Finally got it running, it was having some idling issues, i managed to take care of those and its idling now at 600rpm. i took a vid on my dumbphone not the best but you get the picture:



Now i need to get this thing driveable, just so i can move out of the storage facility because i dont need it anymore. I have one problem thou my wideband is faulty(damn AEM) so i have no idea what my AFRs are, i can just tell you it smells quite rich.

What is happening is it lags when the accelerator is depressed then when it finally starts to rev it is stumbling and breaking up. I think its my FPR, its the same adjustable one i was using when i was NA. i have a sard one that was suppose to replace the stock+FMU setup on the other turbo car. Anybody else have an idea?

 

so what was the problem

 

im using a 3.5 oil pan, so the CKPS that i use is modified a little so it will get signal from the flywheel, i guess it was off a little so what i did was take it off and took some more material so it would sit closer to the flywheel and positioned it as square as i could and the car has been firing right up ever since.

 

Just make sure the fuel pressure is right, you should be fine with it vs the fmu for just getting the car moved, you don't want to be in boost not knowing the afrs so... Sounds like a maf issue, the stumbling.

 

Anyway i can really check if its the MAF. It seems to be reading fine when i monitor it.

i dont have a dump tube yet so i really cant boost unless i want to melt my radiator and hose

 

 

what are you doing here?

 

Well here is what happens when i rev, this is at 1/4 throttle:

 

what fuel pump you are using ? check the fuel pressure . this is a sign of low fuel pressure .

 

walbro 255. fuel pressure is actually at 42psi and rises to 47psi on those revs. what im wondering is could it possible be too rich? although it wouldnt really make sense for it to be breaking up like that from being too rich

 

Make sure all injectors and coils are working. If the maf checks out fine, check those. If the wideband was working you could narrow down if you were rich or lean on those revs.

 

Ok im back, i had to take a week off from these cars(the last 2 weeks of working on it wore me down) but i atleast want to get this thing revving smoothly and responding properly to the throttle inputs. Currently, i will be taking it to get dyno tuned by the end of the month, latest early october. I have been quoted $636 thats 4hrs at $159 an hr to get this thing tuned, That is IF it is completely untuned and they have to work from sq. 1.

The MAF seems to be working fine, its bouncing between 1.02-1.11Vs at idle(cammed idle). What i have actually noticed is when i go about 1/2 throttle the car just cuts throttle and doesnt do a thing. Its like a fail safe has been activated.

No Word from AEM yet on the wideband.

And smoking header wrap stinks.

 

Sounds like your fuel pressure is too high. I'm only running 27 PSI with a 255 walbro, and 570 injectors. You need a tune file?

 

If you have something i can give a shot plz send it too me.

 

I got a new lap top, and I'll have to down load the file from the EM. What is your E mail?

 

crusher1032006, yahoo

 

Sorry dude, I suck...... It was a crazy week. Good news, I found the software, and the Emange Cable, unforfunately I cant find the serial cable that adapts the Emange Cable to USB. I ordered one yesterday. I'll get it to you sooner or later.

 

lol cool

 

I promise, I havent forgotten about you.

 

I appreciate that from the bottom of my heart......wait, not in public man.

 

DUDE!!! I have been trying for a week to find the new updates and finally connect to the friggen Emanage. You haz mail.

 

ok help.

Got choray's tune on the car, picked up a new ecu(my old one was funny to say the least) and STILL have the same problems.

What is happening is the car enters like a safe mode and everything is cut. im watching the dutycycle on the emanage and it will peak at about 15% then just cut to 0. Can somebody give me a clue to what is happening.

 

Switch out the maf and see what happens.

 

i had another Z32 MAF then sold it.

I'll see if i can find my old one and its pig tail.

 

Anything else i can try or something to double check, i have a feeling its something very small giving me a lot of trouble.

 

Just throw a stock maf on there to test it out, it could just be the maf.

 

What exactly is the problem, can you write it out? I looked at the video but am not sure if your giving her gas or what not (no audio on my end)

Thanks

 

I'll try that tomorrow morning

What exactly is happening is everytime i try and rev the motor, the car stalls and stumbles its way up. and its not small hiccups, its foot down, car almost dies then will start to rev slowly you'll hear a couple of pops then it picks up and after a bout 5 secs of your foot being welded to the floor you are only at 3500rpm.


The only thing i noticed is it revs better when fuel pressure is high(42-44psi).

 

Does it fire up flawlessly and idle properly? Have you checked for any vacuum leaks?

 

are the maf settings correct

 

Fires up everytime, idles perfectly bouncing around between 700-600rpm(once warm that is, i dont have a cold idle). Earlier today i actually pulled my LIM and replaced all the those gaskets just for good measure, they have always worried me, never leaked thou.

 

Its running a Z32 right now, from what i have been told at idle up until the stock A32 maxes out they are pretty much the same. imma try a stock one i have and see if that changes anything tomorrow.

 

Try to disconnect the MAF and stomp on the gas. See if it climbs quick, should stop at 2500rpm and bounce there. Was the car running perfectly before the turbo setup?

If you have fuel pressure while its acting weird then your loosing spark. I think you might want to re look your crank ref sensor (or whichever is on the tranny). It might be good at low speed but at higher speed its loosing resolution and telling the ecu to cut the signal to your coils (I believe that's how it works).

Like mentioned earlier you said you have good fuel pressure so you can take that out of the equation. If you have no vacuum leaks then all is left is spark and although you said you fixed the crank ref issue it might not be entirely fixed.

 

The car ran perfectly before, had the same cold idle issues but always revved all the way through.

Disconnecting the MAF i will give a shot. im not sure if the crank sensor would be the problem. I have already checked its alignment and so forth, it gave me intial starting problems. Here is what i noticed with the problem, the car is completely cutting fuel, the injector dutycycle goes to 0. then starts to climb again, i will see if i can get my friend to take a video of what is happening tomorrow. He has a better camera than i do so it will be easier to see.

 

ok i set FP at about 42psi and lowered my idle a bit and the car is smoothing out, it is still badly breaking up and stumbling when the accelerator is fully depressed. It did rev to the limiter thou.

Something note worthy to mention, im not sure if most of you pick this up but since im using an SSIM, im using VQ35 injectors. IIRC the 3.5s run at a constant FP of 51psi. Could a few answers be in the injectors?

 

AEM sent me back my wideband aswell and it still doesnt work.

 

You are'nt running a Wide band? You might be flooding it anbd dont know it.

 

i havent touched the car in a few weeks, its running a lot better, but with all things considered, its starting up everytime, idling steady and its obviously a tune issue preventing it from revving smoothly, so im going to leave the car alone and take it to be professionally tuned.

That plus this wideband AEM sent me is just ****.

 

So whats the word on your turbo maxima?? Got it running yet?

To be honest when i bought my turbo maxima it would do the same thing and the guy who sold it to me could not figure it out.(he changed the MAF out about 4 times)..He even took it to the Nissan Dealership and they couldnt figure why it would be in limp mode/wouldnt rev past 3k rpm.. So when i got the car it was simple he had the setting wrong on the SAFC...lol So i put in the correct setting and presto the maxima was running in driveable condition aside from running lean/me needing injectors..

So maybe you should stick with something basic and make sure you set your emanage correct for you vehicle??? Good luck and hope you get the beast running!!!

 

I have not read the whole thread....but these two quotes are what I would check too. If you are not aware the Z32 and A32 mafs are set up differently on an S/Vafc. You may already know this but I was not aware of this and it was causing me problems with my 3.5 swap. If your wideband was working it could help you identify this problem because it would read stupid lean if you are running a Z32 maf with the A32 settings.