Need Advise : 4AFE injector upgrade...

[me2kimi]

Dear all sifus out there. I'm planning to upgrade my 4afe injector. But dunno which is suitable injector my the 4afe. please help.

Thanks in advance.

 

[Dayline668]

WHY the upgrade..? turbo charge already..?

 

[me2kimi]

nop, stock 4afe. but feel lack of power. moreover my 4afe head has been PNP...
When driving below 2500 rpm, acceleration is very poor. But after 2500, throttle response quite good. that why I thought to upgrade injector.

 

[TRD.AE92]

nop, stock 4afe. but feel lack of power. moreover my 4afe head has been PNP...
When driving below 2500 rpm, acceleration is very poor. But after 2500, throttle response quite good. that why I thought to upgrade injector.

How about just upgrade the fuel pump and install fuel regulator 1st?

 

[me2kimi]

what fuel pump should i use? did you mean adjustable fuel pressure regulator?

 

[Dayline668]

4AFE is like that de ma... and add more fuel dun mean more power without proper tuning.. y not change the old o2 sensor 1st to restore its optimum A/F ratio. try it out.

 

[TRD.AE92]

what fuel pump should i use? did you mean adjustable fuel pressure regulator?

depend on what fuel pump you want to put... but standard 4AFE not require high power fuel pump.
And yes, I mean that adjustable fuel pressure regulator.

I not sure your situation, but normally before upgrade injector, I will upgrade the fuel regulator 1st, then fuel pump 2nd, then injector last.

 

[FGT]

depend on what fuel pump you want to put... but standard 4AFE not require high power fuel pump.
And yes, I mean that adjustable fuel pressure regulator.

I not sure your situation, but normally before upgrade injector, I will upgrade the fuel regulator 1st, then fuel pump 2nd, then injector last.

I agree with you coz factory injectors with factory setting operate in its optimum capacity, not maximum capacity. Since your engine have been PNP and as u said maybe it needs more fuel, cranking up the fuel feed might do the job, which I think the factory injectors is capable of doing it. Maybe a fuel pump from a bigger car will do the job. No need Walbro laaa, right or not TRD.AE92? Heheh.. but as usual with modding, u'll never know what'll happen until u do it..heheh.. All the best and pls update us after experimenting! :)

 

[me2kimi]

4AFE is like that de ma... and add more fuel dun mean more power without proper tuning.. y not change the old o2 sensor 1st to restore its optimum A/F ratio. try it out.

Change O2 sensor with brand new one ker bro?

depend on what fuel pump you want to put... but standard 4AFE not require high power fuel pump.
And yes, I mean that adjustable fuel pressure regulator.

I not sure your situation, but normally before upgrade injector, I will upgrade the fuel regulator 1st, then fuel pump 2nd, then injector last.

Already installed that AFPR, will test it soon....

 

[cuscostrutbrace]

No need to upgrade injector la...save money go makan-makan...4AFE is like that one...its not designed for power..

I drive stock 4AFE auto for 2 years and dont find anything wrong with it,its a nice engine,enough power for me..of course little power below 2500rpm coz 1.6 is still 1.6,small capacity so torque very little at low end...

If you driving manual,dont lug the engine below 2000rpm with high gear,of course you feel no power...for 4AFE auto,it is just nice at low end,but no high rpm power

Just my opinion only :-)

 

[me2kimi]

Just want to add little more power to my 4AFE bro. I'm not hp hunger.
Anyway, I appreciate all your opinion here.

 

[Dayline668]

Brand new original O2 sensor lo.. When ur O2 sensor spoiled, ur F/C will go up, car no power. When change to new u will get the power bac to original state, not like new engine la cos engine aged ma. But u get the best of both world, restore power n better F/C. No need 2 waste money on other upgrade.. Save money for blacktop, or budget can go silvertop.

 

[t-la]

Just want to add little more power to my 4AFE bro. I'm not hp hunger.
Anyway, I appreciate all your opinion here.

eh, i thought u already 'build' ur engine? if not mistaken u already change the internals.

i dont think changing to bigger cc inj will ad more power.....thats my opinion.

1 more thing, where u at actually?

 

[me2kimi]

Dayline668: I will change that O2 sensor next time.

eh, i thought u already 'build' ur engine? if not mistaken u already change the internals.

i dont think changing to bigger cc inj will ad more power.....thats my opinion.

1 more thing, where u at actually?

Not build la, my 4AFE just been overhaul and at same time did PNP. Not change the internals.
I'm at puchong.

 

[Drag91]

changing the injector doesn't mean more hp or more fuel can cure the problem you are having if changing to bigger injector you will need management to tune back your A/F. Too rich also loss power. Thats what i think.

 

[t-la]

Dayline668: I will change that O2 sensor next time.


Not build la, my 4AFE just been overhaul and at same time did PNP. Not change the internals.
I'm at puchong.

oic...i tot u with trd.ae92 follow his project in mixing af together 4ag...

if u already pnp the cylndr head, why not u go for bigger exhaust header, bigger air intake and a lighter flywheel, i think it should produce a much better response.

 

[me2kimi]

Brand new original O2 sensor lo.. When ur O2 sensor spoiled, ur F/C will go up, car no power. When change to new u will get the power bac to original state, not like new engine la cos engine aged ma. But u get the best of both world, restore power n better F/C. No need 2 waste money on other upgrade.. Save money for blacktop, or budget can go silvertop.

Bro, do you know how much brand new O2 sensor will cost?

 

[FGT]

i read somewhere in these forums brand new costs a few hundred...

 

[Dayline668]

Yea.. its not cheap.. I hav no info about price. Any sifu can giv some info here..?

 

[me2kimi]

I better check my o2 sensor as levin818 post first.