AFR running extra rich at WOT?

[eTiMaGo]

Originally Posted by Teruyume

well ur pedal to the metal right, so throttle wide open, shouldn't the ECU sense a wide open throttle and asume u wants power, rich mixture more juice gives u more power. From my knowledge during wide-open throttle ECU will run with pre-set configurations ignoring couples like MAF and O2.

i can read some articles on EFIs
http://www.autoshop101.com/autoshop15.html

Yeah but the thing is, contrary to popular belief, a richer mixture does NOT give more power! The main use for an over-rich mixture is to provide a cooler burn of the air-fuel mix, to reduce the chance of knocking, most especially in a turbo application. It also causes a lot of fuel to be unburnt, which results in worse emissions and mileage.

In order to get the most power out of a normal air-fuel combustion, the ration needs to be stoichiometric (14.7:1) or very slightly lean.

Anyway I got some free time today, I'll try to reset my ECU, clean my MAF sensor and see if this helps. Also (doh), I just reread that thread about the TSB for the catalyser linked to the sulphur smell, I don't know if that is an option here but it may solve that part of the problem.

[ChinoCharles]

Originally Posted by eTiMaGo

Also (doh), I just reread that thread about the TSB for the catalyser linked to the sulphur smell, I don't know if that is an option here but it may solve that part of the problem.

First thing I thought, but its cool we might have just found why it was recalled and why it smelled like that. I want an AFR gauge!

Thomas, do you have a fuel pressure regulator on that thing?

[eTiMaGo]

Originally Posted by ChinoCharles

First thing I thought, but its cool we might have just found why it was recalled and why it smelled like that. I want an AFR gauge!

Thomas, do you have a fuel pressure regulator on that thing?

An AFR gauge is kinda annoying most of the time as it just goes up and down, as the ECU normally normally switches between lean and rich to maximize the efficiency of the catalyser. But in this case it's kinda handy

No fuel pressure regulator, would it do any good with a stock engine though?

[ChinoCharles]

Originally Posted by eTiMaGo

An AFR gauge is kinda annoying most of the time as it just goes up and down, as the ECU normally normally switches between lean and rich to maximize the efficiency of the catalyser. But in this case it's kinda handy

No fuel pressure regulator, would it do any good with a stock engine though?

Your engine is stock!?!?! You need to fix that!

[eTiMaGo]

Originally Posted by ChinoCharles

Your engine is stock!?!?! You need to fix that!

Oh I will, I will....