mk1 cabrio carb problem

Hi, i have an 87mk1 cabrio and need help with the fuel issue. Needs a choke to start up from cold, on take off it feels like plenty of power but when i seem to press the accelerator the power just dies( does not switch off), feels like fuel starvation, when i release the pedal to the top it feels like it want to pull but when i press again it starts to well feels like a fine miss. This only happens when driving, if i rev the engine on the drive, it  seems fine. Any ideas guys :cry:  :dontknow:

Sounds like timing is out, have you replaced filler neck? have you replaced carb flange nd vacuum pipes, what carb do you have, is it a weber which i think it will be, what is engine size 1.6 or 1.8? what work have you done to the car since you have owned it.
Where are you located?
The more you let us know what you have we can help you further fella
Pete

P.S. if you can post this in BIG BLOCK section i can help better

Look at your fuel filter when running, is there air?

funk-star said

Look at your fuel filter when running, is there air?

Hi, it's a 1.8, i have had it for app 6 months now, just passed its mot.
I cleaned out the pick up filter in the tank under the back seat and checked for rust, i have a new filler neck, but there is no rust in the tank.
I am not sure if its a webber carb, but the garage i took it to said they don't think it's the right carb on the car.
I sprayed some carb cleaner and the problem sill persists, it pulls like a 1.3 and not 1.8. have not changed the flange or vacum pipes but i will now. do you think it will solve it or is this a common problem?
Thanks for the advice
Suren

Air in the fuel filter?? do i need to rev the engine to check this, should the fuel be flowing or freely? not really sure what to look for here

Pop your bonnet, look for the in line fuel filter. Should be near the cam belt cover. Start the car and look for air bubbles in the filter.

If there are then replace all your fuel lines 5.5 or 6mm rubber hose.

If it's still causing issues and air is still in the filter then it's steel fuel pipes.

Or replace the fuel pump and swirl pot.

Had similar issues withmy cab and replaced and fiddled with everything to find the problem being the steel fuel pipes.

You might have a pierburg carb that's stock, or a weber upgrade if your lucky. Is it auto or manual choke?

Where u based? if you have weber, on top of air filter box you will have a washer and n hex head bolt, if original carb, you will have a bracket going over the top of air filter box and a rubber piece that covers the hole to access the co screw on the pierburg carb.
Look for vacuum leaks first in flange and vacuum piping, do you have both pins for vac piping on servo pipe?
Any pics of engine bay?
I have said this on numerous post but only because the systoms and faults occur evetually on the same engines, so if you can elimnate vac leaks then we can look elsewhere, i.e. Fuel vapour separator, blocked jet in carb, carb filthy etc etc
Pete  :wink:

Its a manual choke, i will look into this, i hope it work out, its a great car, will keep posted, thanks for help. Suren

funk-star said

Pop your bonnet, look for the in line fuel filter. Should be near the cam belt cover. Start the car and look for air bubbles in the filter.

If there are then replace all your fuel lines 5.5 or 6mm rubber hose.

If it's still causing issues and air is still in the filter then it's steel fuel pipes.

Or replace the fuel pump and swirl pot.

Had similar issues withmy cab and replaced and fiddled with everything to find the problem being the steel fuel pipes.

You might have a pierburg carb that's stock, or a weber upgrade if your lucky. Is it auto or manual choke?

Its looks like a pierburg carb and i will get some pics of the engine bay, i am going to give all this advice a go and hope it sorts the issue out, I am based in east yorks just out off hull

Peddersgolf said

Where u based? if you have weber, on top of air filter box you will have a washer and n hex head bolt, if original carb, you will have a bracket going over the top of air filter box and a rubber piece that covers the hole to access the co screw on the pierburg carb.
Look for vacuum leaks first in flange and vacuum piping, do you have both pins for vac piping on servo pipe?
Any pics of engine bay?
I have said this on numerous post but only because the systoms and faults occur evetually on the same engines, so if you can elimnate vac leaks then we can look elsewhere, i.e. Fuel vapour separator, blocked jet in carb, carb filthy etc etc
Pete  :wink:

If its a pierburg then i have a proven good carb you could try.

OK sorry guys, but i just removed the carb and gasket and lucky me it's a webber, what is the best way to service this and get it out of the way then maybe look at the pumps and filters?? thanks again for all the advice
Suren

i have a brand new weber carb thats done 2000 miles. not had any probs, just removed due to purchase of a G60 engine.

dont know how much a service kit is for a weber carb but id sell mine on delivered for ?95.

brought off ebay for ?220.

hope you sort it soon, pm me if your interested?!?

K5-PVD said

i have a brand new weber carb thats done 2000 miles. not had any probs, just removed due to purchase of a G60 engine.

dont know how much a service kit is for a weber carb but id sell mine on delivered for ?95.

brought off ebay for ?220.

hope you sort it soon, pm me if your interested?!?

Hi my email is oak7ey@yahoo.co.uk, is the carb for a 1.8 if so might be interested, can you email some pics to me cheers, just need to make sure that is will fit mine thats all, cheers for the mate

yes mate it will fit a 1.8 as thats what mine was…. will try to get some pics to you tonight when i get home.

just a fit and forget item mate.