My son has an old fiesta 1.1 N reg which must have been the last of the old style mk2 fiesta. We've noticed the spark plugs seem to be quite black and sooty which implies the fuel/air mixture is running rich. Is there any way of adjusting this as it uses a central fuel injector not a carburettor ?
Thanks Tony
Firstly, are you sure there's actually anything wrong? Does he do a lot of short journeys?
He does mainly short journeys so I would expect it to some degree. The reason we looked at it was that the plugs got so dirty, the engine started to misfire so I just wanted to check there isn't an adjustment that may be set wrong ?
Tony
they suffer from temperature sensor failure and connector problems to the same. First step is a good general service, and have a good look at the CTS and plug.
When did it last have an air filter change?
Chris
AND the air temp sensor in the base of the air cleaner- usually always dead / poor connection.
Tim.
Have something to add? Share your thoughts — no account required.
Ask the community — no account required