GFB Respons TMS + MAF doesnt run ritch??

[Aurai]

LOL? do Auto BP\'s have turbo Issues? Ive got a mate about to get one, anything I should know?

And nah I wouldnt, I need this car in mint cond. to fund the STI!

[Kiwi_Fozze]

well known to destroy turbos.

[Aurai]

Oh s***, how come? I know they ran a smaller turbo, vf38 as opposed to tdo4, is the issue with the turbo or something else?

[Guest]

 kwi_fozze said:

well known to destroy turbos.

...and gays are not ok. But really the world is split on this just like the holden/ford thing.

[Kiwi_Fozze]

oil starvation issues causing turbo to bugger itself. oil needs to be done every 5k (owners manual may be incorrect, subaru japan released a modification to manual) check the oil feed banjo\'s, remove the filters in the banjos if you can.

bit like a lottery, some go, some are perfectly fine.

dare i say, the majority are fine, and those that have issues are just really vocal about it... *shrugs* ymmv

[Guest]

Thought you were referring to no bovs but I see what you meant now.

[Kiwi_Fozze]

minor thread diversion... its related i swear!!!!

[WRXONP]

Still struggling to see how the engine can run rich when the bov is venting - because like I said soon as u let the gas off the injectors are off- so when bov is venting the injectors are off unless you have turned fuel cut off on the ECU

My wide band doesn\'t go rich before it shows the fuel cut is working ??

If it was going rich when the valves venting - you would have a machine gun of backfires when the valves open

[nickch]

 WRXONP said:

Still struggling to see how the engine can run rich when the bov is venting - because like I said soon as u let the gas off the injectors are off- so when bov is venting the injectors are off unless you have turned fuel cut off on the ECU

My wide band doesn\'t go rich before it shows the fuel cut is working ??

If it was going rich when the valves venting - you would have a machine gun of backfires when the valves open

It\'s not so much running rich at the point you lift off the gas.

Take the time it takes to change gear:

1) Release throttle

2) Change Gear

3) Back on throttle.

The rich condition happens as you get back on throttle.

In a recirculated system where the air is put back post MAF, the ECU has already calculated x liters of air in the system. When you dump it to atmosphere, instead of x-litres, there actually is only x-(volume dumped) liters.

So, when you get back on power (on step (3)), ECU thinks there is x litres, starts squirting fuel to burn x litres, hence rich condition, excess fuel goes out exhaust, back fire, stutter.

[WRXONP]

I\'ve never had a car that back fires when u come back onto the gas after a gear change - with venting bovs or no bov what so ever

At least rich is 100000x better than going lean

[nickch]

 WRXONP said:

I\'ve never had a car that back fires when u come back onto the gas after a gear change - with venting bovs or no bov what so ever

At least rich is 100000x better than going lean

Again, YMMV..

Sometimes its not too rich to the point where it will backfire, but will still cause carbon build up, which accumulates in the long run.