ok so my car was running very nicely revving and everything i just went out to start her up and now when you start it wont keep going unless you hold the pedal flat and it wont rev and when you hold the pedal down full throttle it only sounds like it is idling it is also now blowing black smoke..... what could this be? please someone tell me what is worng with my car....

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1964 smooth roof panel van
1967 Mk 1 X-Police cooper s
1970 mini k
1975 leyland

How's the oil pressure?

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Cooper S Mk2
Cooper S Mk1
ex Cooper S Mk2, various Morris 1100s, 1300s, 1500s, Leyland Sherpa!

hey this is his brother (younger) his gauge reads low when idling but when rev goes up so nothing wrong with oil pressure what else could it be ??????????

black smoke is fuel - so you either are too rich or you have blocked air filter/inlet

how do u unblock the air filter inlet thingy and bro wants to no what it is

To check the air filter just take it out and see if the car runs better.

Did the problem happen suddenly? If it did then i would suspect a stuck needle valve in the carby float bowl, that would pour in fuel as fast as the pump works.

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Dean Hutton's first car was a Mini.

The choke could be stuck on

the piston in the carby could be dirty & stuck

stuck "Needle & seat" (float valve)

the air filter could be blocked but i highly doubt that because that sort of thing happens very progressivley & not usually all of a sudden

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

nothing wrong with air filter it is a farily new air filter....choke is off...happened all of a sudden ill have a look at the car tomorrow. and let yas know how i go thanks for all ya help guys.

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1964 smooth roof panel van
1967 Mk 1 X-Police cooper s
1970 mini k
1975 leyland

ok. so i have had a look at my carby and have identified the problem the problem is the piston is stuck the one where you put your hand down the throat of the carby and lift up the piston thingy. you cant lift it up. hope that makes sense. what do i do to fix this problem? brand new needle so thats not bent

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1964 smooth roof panel van
1967 Mk 1 X-Police cooper s
1970 mini k
1975 leyland

How about buy a workshop manual

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Your silliness has been noted.

You would want to hope you can lift the piston up, thats part of the design. And the float is in the fuel bowl.

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http://www.youtube.com/user/Hanras

the piston is too hard to lift up......what do i do to rectify this problem? my workshot manual trouble shooting does not say anything about it....

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1964 smooth roof panel van
1967 Mk 1 X-Police cooper s
1970 mini k
1975 leyland

So i guess that means you have oil in the dash pot then.

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http://www.youtube.com/user/Hanras

yes oil in dashpot.......

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1964 smooth roof panel van
1967 Mk 1 X-Police cooper s
1970 mini k
1975 leyland

1st- Disclaimer, I am NO expert on SU Carbies! However after recent experiences have been able to pull them apart in my sleep

If you have NO movement in the piston (as you say), unscrew the damper from the top of the dashpot bell (Usually black plastic shaped thingo). Unscrew the three screws that are around the outside of the bell. Lift the bell gently upwards which should separate from the piston however in your case as it is stuck, the piston may come off within the bell. It may be since you have recently replaced the needle that the needle is not seated properly and this is causing your piston to stick. If you can separate the bell and piston clean and remove any crud between the two.

Be gentle with the piston and bell as the relationship between the two is very important. My understanding is they cannot be mixed with other SU carbies as one part "matches" to the other and as time goes on they wear together.

You may need to look fir another carb or buy a SU book to solve your problem. Hope this helps,

Scott

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Your silliness has been noted.