Got problem

[NeniNeniBoBo]

Got some problem with my car. When accelerating everything is fine, but if sudden slow down from high speed, my car will stalling. What is the problem...

 

[NISMO S-TUNE]

Any modification done to your ride?

 

[NeniNeniBoBo]

Mod has been done so far:
- intake system
- exhaust system
- fuel system (except injector)
- f con v pro

Recently clutch slipping, waiting for the last item arrive then only fix. This problem not occur at everytime, only once a while.... When pressing gas pedal and the car is speeding, then suddenly release gas pedal and brake(slow down), then the car stall.... Insufficient Fuel supplied? I'm using stock injector and my car is 450hp....

 

[NeniNeniBoBo]

One more thing is, I replaced a new air filter last month without reprogram my ECU.

 

[kaminari]

Previously what air filter you use? After change it, the problem comes out?What BOV u use?

 

[heterodyne]

1)did u do a timing belt change recently?please check the timing, also check the tune.
2)could be a vacuum leak somewhere, check esp the vacuum hoses going to plenum
3)check your throwout/release bearing.
4)check next time accelerate, then quickly release pedal(without braking), if stall(without braking) then its bov.

 

[NeniNeniBoBo]

Previously what air filter you use? After change it, the problem comes out?What BOV u use?

Bro, previously was HKS 3 layer dry type filter, I just change back the same product filter last month without set the ecu, is it ok? Im using Greddy BOV type R now.

---------- Post added 08-17-2010 at 12:00 AM ---------- 6 hour anti-bump limit - Previous post was 08-16-2010 at 11:56 PM ----------

1)did u do a timing belt change recently?please check the timing, also check the tune.
2)could be a vacuum leak somewhere, check esp the vacuum hoses going to plenum
3)check your throwout/release bearing.
4)check next time accelerate, then quickly release pedal(without braking), if stall(without braking) then its bov.

1) I change the timing belt few months ago with other 3 belt together. I tot change timing belt no need retune ecu?
2) Vacuum hose? is it Auxillary Air Control(ACC) valve?
3) Will change my clutch kit soon. Inside is came with the bearing.
3) Okie, will try this next time. But why BOV cause this problem?

 

[owtaman]

Do you want to try service the AAC ?

 

[NISMO S-TUNE]

The following is what you can try as your situation is almost similar to mine:
1) Check your fuel pump.
2) Check your furl regulator.
3) Clean your injectors.
4) Have your tuner re-check your air fuel mapping and setting.

 

[reintel]

bov leak. try tighten it a bit.

 

[NeniNeniBoBo]

Do you want to try service the AAC ?

I think so, is good to service the AAC valve, but I can't ind where is it, I keep finding near the firewall but fail to find.... I think will ask my mechanic help me clean it when I bring my car for install the clutch.

---------- Post added at 12:09 PM ---------- 6 hour anti-bump limit - Previous post was at 11:58 AM ----------

The following is what you can try as your situation is almost similar to mine:
1) Check your fuel pump.
2) Check your furl regulator.
3) Clean your injectors.
4) Have your tuner re-check your air fuel mapping and setting.

1)talk about fuel pump, I'm using walbro 255l, is it good enough if compare with nismo fuel pump in term of "voltage vs flow rate"?

2&3) my fuel regulator changed not more than 1 year ago, anyway I'll check it again. Planning to put in 600cc tomei injector, but before need to confirm 600cc tomei injector fit to which tomei fuel rail(je?? Or denso)

3) yup~

Bro, your problem similar to my case? So this is the few step u did to solve the problem? Have u check your aac valve, bov and vacuum hose?
Correct me if I'm wrong, vacuum hose is the hose connect to actuator?

 

[NeniNeniBoBo]

bov leak. try tighten it a bit.

How to check is the bov leaking?

 

[Dr.D]

do a diagnistics on ur car. last time similiar proble arise from my car , my TPS wasnt connected. ACC valve for rb 26 is underneath the plenum, a prick to open up. each ttime setting the timing belt need to reset idle. need to follow procedure recommened by nissan

 

[NeniNeniBoBo]

do a diagnistics on ur car. last time similiar proble arise from my car , my TPS wasnt connected. ACC valve for rb 26 is underneath the plenum, a prick to open up. each ttime setting the timing belt need to reset idle. need to follow procedure recommened by nissan

Thank you so much bro~

 

[NeniNeniBoBo]

Can I know what is the part number of bnr34 fuel filter, is it same with gtt r34?

 

[reintel]

How to check is the bov leaking?

Normally leaks at high boost. totally depends on luck. Just tighten a bit and se how it goes.

 

[NeniNeniBoBo]

Normally leaks at high boost. totally depends on luck. Just tighten a bit and se how it goes.

Get that, thanks bro~ btw, is bnr34 fuel filter same with gtt34 fuel filter?

 

[NeniNeniBoBo]

Beside of this problem>> "When accelerating everything is fine, but if sudden slow down from high speed, my car will stalling. What is the problem..."

Tonight I drove my car out to refill petrol, I found that my car like very hesitate to move, rev goes up very slow like no power at all, the rev indicator like very heavy, like to stick below 1000rpm.... And I hear the shift gear sound(bov sound) not similar as normal. Normally the sound is from driver side, but now its from passenger side.... Besides that, every morning when I warm up the car, I can hear the sound from rear, mostly from fuel tank, the sound is not same like the usual fuel pump operating sound(when turn on without engine start) but like "duok duok duok duok~"

This week I'll get my clutch line and will go to solve this problem as well, but before that I hope to know what is the possible of causing this happen? I hope can narrow down the faulty area.... Anyone feel free can you give your opinion? Thank you so much for your reply~

My suspect:
- AAC valve dirty
- Vacuum hose leak
- BOV died

 

[owtaman]

Hey if the fuel pump does not sounds right then it probably is the reason of hesitate RPM, do you have a fuel pressure gauge installed with your after market Fuel Pressure Regulator ? Can you recall the suppose fuel pressure ?

Also how old is the fuel filter ? Do you think it might be clogged ?

 

[padi83]

hye.. i'm having kinda prob b4, same the fuel pump sound weird, u can hear it inside ur car.. car oso stalling.. the fuel regulator gauge playing from 2-5.5... try this n try that.. finally only my fuel regulator kaput.. now change to SARD and car back to normal.. just want to share~