Morris Minor Owners Club

advice needed my sons 1098 moggy has stopped running properley cannot achive ticover speed without staling .engine speed picks up on its own . revs very fast then dies i have changed the carb and distributer off my own standerd van which work perfect on mine but not on my sons i have cheacked manifold nuts are tight any clues cheers dave

Sounds to me like the fuel supply in view of the swaps you've made. As the fuel runs out the mixture leans and the engine revs before dying.

You need to check the fuel pump operation and for blockages between the tank and pump.

I'd swap the pump for a known good one and start off with it feeding from a can of fresh petrol [usual safety warnings].

If this is OK then connect up the feed from the tank and see if you are still in business.

It's not fuel starvation by any chance? (the symptoms are: engine revs faster then dies). What is the fuel pump doing? Or is it possibly an air leak somewhere in the fuel line?

If the pump and its connections seem OK dont forget to check the pipe to the carb as these can develop splits at the ends with age. Have you tried it with the pipe removed at the carb to check that the fuel delivery is OK, dont forget to put the end in a container..

Thanks for comments so far - I have spent two days (with a mate too) checking everything to do with the fuel supply. I have just done a compression check and compression has risen by 10% on two cylinders when I added a spoonful of oil down the plug holes. All 4 cylinders are different compression readings. I think the rings have gone?
Cheers
Dave

What, all of them! 10% difference isn't that bad. What are the actual
pressures on all four cylinders?

I really wouldn't worry about your rings at the moment. They are not connected with the symtoms you are describing.

It really is pointing to fuel starvation. You say that you have tried everything with the fuel system but does that include fresh fuel in a container feeding the carb via a good pump with good electrical connections?

"If the pump and its connections seem OK dont forget to check the pipe to the carb as these can develop splits at the ends with age."

Yes, they certainly can!
Just changed a head gasket (had to buy a head kit last time - no choice! gasket couldn't be seen and was a white "metal" one. Lasted a few years and took about the same time to scrape off the block). Copper is best.".
Anyway, started engine to check for leaks etc, went fine and then faltered and stopped with a strong petrol smell. Looked inside bonnet and saw a fountain of petrol from the inlet to the carb fuel reservoir. Luckily (well maybe) I hadn't turned ignition off so the fault was obvious. So, I just hadn't noticed the split during weekly fluid checks. Needless to say I will make sure I look through the right part of the varifocals in future. Could be hard to find in the dark with the ingnition off!

Could be hard to find in the dark with the ingnition off!

Unless you are a smoker..................

A few years ago I went to help a girl in Hemel Hempsted who was trying to get her moggie running and moved out of the council garage it had been stored in for some years. Needless to say the brakes were seized and the battery was dead.

I put my moggie nose to nose with it and connected the jump leads. The starter turned over quite happily but there was no noise from the pump. I got out of the car and carefully adjusted the pump (err.. whacked it with my starting handle). All of a sudden the pump started and a fine mist of fuel sprayed out from the pump end of the braided hose. Cue several seconds of sheer panic until I managed to switch the ignition off!

The moral of this story is: 1) Don't try to start a car like this in the dark & 2) Work out your escape route!

Good advice Chris, especially as you seem to like spraying fluids about.......

Remind me not to stand next to him!!!

A few years ago I went to help a girl in Hemel Hempsted

You know.... for a minute I thought you were talking about me, many years ago! (You're not, or if you are, I don't remember that specific incident).

(You're not, or if you are, I don't remember that specific incident).

Kate if you had met Chris you would not have forgotten, as he is a rather shy and quiet sort of person

Good advice Chris, especially as you seem to like spraying fluids about.....

I'll have to overcome my natural shyness Kevin and point out that I've still got full muscle control & my fluids don't leak out. You're probably confusing me with your 'slack' contemporaries at the North Watford pensioner's association...

Kate wrote:

You know.... for a minute I thought you were talking about me, many years ago! (You're not, or if you are, I don't remember that specific incident).

I'm sure you would have remembered me Kate! If it was you then I'm afraid you've being telling us all a load of lies. The young lady in question was transporting her moggie to Pop's Place in Norfolk for work to pass an MOT (her parents lived in Norwich) and she turned up in a smart Audi A5 thingie. Plus she wasn't exactly a dead ringer for you...

my fluids don't leak out.

I reckon that the people at Gaydon would disagree with you there....;-)

You're probably confusing me with your 'slack' contemporaries at the North Watford pensioner's association...

I didnt know there was such a place, but I will conceed to your insider knowledge

andypocock wrote:

start off with it feeding from a can of fresh petrol [usual safety warnings].

How do I do the above ???
Thanks
Brian.. ( beginner )

Buy petrol - pour into carb. Simples!