Adjustable fuel regulator

[Rigid]

yo expert and experienced one's...

a question which triggered me after calculating the reality of KW....which end up my car runs to lean at higher rpm when speeding....shit....

so if let say i buy it and intend to install it by my own....how to measure it accurately and maybe if any of u got the idea on the calculations...yeah give me a pop...i sure feel the rest might wanted to know too...

 

[Rigid]

too many ricer

 

[EFN]

For A-FPR Tuning follow this guide:

1. Install Fuel Pressure Gauge between the Fuel Rail and the Fuel Hose from Tank.
2. Crank-Up engine and check current pressure level at idle
3. Then check Wide Open Throttle pressure by disconnecting the Vacuum hose from the FPR
4. Record all the findings and if possible compare them with the Standard spec of the car from car manual (if available)
5. Install an Adjustable Fuel Pressure Regulator unit
6. With the data collected earlier, if you suspect that your car is running lean, diconnect Vacuum hose from the AFPR and adjust the tuning screw to the next available pressure stage (1PSI increase)
7. Test drive your car to see if similar symptoms exist.
8. If still exist, increase another PSI

If after increasing 10PSI and car still run lean, then you might have problem with:
1. Fuel Pump - getting old and weak
2. Injectors - Varnish sediment developed in the passages
3. Fuel Filter - Simple dirty case
4. Fuel Lines - Bent due to impact
5. OEM FPR - Tensioner spring has gone soft

Ultimately, you can send your car for Dyno to get Wide band Air-Fuel-Ratio reading. Only Wide Band AFR can tell exactly at which RPM the lean situation occurs.

Hope this helps.

 

[Rigid]

cool...will definitely keep this as future reference

If after increasing 10PSI and car still run lean, then you might have problem with:
1. Fuel Pump - getting old and weak
2. Injectors - Varnish sediment developed in the passages**
3. Fuel Filter - Simple dirty case
4. Fuel Lines - Bent due to impact
5. OEM FPR - Tensioner spring has gone soft

i really fear with no.2**

 

[masvidal]

anybody knows what is the ideal fuel pressure for stock proton 1.5? currently i set the idle around 32psi and with full throttle it will increase around 40psi.

 

[masvidal]

hello! nobody can confirm this ah?

 

[drexchan]

idling 36psi, full throttle 43psi. Confirmed.

 

[tacira]

anybody knows what is the ideal fuel pressure for stock mivec 1.6?

 

[masvidal]

Originally posted by drexchan@Feb 1 2005, 03:01
idling 36psi, full throttle 43psi. Confirmed.

drexchan, is this set up ideal/good?

 

[EFN]

Each car differs from another even if they are the same model. I have seen 6 different Toyota 4A-GE 20V 1.6L running 6 different Pressure Level even if they belong to the same model. Some are optimized at 28PSI some need 35PSI, not one are the same. What this means is that once you have A-FPR installed, you have the luxury to test out the ranges that suit your car the best. Just need to be a bit active in self-tuning the A-FPR. How to know the best setup, you need to determine first what sort of experience you need. If you require smooth and silky engine response, higher pressure usually helps. For prompt throttle response and nimble acceleration, lower pressure will do the trick - but sometimes can be a bit rough. Still not happy with tuning, just go for a Dyno test and surely the proper setting will be revealed on the sheets.

 

[masvidal]

help!!

why when i adjust around 36psi and when i rev, the engine feel want to go off?

now, lower it to 32psi and then rev, the engine more stable. but once in a while, while driving, feel like the engine go off also.

 

[fzee70]

guys...for RB engine what is the best setting I mean how many psi during idling and hi rev supposed to be. And what should I do if i haven't get the hi rev level. Change or add another fuel pump. Currently the idling setting is 35psi...it's ok and i'm using complete set aeropseed FPR. Your help will be much appreciated....

 

[masvidal]

Originally posted by masvidal@Feb 15 2005, 19:58
help!!

why when i adjust around 36psi and when i rev, the engine feel want to go off?

now, lower it to 32psi and then rev, the engine more stable. but once in a while, while driving, feel like the engine go off also.

wei, mr. drexchan, help me lah about this thing.

 

[drexchan]

how could i help? You must test the setting until you satisfied. Otherwise just swap back to the stock FPR and record down the pressure. Start from that value and plays around with the screw driver.. I do that too.

Just swapped back to stock FPR (coz i will upgrade to the intergrated gauge version). Now i do have the same feeling like you too. Once a while the idling became unstable and seems like want to die-off. Driven down the road. Acceleration was ok but face some jerking during corner (clutch down, down shifting). I also dunno what happen..

Supposingly the stock setting is the best for stability and drivability. Since i am now running without the gauge, i couldn't do anything about it. Will wait for the new version to be installed then i can further test it.

And to make things easier. it's better to makesure that everything works fine.. for example the TB must be clean. The air temperature during the testing is also important. I recon to do it during day time. If the setting works well in hotter temp., i'll work even better in colder condition.

 

[masvidal]

thanks dude. suspect something wrong with the AFR la. today i reset back the ecu. after doing some road test, seem that everything is ok. will test it a few more days.

 

[drexchan]

i heard that your's is leaking right? i think the diaphragm is broken due to rough adjustment..

Have you swapped it back to the stock FPR? how you reset? disconnecting the bat?

 

[masvidal]

Originally posted by drexchan@Feb 26 2005, 19:01
i heard that your's is leaking right? i think the diaphragm is broken due to rough adjustment..

Have you swapped it back to the stock FPR? how you reset? disconnecting the bat?

i still use the same AFR. reset by disconnecting the battery. after that pressure is around 36psi. but after drive it, pressure when down back to 34psi (my original setting). will check again tommorow.

wah, the diaphragm is so sensitive ka? i dont have any idea. i adjust it normally. this fuel in vacuum connection can effect the engine?

 

[drexchan]

Originally posted by masvidal+Feb 27 2005, 00:15 -->

QUOTE (masvidal @ Feb 27 2005, 00:15 )

--QuoteBegin-drexchan

@Feb 26 2005, 19:01 i heard that your's is leaking right? i think the diaphragm is broken due to rough adjustment.. Have you swapped it back to the stock FPR? how you reset? disconnecting the bat?

i still use the same AFR. reset by disconnecting the battery. after that pressure is around 36psi. but after drive it, pressure when down back to 34psi (my original setting). will check again tommorow. wah, the diaphragm is so sensitive ka? i dont have any idea. i adjust it normally. this fuel in vacuum connection can effect the engine? [/b][/quote] You'll be running rich.. it's just like an uncontrolled fifth injector.

 

[taufux]

I'm newbie in this can i know wat is the AFR and FPR tat u guys talking about?

 

[WinDz]

AFR = air fuel ratio
FPR = fuel pressure regulator