MG Midget Running problems
Author
Discussion

auxilarygrub8

Original Poster:

33 posts

171 months

Monday 2nd July 2012
quotequote all
I have just brought an 1500 Mg Midget and tried starting it . this is my first classic car and i am a learner so bare with me. The car ran up a couple of times however cut out seconds after run up, so im getting a spark and fuel . but as i say then i have problems keeping it running even with throttle open . could this be the carbs. i just need some freindly advice

HustleRussell

26,484 posts

189 months

Monday 2nd July 2012
quotequote all
What are you doing with the choke? It'll probably need to run with the choke open for a good few minutes before you start closing it off.

auxilarygrub8

Original Poster:

33 posts

171 months

Monday 2nd July 2012
quotequote all
ive tried running with choke open and it cuts out and makes a whining noise. the previos owner put diesel in it by accident . ive flushed it but could this have done more damage

auxilarygrub8

Original Poster:

33 posts

171 months

Monday 2nd July 2012
quotequote all
ive tried running with choke open and it cuts out and makes a whining noise. the previos owner put diesel in it by accident . ive flushed it but could this have done more damage

HustleRussell

26,484 posts

189 months

Monday 2nd July 2012
quotequote all
I wouldn't have thought getting diesel out of the fuel system and carburettors would be too easy. How did you do it? There is a possibility that the tank, lines and carb bowls need emptying, the carbs need a thorough clean and then starting again with fresh fuel. You could also be suffering with an air leak somewhere if you have strange inlet noises. Shame it's a Monday as it sounds like you might have a Sunday morn's work planned!

HustleRussell

26,484 posts

189 months

Monday 2nd July 2012
quotequote all
Oops double post!

May as well add that my inkling is that you have a carb/fuelling problem so it's help if you could describe what else has been going on i.e. what have you already tried.

Edited by HustleRussell on Monday 2nd July 19:52

auxilarygrub8

Original Poster:

33 posts

171 months

Monday 2nd July 2012
quotequote all
I flushed the tank and all the hoses through with fresh petrol . the carbs however i havn't touched yet . so ill strip them down clean and pray for the best over the weekend . fingers crossed

Spitfire2

1,968 posts

215 months

Monday 2nd July 2012
quotequote all
Wonder if it has a ballast resistor like the Spitfire. Presume so as you have a Spitfire engine.

Maybe firing OK with the 12 volts when cranking but not when the voltage reduces to 6 volts when off the key.



auxilarygrub8

Original Poster:

33 posts

171 months

Monday 2nd July 2012
quotequote all
ive flused the fuel system . i havnt touched the crabs as bit scared to lol . ive tried starting with choke full, half, not on at all . tried throttling engine when engine run up . nothing seems to be keeping it running though . this is all i have tried with my novice knowledge

SV8Predator

2,102 posts

194 months

Monday 2nd July 2012
quotequote all
auxilarygrub8 said:
i havnt touched the crabs as bit scared to lol
Don't be scared, give 'em a good old scratch.


Edited by SV8Predator on Friday 6th July 21:15

Dogwatch

6,381 posts

251 months

Monday 2nd July 2012
quotequote all
Is the fuel pump working? I doubt if the misfuelling will have done it any damage but AC fuel pumps have their own failure rate familiar to anyone who has owned a BMC sired car frown

Usual test is to extinguish fag, disconnect rubber fuel line into the carb(s), place open end in old rag and get a helper to switch on the ignition for a few secs until fuel flows (or doesn't). If it does - fine. If not, sigh, and open Haynes manual at the page on replacing the electric fule (typo but I'll let it stand) pump.

It's a well worn path.

auxilarygrub8

Original Poster:

33 posts

171 months

Monday 2nd July 2012
quotequote all
Dogwatch said:
Is the fuel pump working? I doubt if the misfuelling will have done it any damage but AC fuel pumps have their own failure rate familiar to anyone who has owned a BMC sired car frown

Usual test is to extinguish fag, disconnect rubber fuel line into the carb(s), place open end in old rag and get a helper to switch on the ignition for a few secs until fuel flows (or doesn't). If it does - fine. If not, sigh, and open Haynes manual at the page on replacing the electric fule (typo but I'll let it stand) pump.

