yep nothing wrong there. Are all the gaps the same ???
Last edited:
The plug colour looks ok, the gaps look enormous, but that could just be the photo.
Three seem to have rust around the threads, which might suggest water in the bores. Are you losing any coolant?
I rode a 60 bhp bike 100 miles on motorway. When I arrived the rear disc was blue and so hot the black painted centre had lost all its paint leaving no sign it had ever been painted. The brake caliper had seized. Fuel consumption was not measurably different.
Mk2 Punto Abarth had to stop every time I used the brakes because a front disc was binding. Had to hit it with a block of wood to free it off and avoid using the brakes. New caliper needed but again fuel consumption did not really change maybe 1 or 2 mpg.
Drove up to Scotland and got an average of around 43-45mpg.
That doesn't seem that great to me on a real long run?
No idea what could be making the mpg so crappy?
45 is reasonably good for a old petrol engine I get that sort of mpg from my 2017 fiat tipo 1.4 16v
It could be the pre-cat O2 sensor. If the ECU thinks the mixture is weak it will add more fuel. You won't smell it in the exhaust as the cat burns it away.
A slight missfire (as could be caused by a failing coil) has a similar effect. The unused oxygen causes the ECU to enrich the air fuel mixture. That soots up the sensor and the plugs aggravating the problem.
Sorry I forgot that you'd changed the O2 sensor. I cant remember if you are using MES to read the ECU codes and parameters, but it would be a good idea to get a datalog scan while the car is driving.
Coils can be tested for resistance. Agree simply swapping them out for new is not a great idea.