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All  |   Discussion (0)Carburettors

If you find your car suddenly slows down and goes at about 10kmh for a while before speeding up again, it could be a bad carburettor.

Other symptoms are spluttering when switching off the engine, frequent stalling, difficulty starting due to apparent fuel delivery problems and poor acceleration.

The best remedy is to get it to a fuel system/carbie/EFI specialist. You will save quite a bit on fuel so whatever you pay there will be somewhat offset by that. Over time it will pay for itself.

By your self you can check for cracked, broken or slipped off vacuum hoses on the carburettor. Your charcoal cannister may also be fully used, making it hard for the unit to breathe. Also change your air filter and adjust the idle speed to 900rpm, which is often accomplished by turning a knob on the back of it.

You should also consider a fuel tank/fuel line cleanout with compressed air or fuel additive. And replace all vacuum hoses on the carburettor every two years - by then they are all hardened and less effective.

Do not attempt to adjust the fuel mixture screws or anything designed for specialists to meddle with - they are too complicated. If one adjustment is out of sequence, you will never get it right.

You can expect a MUCH quieter and more fuel efficient car with a professional overhaul or adjustment. You may also save time as the car should start almost 100% of the time then also. Most workshops offer a six-month warranty so a large part of the cost will be returned to you in lower fuel costs over that time.   [guest]

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If your carbuerretor starts to behave differently in colder weather (splutters when the engine is switched off, stalls at idle), that's due to atmospheric changes that affect the humidity in the air. You can get it retuned at a specialist because they use a machine which takes the surrounding air into account.   myxlfidian (150)

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