It's a well worn path.
Thanks ill give this a try tomorrow

ARH

2,017 posts

268 months

Tuesday 3rd July 2012
quotequote all
Oil in the carb dashpots.

Did it run before the diesel episode? if so I would suspect there is nothing wrong may just need a bit more time to flush any remaining diesel.

v8250

2,747 posts

240 months

Tuesday 3rd July 2012
quotequote all
op, providing tank, lines, carbs, filters, and cylinders are void of diesel and flushed clean your fuel supply should be good. check fuel pump working with ignition on only i.e. fuel being pumped to carb inlet. if this is clear and car was genuinely running beforehand the fuel supply should be good.

ref' ballast resistor, disconnect from common point at fuse box and buzz with meter for correct resitance. if no good temporarily fit new ballast resistor OR known working non-ballast coil. then the fault is electrical which will mean just fault finding in a logical way for any distributor based MG.

suggest you post on the following links with other MG Midget owners who'll be a big help and have experienced starting problems many times before; good luck.

http://www.mgcc.co.uk/mg-forum.html?func=showcat&a...

http://www.mgexperience.net/phorum/list.php?3

Flying Phil

1,735 posts

174 months

Tuesday 3rd July 2012
quotequote all
If you are getting a spark (one plug out, reconnect plug lead and crank the engine with the plug earthed on the engine) -then you can pour (Carefully!) a small (I use a capfull from 5 litre oil can) amount of fuel direct into the carbs (air filters off to do this) - try starting engine - to get the engine running for a couple of seconds - if it stops again then you know it is a fuelling problem.

na

7,898 posts

263 months

Tuesday 3rd July 2012
quotequote all
whether you're new to classics or not I strongly recommend you invest around £8 in the Driver's Handbook, this is not a workshop manual it's a reprint of the book you would have got when the car was new it will tell you about the controls and how (and how much) servicing of the whole car - (Ref: 0058) - http://www.mgocshop.co.uk/catalog/Online_Catalogue...

for additional advice on getting your car going try the MG BBS - http://www2.mgcars.org.uk/cgi-bin/gen5?runprog=mgb...

once you've got the car going I strongly suggest you run through a 36k mile service/check and drive the car regularly as this will help keep it in good condition and you learn to drive and exactly what it is capable of - it shouldn't be slow, poor handling or braking if it's in reasonable or good condition

although they are certainly needed the very popular to tinker with engine and carbs are not the most important elements of a car - the brakes, tyres, steering, suspension, lights and windows are much more important - a moments though will tell you this

tyres are often overlooked on classics, regardless of the amount of tread on them if they are more than 6 years old and/or very little use in that time get them checked and even if they are OK new tyres will probably improve your braking, steering, suspension, road holding, ride comfort and noise

that's my bit over

auxilarygrub8

Original Poster:

33 posts

171 months

Tuesday 3rd July 2012
quotequote all
Hi everyone thanks for your help the fuel Pp was blocked with sludge . Cleared and ran for a good 10 mins like a dream. Thanks for all your help

williamp

20,380 posts

302 months

Tuesday 3rd July 2012
quotequote all
auxilarygrub8 said:
Hi everyone thanks for your help the fuel Pp was blocked with sludge . Cleared and ran for a good 10 mins like a dream. Thanks for all your help
great. Now start enjoying it. The MG were always the best built of the whole Leyland range...

And yes, they do leak. And your feet might get a little warm. I had a midget when I was 19. A lovely car

na

7,898 posts

263 months

Tuesday 3rd July 2012
quotequote all
great, well done

I now strongly suggest you get a copy of the Driver’s Handbook - (Ref: 0058) - http://www.mgocshop.co.uk/catalog/Online_Catalogue...

run through a staged 36k mile service/check ASAP

and drive the car regularly

I doubt if this’ll be the only wrinkle you’ll get with the car especially if you don’t read that Driver’s Handbook

ETA: they don’t have to leak but they usually do but a lot of the time that is because of poor modern parts, previous and present owners or a combination of all three

good luck

auxilarygrub8

Original Poster:

33 posts

171 months

Tuesday 3rd July 2012
quotequote all
Hi everyone thanks for your help the fuel Pp was blocked with sludge . Cleared and ran for a good 10 mins like a dream. Thanks for all your help