air filters are new, just serviced no electric fuel pump tried that didn't work ,, used to back fire if that helps ;-)up
Are you running a regulator between your mechanical fuel pump and the carbs? The mechanical can push out too much pressure and flood them.
yes i have tried with it and with out it makes no difference
the reg is before the fuel pump
Remove your distributor, give mating surfaces a good clean, remove any paint. Refit and test.
I had a very similar problem, the car would start no problem, but once warming would start popping and hissing. Found electronic ignition needs a max' resistance <0.1 ohms. You can measure this between the battery earth terminal and advance plate of the distributor. I found paint was preventing the electronics working properly. Once clean all is good. Incidentally, you can fit points and a condenser. This set up isn't bothered about a decent earth.
Give it a go :-\
Paul
many thanks i have a new dizzy and roter arm new leads and spark plugs ,, battery voltage is spot on ,, i had it on the rolling road last year where it was all sorted but the gi who did this is no longer doing this any more i have had a word with a company in Cambridge it costs me 250 just to get him down here http://cartune.uk/classic-car-tuning
So have I got this right? does it play up under light load, by this I mean at a constant speed in each gear? Or when you take your foot off the throttle?
Rob
constant speed in each gear
If it starts OK and accelerates OK, the problem is blocked idle jets!! Has it been left standing for a while? this causes the carbs to dry out leaving scaly deposits which blocks the idle jets and small passageways.
Rob
yes for a while i will look at the idle jets tomorrow many thanks i will let you no what happens tomorrow ;-)(-;
When you say Weber 35's, are these single choke carb's; unlike the twin choke Weber IDF's or Dellorto DRLA's? Sometimes just cleaning the idle jets works but most of the time, you have to clean the whole carburettor, blowing out all the passageways! ;-)up
Rob
yes single i have just been out and taken the idle jets off and they look very clean but i did clean them anyway i really do think its the settings on the carbs but i dont no how to set them up not a clue ::)
Quote from: evans794 on April 16, 2019, 06:13:21 PM
the reg is before the fuel pump
Regulator should be after the pump not before as you are controlling the pressure into the carbs, not restricting the flow into the pump
I believe it should be 1.5 - 2.5 PSI
will refit tomorrow and see many thanks :)
Regulator sorted , took the fuel reg off all is back to norm (default) did timing still the same, did plugs still the same, checked ht leads and coil, tried to do the rich settings but still no ider why this is still doing the same thing jerking at constant speed in each gear going to give up soon driving me mad
needs an engine tune up and carbs resetting from scratch. I am 30 odd miles away and prefer cars here as going mobile I often need stuff that I left at home or could not carry,
basic carb setting is on linkage off to separate them.
idle speed screws out clear of the stop plate then in until they touch + 1/4 turn
mixture screws fully in gently till they stop then out 1.75 turns
then it should start and run
if too slow both speed screws in another 1/4 turn
at this it should be drive ok but need fine tuning on mixture and speed
Quote from: snoopy on April 17, 2019, 10:57:52 PM
I am 30 odd miles away and prefer cars here
@Rob,
Let me translate that for you . . .
Find a way to drive 30 miles and get it to Snoopy, because he
WILL fix it ;-)up
Or buy a book ??? ???
i will try and get up there in my next 4 off i work shift so next off will be Tues to Friday next week if you send me a phone number i will ring and arrange .. email - robertevans794@btinternet.com many thanks life saver ;-)(-; or further down the line
i ve found your number i will ring you in my next 4 off many thanks