fuel consumption

[kev-yorks]

Might be worth getting the injectors cleaned, does seem low for a 13b as i\'m getting similar or slightly better with mine i think. I never really check the consumption but it used a tank to get to the Thor dyno day and back which is about 280miles round trip and there was a reasonable amount of high speed on the way back.
Kevin

[DMRH]

it would seem we\'re getting no more than around 320 kms (200 miles) to a tank. that\'s with my girlfriend commuting in the car, not driving particulary hard. would anyone have any suggestions for improving consumption?

Yeah. 9 out of 10 times, its the Air Flow Meter

Get another AFM & try it. the spring tension goes in the AFM & allows the vane to be pushed in further for the same air. The ECU thinks its getting more air than it actually is so increases the fuel to suit. Your engine goes rich, your consumption goes up.

Compare spring tension with another one & use the one with the strongest spring.

Make sure it says "N390" on the part number as the (NF01) 20B version is calibrated differently.

REgards

[Ultraman_Cosmo]

thanks dave that does sound very much like a possibility! now, where can i find another air flow meter?

[DMRH]

thanks dave that does sound very much like a possibility! now, where can i find another air flow meter?

I have a few N390 AFM\'s but the issue here is whether they are any better than what you already have. I would hate you to waste your money & get one from me with even worse spring pressure thus giving even worse fuel consumption.

One way would be for you to send me yours & I compare all mine against yours in a test thus giving you the best one back. Another way is to purchase a new one from Mazda. Expectaround AU$500 for that.

Another way is to sourse a JC 13B-REW engine from a rotary wrecker/importer that has the AFM attached & do a deal.

REgards

[Tim_Burgess]

I did a run from Bristol up to see family in Woking recently and averaged 26 to the gallon from my 13b.

Mind you that was a steady Sunday morning motorway run at 75 - 80 mph. Dont really want to push my luck as I\'ve got 6 points on the licence at the moment.