320i OVERFUELING PLEASE HELP!!!!!

[BOLDY]

My 320i is over fueling and im going through a hell of a load of fuel for the milege im doing. It only just past the MOT on emissions after 2 hours of tinkering by the mech. Ive changed everything i can think of:

Air flow meter
Put original airbox back on
Dizzy cap
leads + plugs

I cant think of anything else can some one help me?????

[320Touring]

Hey-i'll try and help you mate.

Increased fuel consumption can be caused by several things, I see you have changed all the basic service items (rotorcap, sparks etc). On the m20, poor fuel consumption can also be caused by the engine running cold.

does your temperature gauge sit at the 1/2 way point once the car has been run for about 10 mins? If not, then your thermostat is probably stuck open, making the engine cooler and the ECU think the car needs more fuel.

Does the car feel"lumpy" when started from cold? If so, It could be the blue temp sender behind the thermostat that is giving incorrect readings (causing more fuel that is needed to be added).


hope that helps?

Neil P

[BOLDY]

That is one thing. the gauge never gets to half way.

Nice one cheers for that

[320Touring]

cool, so thats the place to start looking!

go to

http://www.e30zone.co.uk/modules.php?na ... ervice.htm

and you'll find a step by step procedure for changing the thermostat/bleeding the coolant