MG-Cars.net

Welcome to our resource for MG Car Information.

Recommendations

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG Midget and Sprite Technical - Backfire at warm up

Hi Chaps,
I have a midget with a 1275 A-series running on a single HIF44. All runs really well except....
When the car is on choke I get a single backfire. It is always at pretty much the same place (about 300 yds from start as I go around a roundabout).
It is annoying more than anything else.. Anyone have any ideas?
Cheers
Tim
T Dafforn

Run a spanner over all the carb & intake fasteners, sounds like it could be going lean for a brief moment. Going round the roundabout something might be shifting and only happening when cold could be due to a gap closing up when parts warm & expand. Also check for a vacuum line leak on the pollution control equipment (if fitted) as certain systems work when cold, others when warm & it could be something in the cold running circuits.
s1

Thanks, I'll nip them up!
Tim
T Dafforn

This thread was discussed on 03/04/2017

MG Midget and Sprite Technical index

This thread is from the archive. The Live MG Midget and Sprite Technical BBS is active now.