Jump to content
SAU Community

Recommended Posts

  • Replies 60
  • Created
  • Last Reply

Top Posters In This Topic

I also have a aotomatic turbo R33 and was looking at buying a after market ecu like the apexi pfc and been shopping around 4 a good price and doing sum research about them 4 my car and i was speaking to a company on brisbane southside called fist performance and audio and he said u can use the pfc on the auto and it will work but he has to order it from japan if wanted it .

I think he was just trying to sell you a PowerFC - unless of course there is a specifcally reprogrammed "auto" version around?

I have seen Power FC for Toyota autos, but never Nissan autos. I have no doubt the manual Power FC will run the engine, I have driven an auto R33 GTST with a Power FC. The engine runs perfectly, exactly the same as a manual R33 GTST. But the gearchange quality was crap in my opinion. It flared on up changes, swapped between gears under even load and the kick down was eaither lethargic (sometimes) or viscious (most times). All of these symptons are logical in light of the manual Power FC not having the programming logic for ignition retard and cut during gearchanges.

I should point out that the owner was completely happy and was quite willing to sacrifice a "small amount" (his words, not mine) of gearbox niceness for the power he got from the Power FC and its tuning. So until the gearbox eventually fails from this excess loading, it comes down to personal opinion. I don't know that I would want to try and claim warranty on "personal opinion".

Since I want to keep the standard gearbox niceness and life, retaining the standard ECU auto programming logic is a must. Unitil I find a guaranteed replacement ECU that is. :D

  • 6 months later...

its actually on a s13 with sr20det but think it would be similar.

the problem is the fuel pump i think, its not priming when you turn the key on, and not running at all.

even when you directly wire it into 12volts and it runs still is not starting, my friend seems to think the power fc has to "see" the fuel pump.

anyone know the water temp sensor voltage when cold?

its actually on a s13 with sr20det but think it would be similar.

the problem is the fuel pump i think, its not priming when you turn the key on, and not running at all.

even when you directly wire it into 12volts and it runs still is not starting, my friend seems to think the power fc has to "see" the fuel pump.

anyone know the water temp sensor voltage when cold?

What have you done about the Park/Neutral switch from the auto? If you don't switch it on or bridge it out, the car will not start. ;)

ok, a little background info to help you.

the car is a 180sx s13 1991.

it was manual, converted to automatic - working fine with stock ecu for about 1.5 years.

when you plug in the power fc, the car will not start and the fuel pump won't prime or run.

we believe it is because the power fc thinks the water temperature sensor is faulty.

in the menu it shows that the Water temperature sensor has a voltage or 4.88volts when cold.

so i plug in the standard ecu and my consult board, the water temperature sensor is working fine, showing the correct temperature.

ok so now the car is heated up with the water temperature around 60degrees.

we plug back in the power fc and sure enough still 4.88 volts for the water temperature sensor. obvously the power is not even reading it properly.

the power fc shows this voltage as an incorrect voltage, meaning it thinks the sensor is broken, it definately is not.

my guesses:

-power fc is faulty

-power fc is wrong model (there are 3 or 4 models for the s13 alone)

-standard ecu was the wrong one for the model and sensor have been changed to match.

(the sensors were changed in later models)

NOPE looked on fast and websites and it is the right ecu for the car.

also checked the model of the power fc out and it is the correct model.

we are stumped.

also when we plugged in the power fc the first time, even when we pushed the throttle the TPS voltage would not change, the second time it was working fine, which makes me lean towards faulty power fc.

this power fc has been bought new ordered from apexi japan.

More than likely you have either not plugged it in fully...or you need to run thicker gauge wiring to the battery for the 12v source.. anyhow, i'm just regurgitating..

It's all here in the very excellent PowerFC FAQ by paulr33 :)

http://members.dodo.com.au/paul/skylinesau...erfc-faq.htm#18

I just wonder could PFC fits R34 GTT auto? The reason i'm asking is because even i shifting it manually,i felt the gearbox is not shifting/response fast enough in the high RMP.  

Is any GTT auto mates has the same feeling as mine?  

cheers

steven

Hi Steven, no it won't work, not even close. Nissan automatic ECU's have shift logic (eg; they cut ignition on gearchanges to smooth them out and help the gearbox to last longer). This extensive amount of logic is not programmed into Power FC's, I guess Apexi figured they would have to charge too much or they don't want to get into auto gearbox programming.:P

More than likely you have either not plugged it in fully...or you need to run thicker gauge wiring to the battery for the 12v source.. anyhow, i'm just regurgitating..  

