Running Rich

[Madtrang]

My car has begun to run quite rich, @ the moment

my car is a r32 gts-t, running 12 pound boost, stock everything but exhaust.

What would be the problem most likely be, I haven't had a real chance to look, but would like to know where i should start looking.

Thanx...

[Revhead]

I know with the R33's, once you start upping the boost the ECU runs things very rich, kind of a fail-safe thing for what it sees as a fault condition.

What can you do if this is the case with R32's? You can reprogram the R32 ECU, get a PowerFC or similar, or get something like an SAFC, which you can adjust mixtures with (but not spark). I personally would probably go for the ECU retune.

[Madtrang]

ok, retune..

I have got the program to remap fuel maps, I know that the R32 computer is quite easily rertuned when it comes to reprogramming the chip.

All the electronics crap i could do

However my skills would lack in the actual mapping of the fuel maps.

What's the best method in remapping this. Trial and error, any guide lines...

also were could u get this done professionaly, rather do it myself though,... however, and how much we r talking here to get this done from a pro

[Madtrang]

how much would u get a power fc for, and how hard is it to install,

[Revhead]

PowerFC is a plug-in replacement ECU. Unplug the stocker, plug in the PFC, start the car, and start tuning. I got mine (with hand controller) for $1200 from a member on these forums, you'll find a few being sold around that money. Note that they are model specific, eg R33 GTS25t wouldn't work in an R32 GTS-t, and I believe they're also specific auto/manual too.

Look up a thread on 'tuning a PFC' or something similar to that, there are some good guidelines in there. I'll probably be giving it a bit of a go myself, to reduce the amount of fuel it burns before I put it in professional hands. The base map on the PFC runs very conservative.

The general consensus on these forums is that Gavin Wood is the best bloke to go to for ECU tuning in SE Qld, I have no idea what he'd charge for a tune but I'd be guessing somewhere between $500-$1000 for a full road tune (part throttle, light load, idle etc).

[Madtrang]

ok thanx Revhead

[rb25]

Has your O2 sensor failed?

[R31Heaven]

I have found when you up boost and put a 3" inch system, the car tends to run rich due to the better air flow.

[Madtrang]

Ah huh that be it, got a 3" exhaust