Bog/stutter/no power issue under load

[Joe]

oh i understand what you are saying and just because i THINK its not the maf doesnt mean im not going to try another one haha

only problem is i dont know a redialy available replacement...i think a Z32 is close and i have access to one.

tommrow ive got a big testing load.

CAS, TPS and MAF i have replacements for all 3.

along with inspecting the turbo.

[BigPar]

My car has this problem. Use to be real bad when my timing was off, but for most pasrt is gone once I fixed that. Still occurs, but only when 100% throttle from low rpm (heavy load), and sometimes does it when I do a hard pull and hit rev limiter right when shifting, next gear imediately is not there when pressing the gas and spits and sputters until I just lay off the gas for a second then you can ease back into it and drive it normal. I figured my MAF is just maxing out. I'm hoping to go standalone soon, or trying out an safc and z32 maf to see if it fixes the problem. I've just learned to drive around it. This problem doesn't seem uncommon as I've noticed other people making threads about it past 6-8 months.

[Joe]

unfortunately since this is a racecar i need 100% throttle, all the time haha. im not gonna learn to drive around it. i need my damn car back lol

[BigPar]

I just don't give 100% throttle unless I'm 3500rpm or higher, anything below that I ease into it until 3-3500 and then floor it the rest of the 30%.

[Joe]

i cant do 100% at all.

[BigPar]

stand alone muh freend....stand alone

[Joe]

if i wasnt on the fence for pulling my engine out for something totally different, i would have one on the way.

[Yellow4g63]

Kamin you can buy the Nissan Data scan program that comes with the consult cable. Well if your consult port was wired up when you did the swap. http://www.plmsdevelopments.com/consult_if.shtml It's a very very very very good tool to have if own a nissan.

[Joe]

lets all pretend i dont have a consult and try to troubleshoot this. i have less than 2 weeks to get this thing back to running order and im not waiting a week for a consult to show up from austrailia to tell me my MAF is bad then have to source a maf in 2 days haha.

replaced CAS this morning, no dice.

looking for a MAF. 22680-31u00 A36-608 E60 thats my part number, trying to find info on it.

[Sil240]

This may help you out.Then again you have some mystery tuned ecu so it might not.

http://paulr33.skylinesaustral....html

[Joe]

This may help you out.Then again you have some mystery tuned ecu so it might not.

http://paulr33.skylinesaustral....html

haha christ

i have a 3 wire maf.

the search continues.

[Sil240]

3 wire????

What are the wires on your MAF??RB20 goesPower - Signal Ground - Ground - Signal - Empty

Or vice versa

You probably only have one ground huh?

[Spazz]

this may be kinda dumb, but what about your upper&lower harness? any melted wires that may be grounding? or maybe a loose ground?

[Joe]

colorsblk/wht wht/blu org/blu

its an 80mm maf.

[Darius]

According to the MAF list compiled by paulr33 on SAU, your MAF is a Series 2 RB25DET MAF which makes perfect sense. It is supposed to be three wires.

B/W - 12V PowerW/L - GroundOR/B - Signal

[USMCgetsome]

i think it's gonna come down to timing and bad coils. I'm gonna change my coils around today and see what happens with my spares. I'll keep you update.

[Joe]

According to the MAF list compiled by paulr33 on SAU, your MAF is a Series 2 RB25DET MAF which makes perfect sense. It is supposed to be three wires.

B/W - 12V PowerW/L - GroundOR/B - Signal

ok so then that other link with the pictures is wrong, got it.

i thought a S1 and S2 maf would interchange?

[Joe]

its a miracle, its fixed.

i did 2 things today.

cleaned MAF

replaced fuel filter.

maf wasnt dirty, so im thinking it was the fuel filter. needless to say im relieved and excited now. car is running amazing.

thanks for all the input and suggestions guys. <3

[RB_Dreamin]

the maf cleaning can be short-lived. sometimes it fixes it for a bit, but i'd keep a spare maf around if that really is the issue

[USMCgetsome]

which fuel filter did you use?

[Sil240]

which fuel filter did you use?

You can use the Z32 Fuel filter, thats what I use.You just have to open up the little holder a little.

[Joe]

which fuel filter did you use?

its kinda funny and im thinking this was part of the issue.

i use a Z32, always have. last one i put in was about 2-2.5 years ago. i get them from vatozone because they are cheap and they work haha. well aaaanyway the NEW Z32 TT filter i got was about twice the diameter of the old one...same part number.

[l0nestar]

Good to hear you got it fixed! I was going to suggest inspecting all of your main grounds. You could also check out this consult software. I know you are not interested in this, but I thought I would 'share' it if anyone was interested.

blaZt: http://www.blazt.biz/order/order.php

$130 USD shipped from USA for their 'top end' kit with USB interface cable + Datascan software + Datalog viewer.

I'm ordering it as soon as my harness is done. Interesting that it was your fuel filter!

[BigPar]

its kinda funny and im thinking this was part of the issue.

i use a Z32, always have. last one i put in was about 2-2.5 years ago. i get them from vatozone because they are cheap and they work haha. well aaaanyway the NEW Z32 TT filter i got was about twice the diameter of the old one...same part number.

I've cleaned my maf before and it never really solved my problem. I don't think it would be a fuel filter for me as it did it from the beginning of the swap with brand new autozone fuel filter for Z32. Is there any differences between a N/A and TT fuel filter such as size, or is it the same? Just thinking it might be restrictive or something.

[RB20DETodd]

damn i got to get off my *** and change my fuel filter.

[300Plus]

damn.... didn't think that simple.... I guess we all didn't. And obviously makes perfect since, when boost hits , fuel pressure increases , pushed all the dirt and crap to the top of the filter blocking the gas = Bog. You probably just inspired half of the RB crowd to go buy a new fuel filter lol Z32 TT filter FTW

Series I and II MAFs are not interchangeable but if your ecu is tuned for the Series II MAF then you can go pick up the Maxima MAF like we talked about. you may have gotten just a Z32 fuel filter the first time not the TT one...

Glad I could help.... lol

[GTR Shop]

Pull plugs.. throw away. Replace with BP6ES gapped to 0.65mmCome back and tell me results

[Joe]

well i run bcpr7es' because of the arizona heat in the summer and they are gapped to just about .65 and the issue was still there with brand new plugs.

i already found the solution, check the thread

[USMCgetsome]

word. Good find sir. Same issue and solved mine as well. But i had a q45 fuel filter in and changed to this one. Way bigger. Anyhow, running great.

[Joe]

aaaaand its back.

worked great all day at the qualifier then took a **** during my competition runs. thankfully i got through the runs and got my license but now its junk again.

this is getting frustrating.