Running rough, back firing and cutting out
Posted: Sun Aug 22, 2021 10:12 pm
Help and advice appreciated!
I have a 2000 mile post rebuild 150 bhp TC running on 40DCOE Webers. It has the following symptoms which I know must be related to the engine, carbs or distributor as the engine unit has been in 2 Elans and the same symptoms have occurred in both cars.
Here is what happens:-
- car starts well and runs well to warm
- the symptoms occur either when the engine starts to run hot in traffic and also during a run, at normal temperature, after 10-15 miles
- the initial symptoms are poor running which gets worse over a couple of minutes and ends with the car losing power, back firing and then cutting out
- the car will not initially start but 20-30 minutes later the symptoms have gone and the car sill start nicely
- after this process, the plugs are oily, not sure if this is cause or effect of the poor running and cut out
It has done this on different coils, with both electric and standard fuel pumps and after fresh plugs. It runs an electronic ignition and the sensor has been changed too.
Suggestions and any insight very much welcomed!!
David
I have a 2000 mile post rebuild 150 bhp TC running on 40DCOE Webers. It has the following symptoms which I know must be related to the engine, carbs or distributor as the engine unit has been in 2 Elans and the same symptoms have occurred in both cars.
Here is what happens:-
- car starts well and runs well to warm
- the symptoms occur either when the engine starts to run hot in traffic and also during a run, at normal temperature, after 10-15 miles
- the initial symptoms are poor running which gets worse over a couple of minutes and ends with the car losing power, back firing and then cutting out
- the car will not initially start but 20-30 minutes later the symptoms have gone and the car sill start nicely
- after this process, the plugs are oily, not sure if this is cause or effect of the poor running and cut out
It has done this on different coils, with both electric and standard fuel pumps and after fresh plugs. It runs an electronic ignition and the sensor has been changed too.
Suggestions and any insight very much welcomed!!
David