sorry i do realise that this has been done to death but ive done almost everything to try and bring it up with no avail. tr 2.6 auto efi.. new plugs, leads, dizzy cap and rotor were done about 5,000ks ago, new oxygen sensor has been fitted about 500ks ago, fuel filter was changed about 6-7,000ks ago, the air filter has been blown out clean, even though i do need to change it but its not so bad at the moment.. and with all that im still getting about 440-460ks per tank. the best ive had was 520ks on new plugs city driving, i drive pretty light footed and rev at 2,500-3,000 max if not less. the engine does have 243,000ks on it but it has been serviced regularly, used the rocker cleaner before the last oil change and ive run the fuel system cleaner/injector cleaner through a little while ago. i do realise that cleaning the injectors is an expensive process so i want to avoid it if possible. what else can i do? would cleaning out the air intake/throttle help? are there any other suggestions?

thanks
Alex

Edit: the car is and has been running on at least the 95 octane

i took my injectors out myself (3lt v6) took all 6 in and had them cleaned and serviced it was only $150 its not that bad but that will depend where on this island you are

i took my injectors out myself (3lt v6) took all 6 in and had them cleaned and serviced it was only $150 its not that bad but that will depend where on this island you are

im in melbourne, that doesnt sound like such a bad price, im sure i can find in the manual how to pull them out, ill have a look at it anyway
thanks..
anything else that i should be aware of?
is it worth doing a major service at this amount of K'S? that will get quite expensive i assume.. if i take it in for a tune, what do they work on/adjust?

Why don't you diagnose the problem first before replacing parts willy nilly?

Also for an Astron, with a 55L tank (guessing?) that is actually pretty good fuel econemy.

How big is the tank, because if its 55L then you are pushing around the 12 L/100km around town and that is actually pretty good.

Also you can save a few bucks straight up and run just 92 ULP, it makes no difference to such a primitive motor so give that a try.

its 62 ltrs i think

You wanna get better fuel economy, try easing up on the right foot ! lol

Your present fuel consumption is about as good as you are likely to get in city driving. Magnas, particularly the 4 cylinder Astron, have never been economical around town. On the highway they are much better. With the high gearing and relatively low drag coefficient, they just loaf along when cruising. In the city, the high gearing is probably a disadvantage.

As others have said, you first need to tell us how many litres you are using! If it's between say 40 and 50litres for that many k's, then it's fine.
My standard fill, from about 1/8th full on the guage, is 45litres, which means theoretically I have a good 20litres left in the tank. So you can't just say "a tankful", you need to quantify it.

From the other perspective, you also need to weigh up cost vs benefit. Say an injector clean gets you another 50k's pre tank. That's about $5 worth of fuel. So you need to fill up 30 times before you see any cost benefit at all.
Which also applies to the "upgrade your car to something more fuel-efficient" argument. You'd have to fill up a $hitload of times to make up the extra thousands you spent on the smaller, weaker, lower quality car.

Hope that might make you feel a bit better about it.

So a 62L tank would really have only about 55 useful litres in it, which means you are getting good fuel econemy for a Astron II motor.

Usually astrons use that much oil between services, so I think you are doing pretty well mate :D

right, thanks for your replies..


Also for an Astron, with a 55L tank (guessing?) that is actually pretty good fuel econemy.[QUOTE]

the tank from full to empty is 62 litres, as i stated in the first post i used to get about 520kms city driving, as opposed to the current 440. i went down to phillip island about a week ago, filled up with premium and about half the tank i used on the trip there and back, as you guys might know, its a pretty constant speed most of the way. i hardly pushed 500kms out of that entire tank.

[QUOTE=Johnny Cash]You wanna get better fuel economy, try easing up on the right foot ! lol

as i stated in the first post i dont rev my car past about 3,000 and the averange range is more like 2,000-2,500 revs unless i have to jump into a gap on the freeway or overtake, i think thats pretty lightfooted


As others have said, you first need to tell us how many litres you are using! If it's between say 40 and 50litres for that many k's, then it's fine.

Which also applies to the "upgrade your car to something more fuel-efficient" argument. You'd have to fill up a $hitload of times to make up the extra thousands you spent on the smaller, weaker, lower quality car.

Hope that might make you feel a bit better about it.

at this point i get about 440kms per 56-57 litres, and im a student, so another car may just be slightly out of question :confused:


Why don't you diagnose the problem first before replacing parts willy nilly?

the leads were quite a few kms old and the engine was misfiring at one point with either the plug or the lead being faulty (and yes i know which one was it so it wasnt a random guess). at this point i thought the time has come for new leads and it was recommended that dizzy cap and rotor be done at the same time. i get all the car parts at trade prices so it doesnt cost me all that much if i do the labour myself. with the O2 sesor i thought it was the most reasonable explanation at that point in time, since most fuel consumption problems discussed on these forums end up mentioning the O2 sensor at some point.

im thinking i might take it into mitsu, they might be able to diagnose something

thanks anyway guys
Alex

So which fuel are you using now? Have you changed fuels between the first results and the new ones?

I've been using United's (or Neuman's, or Freedom's) E10 for at least 1.5years now, with good results, but recently I tried Vortex 'cause I had a 10c/litre off voucher. I actually got MUCH WORSE fuel economy using Vortex, got like 380km's off 45l rather than my usual ~450km's, and this included at least 250km of freeway driving! So maybe your car is having an adverse reaction to "premium"?

fuel economy sounds right to me. I used to get 400km on 48-50 litre consistantly.

So which fuel are you using now? Have you changed fuels between the first results and the new ones?

I've been using United's (or Neuman's, or Freedom's) E10 for at least 1.5years now, with good results, but recently I tried Vortex 'cause I had a 10c/litre off voucher. I actually got MUCH WORSE fuel economy using Vortex, got like 380km's off 45l rather than my usual ~450km's, and this included at least 250km of freeway driving! So maybe your car is having an adverse reaction to "premium"?

hmmmm.. that could possibly be the case, since i have upgraded to premium since those results.. i guess thats one thing to try out.. whats this E10 fuel? what does it go by at united? at this moment im varying depending on which station is more convenient, but never fill up with anything less than 95

E10 is 10% ethanol. 95octane, and costs less than standard unleaded.
Might require a run or two to clean out the crap in your fuel tank, so could run rough or have troubles to start with, but should settle in nicely after that. I never had any troubles, but I have heard others express other experiences.