Running Lean- Other options to ecu remap?

[SR32]

Heya, after some suggestions.

My 32 is running lean. On the dyno it was idling at like 18 (a/f) and im told it should be at around 12

The ecu was remapped in Japan and im guessing to suit their 110/115 octane fuel. I think that is more than likely the problem, although have not checked fuel pump yet. Injectors are 650cc so they should be ok i guess.

It's going in on the dyno again to see if the problem can be located.

If the ecu does need remapping (which i currently cannot afford) can anyone suggest a cheaper, short term alternative?

Am using octane boost at the moment.

Cheers

[someonestolecc]

Stop boosting

What's the .18 and .12 in AFR? If it means 1:18 and 1:12 then at idle it should be lean (you're not on boost).. mine idles at something pretty lean too but when it hits the boost it stays at 1:12 and richer.

[NickR33]

swap it for a stock ecu, see if the problem goes away

[SR32]

I have been trying not to drive on boost.

Those ratios sound right (i lost my dyno sheet).

I spoke to my mechanic and after giving him more info he thinks its just the fuel pump, so looks like i could be wrong and ecu may not need a remap!!!

Will check pump, if not pump will replace ecu with stocker.

Cheers

[Abo Bob]

I think it's the fuel pump on the way out or could be the regulator not adjusted properly if it's adjustable in the first place.

[SR32]

Will add to the list, Thanx!

[xRHETTx]

Jaycar DFA and handcontroller, group buy happening at the moment, does the same thing as a SAFC but costs about $100 plus your time to put it together.

[SR32]

Wanna know some freaky shit, went to hyperdrive to source the problem and she's running no where near as lean as the previous dyno stated (that was at a workshop im quite unhappy with that will remain nameless). Running on the same boost today as she was the previous dyno run 2 months ago- nothing had been changed inbetween!!!

Boosted her up a bit and wallah, she's now running rich.

Boy is that a relief. Muchos gracias hyperdrivers =)

[Abo Bob]

Excellent. Gotta be happy with that.

[SR32]

More info on this -

Apparantly dynos need be serviced/reset after a certain amount of runs otherwise their accuracy fails.

Think this may have something to do with it.

[blind_elk]

Sounds like your original tuner had a crook A/F meter. Might be worthwhile mentioning it to him.