Help! Only Getting 277 To A Tank :/

[Ausdogga]

G'day guys, so I went and seen a guy he said my problem was that off of the stock bov because I didn't have the piping that went to where ever it goes was missing that's what was making it run rich, is this correct, I can't see how it would make any difference.

Cheers.

[DVS JEZ]

Its very possible.

In short. Afm measures air coming in so ecu knows how much fuel to add.

But when bov releases air the ecu doesnt know this and still throws all the fuel in so it creates a rich condition therefor uses excess fuel

[wolverine]

Does that mean a massive pre-turbo post afm leak or was the fitting on the intake pipe plugged?

[mad082]

If the stock bob was venting to the atmosphere, and was done so be simply removing the plumback pipe, then yes that will make it run rich as the stock bov has a hole that permanently lets it bleed air off. Might be worth taking the bov of and checking to see if the hole was blocked.

[Iron Mike]

G'day guys new here, have a question for you guys, a lot of the skizza drivers where I live are to snobby to talk to me, so the problem is I only get 277km to a tank on 98, I've replaced the fuel reg, oxy sensor, cleaned the AAC vavle, blew the lines, what els could be contributing to this?

Cheers, Aus.

LOL you're blessed! I get only 180km per tank

[Jack0R33]

180km with your R34 GTR? I got 390km this week, i think that's still a bit low... car is stock apart from a catback too.

[ima_slap_joO]

Wow, I get 500km per 50l, I baby the car though, just got front mount and exhaust, but yeah you guys must be really getting smashed with these petrol prices. I get roughly the same km on the worst or best fuel economy wise.

[Jack0R33]

That's what i'm after! Even if i baby the car (which is hard) i'd get 420 maybe? I've had the 33 for 5ish months now, i have new genuine coil packs, new sparks and oil. Yet to do fuel filter, other oils, and o2 sensor. Hope it improves after that.

[ima_slap_joO]

That's what i'm after! Even if i baby the car (which is hard) i'd get 420 maybe? I've had the 33 for 5ish months now, i have new genuine coil packs, new sparks and oil. Yet to do fuel filter, other oils, and o2 sensor. Hope it improves after that.

You are probably losing a large percentage of your economy by those little squirts that you don;t really need to do, when I say I'm babying it, I mean I shift at 2200 rpm, 30% throttle so neg boost, roll down hills, lights and roundabouts, I know it's not really practical for most people to drive like that but yeah, just trying to get 2 weeks out of a tank, to and from work, 6 days a week, HEAPS better economy than the elgrand I had, but driving pretty much as slow haha.

[Missileman]

the more you use your brakes, the less your fuel economy, true story

[Missileman]

hint, the earlier you get off the throttle the less you use the brakes

[milanr34]

I would suggest to do a 100k service and check all your piping.

I used to be lucky if i can get 300km out of my 34gtt while babying it.

Replaced the sparkies, coil pack, belts, oil, o2 sensor, waterpump etc etc....reset the computer and now with babying i can get over 500 a tank (my maths being i was babying it till the half way mark and i did 275kms - not the most accurate but will do hehe)

[Dose Pipe Sutututu]

G'day guys, so I went and seen a guy he said my problem was that off of the stock bov because I didn't have the piping that went to where ever it goes was missing that's what was making it run rich, is this correct, I can't see how it would make any difference.

Cheers.

Makes all the difference in the world as the stock BOV constantly bleeds air, so your car's ECU is constantly accounting for air that's not even being ingested by the motor. This will lead to it running rich off boost etc..

Also is the return line blocked off at least?

[Jack0R33]

Milan: I don't see why a 100k service would help much? The previous owner has had my timing belt changed with receipts, by UltraTune though, cost the owner $490 back in Oct 2010.

The car has no leaks (rocker cover was leaking now great). I have noticed that after changing my coil packs and spark plugs the car runs a lot smoother e.g. 3rd gear doing 70km/h at 3000ish rpm, i thought i was in 5th because engine noise was so low and smooth, before it used to scream just a little louder. I got 450ks to the tank this week but i had an extra 8L added 2 days ago(helped for 80kms i think), when i filled up today i put in 58L! Gonna check how far this goes, will try to drive normally... .

John: So i should get my stock bov piping checked?

[Jack0R33]

I don't think my stock bov piping has ever been tampered with though...

[milanr34]

could have been because of my O2 sensor being faulty, either way the whole thing did the trick. Good to hear you are getting 450kms+ on a tank

[sedy]

hi, i was getting under 300kms per tank as well, i now get just over 500 around town, the only things i did was put a new coolant temp sensor in (same as n15 pulsar) and i put dielectric grease on the top of spark plugs and coilpack springs (clean the bottom of the spring with some 400 grit sandpaper first). Hope this helps!