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any ideas anyone? i'm on the quest to cure my fuel consumption loss, so far i have changed:

spark plugs (all 4 were fouled serviced 5k ago, how long do they normally last?)
oil fiter (bleck as bleck can be)
castrol EDGE sport 10-60w (great oil but unfortunatly is going straight through my engine, will need a thicker oil)
02 sensor (cured my idle dip but not the fuel consumption)
leads (stockies were on the way out, again helped make the car run smoother)

next on my mind is the fuel filter, as i dont know how long ago it was done. anyone know where abouts they are ?

under the car, drivers side before the rear wheel

its got a plastic black cover over it

AZNTieN wrote:under the car, drivers side before the rear wheel

its got a plastic black cover over it

thanks, anything i should know of whilst i remove the old filter etc?

disconnect the fuel pump wire under the dash and start the car let it die was what i heard someone did
so fuel doesn't go everywhere

but i did that and fuel went everywhere anyway


do it quickly and you'll be fine
there might be instructions on miata.net s garage

MXHEVN wrote:

AZNTieN wrote:under the car, drivers side before the rear wheel

its got a plastic black cover over it

thanks, anything i should know of whilst i remove the old filter etc?

be ready when you pull the line off from the engine side & pinch it off by doubling over & holding it doubled over with a clothes peg, that'll stop the line draining back (the reason Wuns method didn't work is that fuel needs to be pumped to the engine, it won't necessarily suck it all up)......being an electric fuel pump there'll be some pressure behind it when you do pull it off, so wear some eye protection for the job.


oh, & don't light a cigarette, unless you have new for old replacement policy on your insurance

i'll keep that in mind aj thanks anyone know the symptions of when the fuel filter needs replacing? i'm hoping fuel comsumption is one of them ?

changing fuel filter is a PITA, make sure car is not hot otherwise you might be shi**ing yourself under the car when you see premium unleaded fuming away on the hot exhauset pipe (bad bad experience) make sure you do not break the plastic clips holding the fuel lines to fule filter as you will reuse them...

for the fuel consumption, i think coil pack also has a big effect, if your coil pack is old, then fuel consuption goes up...

silvermiata wrote:changing fuel filter is a PITA, make sure car is not hot otherwise you might be shi**ing yourself under the car when you see premium unleaded fuming away on the hot exhauset pipe (bad bad experience) make sure you do not break the plastic clips holding the fuel lines to fule filter as you will reuse them...

for the fuel consumption, i think coil pack also has a big effect, if your coil pack is old, then fuel consuption goes up...

thanks for the heads up, if the coil packs end up being a problem then i might need to do some reasearch on some splitfires

\"picture says a thousand words\"

Just thought I'd mention that opening your fuel cap to release any pressure would also help. I've done this hundreds of times but all on a hoist so I hope that is what you're doing.

I used drill bits of appropriate size pushed into the fuel lines (blunt end in obviously) to block them temporarily while replacing the filter.

Another culprit maybe fouled injectors, run some injector cleaner through and see if it helps (i do that every year or so)