Fitting Slightly Larger Injectors On A Stock Ecu.

[Dose Pipe Sutututu]

Its possible, but unlikely. I actually have managed to convince myself the timing is ok via Nissan consult. It mostly sits on 15 at idle, the reading sometimes flaps about from 0-15, but I tested another r34 and it was doing the same thing so I think its normal. Theres a thread about it I've made on SAU i think.

As for the ecu knowing about the injectors. Your right, it woudlnt. I was wondering that too because I have heard the ECU can adjust timing and duty cycle a certain amount But if the 02 sensor only works at idle, the ECU would have to be going purely of programmed stock maps with all stock parts.

Reading through consult just reads the ignition timings that is on the ignition table, i.e. even if the CAS was dialled in at 30 degrees (just making up shit here) Nissan consult will still read 15.

So best bet is to get a timing gun and get your base timing spot on at 15 degrees BTDC.

There's no freaking way a stock ECU would knock or run lean as bat shit, if your injectors were clogged OR the seals were leaking you'll have a hard time starting the car when warm (from my past experience).

Hope that heaps, a timing gun costs less than new injectors or getting your injectors removed, cleaned, seals replaced and re-installed.. just saying

[vorse]

just wire in an additional injector into cooler piping or some thing. Old school fuel tech.

old school tuner trick to richen up the mix at the top end

Very nice attitude. Hows the view from up there? I actually think I've seen you make similar comments a number of times in the past, but don't quote me on that.

Wanting the car to run right at 7-10 psi i.e mostly stock is not asking for anything special. I don't think its unreasonable to want the stock tune to handle that. I see it done all the time.

In addition, do you realize the kind of people that are now buying skylines, especially r33s gts's? They treat them like absolute crap and they are bought and sold for chips. They are treated as next to worthless. If you should be talking down to anyone, its them, not the people that actually want to take care of them. If I sell it and buy a corolla as you suggest the car will probably end up in a scrap yard.

Yup I've already been advised of this and thats definitively what I'll most likely do. I just wanted to know instead of blowing the money on a clean if I could get a small upgrade at the same time. Thus the reason for this thread.

You don't need to get defensive you're going to hit hurdles when modding your car it is frustrating but all part of it

did you ever resolve your fuel pressure reg issue? did you end up getting an adjustable one ?

as for the 3-4k for a tune a second hand Power fc is 8-900 dollars and a tune anywhere from 600 upwards from what i've seen this would net you decent gains and the car would probably run better then factory

a nistune even less look DVSJEZ up on here from memory he had a nistune and tune deal going for under 2 grand

when we chatted your car had 300k kilometers on it what's the condition of your timing belt like has the car had the major service done on it

clean the injectors and check the CAS if that doesn't resolve it i would seriously consider taking it to a workshop something else is wrong is your AFM in decent condition ?

Have you changed the fuel filter?

[Kane_R32]

not the people that actually want to take care of them.

Please tell me you're not referring to yourself?

You've been advised to do it properly (inj upgrade + tune/remap/ecu), then get all defensive when people tell you that what you're planning to do is going to be half assed at best.

If you can't afford to do it properly, don't do it at all, or do as most people on SAU do, save up until you can afford the mod.

[GTSBoy]

Its possible, but unlikely. I actually have managed to convince myself the timing is ok via Nissan consult. It mostly sits on 15 at idle, the reading sometimes flaps about from 0-15, but I tested another r34 and it was doing the same thing so I think its normal. Theres a thread about it I've made on SAU i think.

As for the ecu knowing about the injectors. Your right, it woudlnt. I was wondering that too because I have heard the ECU can adjust timing and duty cycle a certain amount But if the 02 sensor only works at idle, the ECU would have to be going purely of programmed stock maps with all stock parts.

A little knowledge is dangerous. The ECU only knows what the timing angle is because the CAS goes click and the ECU listens. If you move the CAS relative to the engine position, you move the click relative to the real engine position. The CAS still says click, the ECU still thinks it's at 15° and no-one, including you is any the wiser.

[sonicz]

Johnnylicte, Yup I agree the car should not be running lean. That's why I am looking into injectors. If I am not going to upgrade ecu/inj/remap, I will go clean stockies or fit another stock set.

