Engine Cutting Out

[Guest Simon M]

My hood has a Weber 2V 30/34 DFTH carb & Esc II ecu.

Starts OK, reluctantly if left a week or more.

 

It was first noticed after driving 15 miles, but now after 2 or 3 miles it starts missing/coughing. Ticks over OK, not quite as smoothly as before, but hesitate again when any power's called for. Sounds as though carb is sucking harder than normal?

 

Took top off carb, after a run, to check float height- fuel ~15mm from top of chamber, but seemed to drain away by 10mm over the next 15 minutes? Mechanical fuel pump diaphram & non-return valves seem OK

 

Anyone any ideas what the problem could be, fuel or electric?

 

Cheers Simon

[Guest madmax]

Worth checking your coil. Colin

[Guest Simon M]

Checked coil resistance, within limits. Plugs OK and a good colour.

 

I was wondering about my leads could they cause this problem if defective?

 

Anyone any ideas?

Simon

[Guest gordon_macnab]

You can check your leads by measuring the resistance in them, they all should be similar.

 

Probably worth buying a new set anyway to eliminate them as they're not too expensive.

 

Gordon

[Peter Bell]

Could be just muck in the tank blocking the fuel supply, do you have any filters in the line? Poor fuel supply is a very common problem, ticks over ok but when you need a bit of power it gives up.

Peter

[Guest Simon M]

Thanks for that

 

I'll check/replace the leads first.

I'm still not sure if it's fuel as I can get full power, it seems intermittent.

 

Cheers

Simon

[Andy Spencer]

Poor fuel supply is a very common problem, ticks over ok but when you need a bit of power it gives up.

Tell me about it!!!

 

Just spent days trying to work out my fuel starvation problem, and it was an inline filter. Even if you are unsure, change them anyway, because that's how I sorted mine even though it looked OK.

 

Andy

[DAVE CASTLE]

check carbon brush in top of dizzy

[Guest Simon M]

Managed to sort it.

 

Had a home tune guy round- electrics all OK.

It was debris in float chamber. Also changed the mechanical pump, only £17, as he said there was little suction from it.

Mixture adjusted and running better than ever now!

 

thanks Simon