Power Fc Trouble With Throttle Control And Shifting

[Duy]

Got the car dyno today made 206rwkw with HKS 2530 FMIC and PFC. Now when I shift at high rpm (5000+) it will bog down with a cloud if black smoke on the gear change on every gear. I have done a map trace and checked Loads that the PFC used on the gear change and all is good. Second thing is I can not modulate the throttle to control and drift as the car jerks violently,eg if you boosted to 14psi and back off then on again, But it drives fine with good a/f mixtures.

[Sydneykid]

Atmo BOV?

cheers

[Duy]

ATMO ? I have a HKS sequential with no return to inlet! would that be the case. I have fitted the stock ECU and it cures the issuse with everything the same.

[dead32]

surely you culd tune around a atmo bov with a pfc? atleast i hope so cause thats gona be the case soon for me.

[str8g]

Try checking the problem out while the car is on the dyno.. Nice rims by the way.

[Duy]

I can't check it on the dyno as you need to be on and off the gas quickly, as you would drifting through a bend.

Cheers

[Sydneykid]

surely you culd tune around a atmo bov with a pfc? atleast i hope so cause thats gona be the case soon for me.

Only if the tuner knows what he is doing, many don't.

Take it back to whoever tuned it and tell them the problem.

cheers

[paulr33]

or fit a real working blow off valve, as nissan had intended it.

a plumbback will work best for your car, turbocharger and ecu/tune.

i suspect this will be much cheaper and a far better solution than tuning around it.

[mad082]

somehow i don't quite think that the bov is the whole cause. the fact that it goes away when the stock ecu is put back in says there is a problem with the tune.

[paulr33]

you'd be pretty hard done by to make a tune to do that

[Duy]

Anyone got a PFC map I can compare with?

Cheers

[paulr33]

try here

http://www.skylinesaustralia.com/forums/in...9377&st=260

[GTR-Ben]

You could always do what this S15 has.. probably have trouble finding room but it looks cool.

So if we want to "tune" around it.. what is it that most tuners don't know?