It's all here in the very excellent PowerFC FAQ by paulr33 :D

http://members.dodo.com.au/paul/skylinesau...erfc-faq.htm#18

10 points to predator, yep my friend didn't use a socket set each time and it wasn't all the way in on the plugs.

sorry for wasting your time! ;)

Was looking around for an ECU for the auto too. Like Sydneykid I'm not keen on sacrificing long-term durability though. At this stage I'm looking at getting either an e-manage or SAFC, maybe SAFC because it looks easier to tune. Obviously it won't give the performance kick of a full chip replacement but I guess that's just life hey :cheers:

As far as quick shifting goes, there was a member on here called Dragon, who bought an upgrade chip which shortened the lag time between shits, not sure who made it though?

Most of the guys with the autos can run the e-manage with no problems, my one has been serving me fine.

Nissan automatic ECU's have shift logic (eg; they cut ignition on gearchanges to smooth them out and help the gearbox to last longer).  This extensive amount of logic is not programmed into Power FC's, I guess Apexi figured they would have to charge too much or they don't want to get into auto gearbox programming.:cheers:

Just a thought -

the big killer of Autos is heat, and the slower the shift the more heat they produce. (but the smoother the ride for the general public)

The shift kits that are being sold through the group buys section seem to be a hit, and they too give quick shifts, and reportly wont harm the longevity of the auto.

SK, are you comming down to Malalar soon? the offer is still there if you want to try out my auto R33 with the PFC.

SK - where is the Shift Logic kept on Nissan Automatics? Is it on the Main ECU or the second Auto ECU?

I wonder if you were to swap the Main ECU's from an Manual into an Auto from a same model car if it would work?

If the Shift Logic is kept on the Auto ECU i see no reason why it wouldn't work.

If that is the case then the guys doing remaps dont have to worry if the ECU they're working on is from an Auto or a Manual car. Right?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • LOL.... a good amount of people (not all) on that continent seem to know everything and like to measure things in bananas, football fields, statue of liberties instead of the metric system lol.
    • I assume the modules are similar enough, so if you've had no issues I don't see why I would. I have tried to find a wiring diagram for the FPCM / fuel pump circuit, but I can't find it anywhere. Otherwise, I would just do some wire cutting and joining at the FPCM and give the 12 V supplied to the FPCM directly to the pump instead. If you know anyone that could help with wiring diagrams, I'd be very happy  
    • If it dies, then bypass. The task isn't difficult. I have one running on a standard R32 FPCM. That's after nearly 20 years of it running an 040, which pull substantially more current than the Walbro. They're not the same module, but I'd hope it indicates that the R33 one should be man enough for the job. I think people kill them when putting proper sized pumps on them, not these little toy pumps we're talking about here.
    • Silicone spray won't hurt anything. And if it does, that's an opportunity to put some solid steel spherical bushings in, so you can really learn what suspension noise sounds like, If you're going to try it, just spray one bush at a time, so you can work out which one is actually noisy. My best guess is that if the noise started only since putting the coilovers in, then it is just noise being transmitted up through the top mounts of the struts, and not necessarily "new" noise from bushes. But it's almost impossible to know.
    • Are you saying the 34 is SUV height, and not that we're talking about an SUV here? (because if we're talking about an SUV, you don't fix them. You just replace them when something breaks. Not worth establishing sufficient emotional connection with an SUV to warrant doing any work on one). I wouldn't jack my car up on a short little loop of 10mm steel rod poking out through a hole in the bumper bar, front or rear end. I realise that we're probably not talking about that type of loop at the front, being the one under/behind the bar on a Skyline.... but even for that one, trying to jack up on what amounts to a thin piece of steel, designed purely for withstanding a horizontal tension force, not a vertical compressive force (and so would be prone to buckling/crushing) and, my most particular bitch about it - located RIGHT AT THE EXTREME FRONT OF THE CAR, applying a load up through the radiator support panel, etc, with almost the entire mass of the car cantilevered between there and the rear wheels? Nope. Not doing that. Not on the regular. That structure out there in front of the front crossmember is not designed to carry load in the vertical direction. Not really designed to carry any load at all, really. The chassis rail that the tow point is connected to would be fine loaded in tension, as per towing. Not intended to carry the mass of the whole car, especially loaded all on one rail, with twisting and all sorts of shitty load distribution going on. No, I will happily drive up on some pieces of wood, thanks. That can only happen on driven wheels, and they are at the other end of the car, and this problem does not exist at that end of the car. And even then, I have been known to drive up on at least 1x piece of 2x8 each side at the rear, simply to reduce the amount of jack pumping necessary to get the car up high enough for the jack stands. What really really shits me about Skylines is the lack of decent places for chassis stands at either end of the car. You'd think they'd be designed into the crossmembers.
×
×
  • Create New...