Fixed..

I remember in an old pic of Stephan Max's shown here : This pic always stuck in my mind and I should have put it this way to begin with...well...

This is his Z32 MAF wired up and on the piping the "correct" direction..

Well when I put my MAF on, I put in so the connector was pointing Down towards the ground...for some reason that affected the MAF air reading or something along those lines...

I was back by my car and decided before I go ripping out the ECU and MAF and switching back to A32 stuff, Ill try turning the Z32 MAF....well I tured it just like Stephan Max has his turned in that pic, and It is FIXED....I nearly turned it 90 degrees and that effected it that much...

I started up expecting to have a loopy idle and its not...its idling perfect and drives normal...the car feels good..

-matt
Thanks guys for everything

 

Thats great news. Maybe that should be a sticky!

 

Awesome news bc Im having idle issues also and my Z32 MAF is pointing directly down facing the ground. That will be the first thing I try when I get home. If that fixes it I will be one happy SOB.

 

so Im home and when I turn my MAF in the position he has in the pic shown my flange doesnt line up. How exactly is yours sitting? Is the plug pointed at the hood?


Great its starting to rain...ugh.

 

you wont be able to turn the flange holes on the crossover pipe because it is all one piece. stephenmax and matty have changed the piping and have MAF adapters so they can just take it loose and rotate.

when i had the Z32 MAF in i had the wires pointing to the ground and it didnt give me a problem at idle.

 

well I turned it 90 degrees up and it no avail of course. I also unplugged all the coils with the car running and they all seemed to make the car bog once unplugged. I guess Im just plagued I was hoping it was one of the two things but its neither.

 

just a guess, but what about the idle air control valve (i belive that what its called and it controls the idle in some or all cars, i donno if the max has one). I do know however that my brothers vr4 does something very simmilar and he figured out it was the iacv.

 

well I just tried swapping ECU's and guess what? The stock ECU idle pretty d@mn good and the vacumn is right around 18-19hg's. Then I tried the old prog chip which I still have with the SC program, 370cc's and A32 MAF, it idles good again with the same results. The I pop back in the prog that was set for the Z32 MAF and Nismo 615cc injectors and the car starts idling horrible, hg's go to like 10-12 and the car is rough as he11. I guess all I have left to do is call JWT and see what they have to say. Guess this will be fun.

 

my mistake was wiring the plug incorrectly. the end wires needed to be switched to opposite ends.

 

after checking all that stuff, it was a simple mistake.

 

Tell them your story..they need to listen and most likely take back your ECU and test it or reprogram correctly

Im really surprised that just by turning the MAF, it actually fixed the idle problem...It must have something to do with the oscolation of the air against the MAF..I talked to a macanic and he said some MAF's on some cars need to be a certain position..

As for the "stock Stillen piping" you can still twist it, just turn it all the way over to the other side...

EDIT: I spun mine 180 degrees not 90

What do you mean ??

-matt

 

I can't do that bc of the BOV...

Im going to call JWT when they open and talk to them about this. The only other thing I can think to do is get another prog made for Z32 MAF and 370cc injectors and just do the correction using the emanage. Now I have to go blow more money on an injector harness and support tool. Ugh.

 

I don't think mine is a wiring issue considering it runs fine with the Z32 MAF installed using the A32 MAF/370cc injector prog.

 

Hey blu-

Since you have the A32/370 program, why not just run that? Since the Z32 MAF flows 48% more air than the stock injectors and the 370's are 52% larger the A32 ecu/Z MAF combo is close to stock right?

The 610's that you are using are 60% larger than stock, so with the Z32 maf, your A32/370 program, it should be rich, but close. You can scale the difference down with your emanage.

Just a thought
Steve

Matty-sorry to hijack your thread, I should have put this in the other one.

 

Im just worried about the airflow and how its programed with the A32 MAF. The car runs so much better with the A32 ECU and 370cc program idling but Im afraid it might choke it up top or something. The car ran great with the Z32 MAF/615cc program but it just idles like ****. I was not experiencing anything like Ian was except the rough choppy idle. I never got any hesitation or bucking. Im going to call JWT in about an hour and see what they have to say about it.

 

Matt i think slimer is right. I didn't notice you have a emanage. I think you could just enter in the parameter settings 370cc before and 610 after and that should give you a good ball park figure.

If you got the emanage just ditch the JWT and get the emanage maf harness. It sounds like it is more of a hassel than it is worth(IMO)

 

I dont have the emanage hooked up yet, and I would still need to buy the support tool and injector harness to do that with. Basically after talking to JWT I will give them one shot at this to get it right. Since I had my ECU tuned for Nismo 555's and Im not using them, they told me to send them one injector to get flowed and they will reprogram it to exact spec of supadaves injectors. If that doesn't fix it then I will ditch that idea I just dont want to lose the timing control or the extended rev limit. Hopefully this will all be resolved soon, but now I wont be able to make the DC meet on the 16th.

 

the 555 to 610 shouldn't make a difference.

It's less than 10%. If you had an SAFC, that problem could be fixed easily with -10% across the rpm band.

Keep at it Matt and keep us updated.