PFC help

[R31 POWER]

I've searched but no answers.Q's for R32 RB20DET into R31 with PFC

Q1- How do I lower the revs when it's in cold start mode?because it revs at 1500rpm for way to long.

Q2- I have no speed reading on the hand controller but the speedo in my dash works wtf is up there?

Q3- Ever since I have installed the PFC sometimes when I back off the revs don't drop straight away and looking at the hand controller the injector duty cycle and AFM mV go up abit at this point and then drop.It's like a spike and is pissing me off.I can get a vid of this if know one understands.

[the phantom]

Q1: You dont.

The cold start idle speed is controlled primarily from a bimetalic, i.e. mechanical bypass device. If its staying on too long it could mean a burned out heating coil, or bad connection, or sludge buildup. It would then only rely on engine heat to activate the bimetallic and stop bypassing extra air. The ambient engine heat is what stops it from bypassing when the engine is warm.

hope that helps you with one of your issues at least...

[R31 POWER]

Thanks for the reply phantom.It is weird because it was perfect with the standard ecu and as soon as the pfc went in it turned to shit.I have cleaned the AAC valve but still no go.

[Chris32]

What about adjusting the AAC valve so it idles nice when its cold (around 1000rpm) then use the PFC idle function when its warm?

Seems to work for me

[R31 POWER]

Ok another Q

Q4- When you PFC people have the key on the ON position does your AFM mV show about 490mV going up and down?I can't remember if the standard RB20 AFM did this before the VG30 one.

[BoOsTeD_RB26]

Yeah mine comes up with a reading like that. Dunno why but something is registering. I wouldn't worry about it. Cos I don't hehe

[N I B]

Q2,31s have mechanical speedos.

TPS etc can cause your idle problems.

[slow_r31]

Q2,31s have mechanical speedos.

TPS etc can cause your idle problems.

actually

imports have mechanical

aus models have electric

[N I B]

Sorry

[R31 POWER]

Don't be it's cool Steve.Now this TPS what should I look out for?like what should it read on the commanda at idle?

I'm thinking it might also be reverberation as pointed out by someone because of the HKS GT2535 turbs?and the BOV not being able to vent off enough air.

I have a Greddy type S installed and it flutters on low boost and sometimes the revs don't drop straight away and looking at the hand controller the injector duty cycle and AFM mV go up abit at this point and then drop and on higher boost when the bov vents off heaps I have no probs!

[BlueRB240]

How about this one? Did you turn off the boostcontroler function on the PFC before you started the car?

[R31 POWER]

Yer it's off otherwise it won't start

[BlueRB240]

Ohh ok just checking. Do you have the software FClodgit or just the commander?

[R31 POWER]

Yer just the commander.It has been tunned and runs great but it's just those little probs that give me the shits.

All those probs above started to happen ever since I installed,stainless exhaust manifold,HKS turbo,nismo adj fuel reg,bosch 040 fuel pump,GTR cooler,Greddy type S bov and the PFC.SO it's hard to pin point what is causing it coz I did it all in one hit.

[R31 POWER]

I've installed a GFB Hybrid bov and instead of fluttereing like the greedy it actually vents air at low boost.So the jolting on low boost only happens alittle now.

[Roy]

New gearbox in?

[R31 POWER]

Not yet dude but i want it in and I got a 4.5kg moly flywheel to go in I also have 4:11's to replace the 3:89's in the diff so after they are in I want it tuned for good so i can play!!!!

[Roy]

I always liked playtime:)

4.11s, that what R32 GTSTs have std right? The shorter gearing and lightened flywheel will help liven things up :Party: ... :burnout:

[Cubes]

R31 POWER,

I think the lack of speed reading on the pfc h/c has some thing to do with possibly some one clipping wire 53 to remove the speed cut.

[Bl4cK32]

didnt u connect the wire 53 Joel on mine, when doing the AVCR? I still dont have it reading the speed as of yet...never have since the rb20 PFC went in...