Vorse and others referring to CAS, I agree. Ideally the timing should be checked properly with a timing gun instead of relying on ECU. You never know the belt coudl be fitted wrong but I highly doubt it. I have also tried 2 CAS, and every other skyline when you fit the CAS dead center they work perfect provided nothing is faulty. Heck I've advanced the cas on another gts-t a fair bit and it still didn't ping. I don't think a small timing issue +- or going to make the car ping like that.

Timing belt looks also fine. Reg is adjustable yea.

Already on Second AFM. AFM is fine.

Please tell me you're not referring to yourself?

You've been advised to do it properly (inj upgrade + tune/remap/ecu), then get all defensive when people tell you that what you're planning to do is going to be half assed at best.

If you can't afford to do it properly, don't do it at all, or do as most people on SAU do, save up until you can afford the mod.

You can call it being defensive if you want, I am simply pointing out how useless it is to make a comment like "sell it and buy a Corrola". Nobody that has bought a skyline, and is bothered to keep it and make it run better is going to read a comment like that and think, by god, hes right. time for a corolla. Most of the time people drive them till they die or even scrap them when running. I see tons of r33s being wrecked for parts because they sell for as little as 3k.

If you guys find comments like that just plain funny then yea, I like humor on forums too. But personally I only found it funny the first few times and Its clearly not aimed at helping anything, its just done for gloating and showmanship.

Wanting a stock car to run right using stock parts is not half arsed. They didn't need a need a inj upgrade/remap/ecu out of the factory to run right, and as I said other skylines don't ping.

What your're saying is along the lines of your fridge light breaks so if you try to replace the bulb you are doing it half arsed. You gotta buy a new fridge.

Its might be something small like inj blocked and not enough fuel. I also have very good coil packs in there with a strong spark they're probably burning the shit out of whatever fuel goes in cos the car goes pretty good for what it is.

Edited May 24, 2013 by sonicz

[scotty nm35]

How did you set up the reg? It could be the source of your issues. Do you have the stock one to put back on?

[sonicz]

Yea I fitted the stocker back. I think the car ran richer for a while but still had pining issues.

The A-FPR is simply set up where the stock one belongs. I have tried turning up the pressure a little, heaps, etc. It helps a little with pinging, but the car doesn't run as well with high pressure and still pings up high.

Anyway thanks for the comments everyone, I think I have enough to go on now. Replacing or cleaning Injectors and checking timing belt is what i'll be doing next.

[scotty nm35]

The pinking (if that's what it actually is) would be caused by timing if you have been screwing with the CAS and not timing it properly. Stick the stock reg on, check timing with a light using the plug lead method, not the wire loop, then look at the injectors.

[Dose Pipe Sutututu]

dude are you in sydney?

reading this post makes me cringe

[Missileman]

You are running the car on 98 octane fuel???

[sonicz]

Yes Sydney. Yes only 98 . Caltex 98 pings the most. Then V power, then BP Ultimate. But it runs like shit on BP, i.e slow.

V power is the best all rounder.

I should have said "whats 98?", Imagine the cascade of replies

[Dose Pipe Sutututu]

PM me, I will look at your car, I'm free Sat arvo

[Missileman]

Had to ask though, never assume anything, especially on interweb forums.

[GTSBoy]

ping = powa!!

[sonicz]

Thanks for the offer John though I'm busy these next few weeks, maybe later on.

Edited May 24, 2013 by sonicz

[mad082]

If the car is pinging at relatively low boost levels then you should be looking for the cause of it rather than a bandaid fix. Out should be running rich. If it isn't then you have a problem.

How have you diagnosed that it is running lean? Have you used a wideband o2 sensor?

I think you need to go back to the start asked diagnose things properly. Get a timing light and check the timing properly. Get a wideband or put the car on a dyno and get the mixtures checked properly. Also check things like exhaust manifold studs and gaskets, because what you think is pinging may be a gasket rattling. Also try changing the fuel filter. It may be blocked, causing it to run lean. Finally, check the intake pipe between the afm and turbo for leaks. Is the bov recirculation hose hooked up to the bov? What about the oil breather hoses? If any if them aren't hooked up properly then you will run lean because it it's sucking in extra air that the ecu doesn't know about.

Finally, you cannot simply put in bigger injectors. The car won't run with a stock ecu. Or if it does, it will run very poorly. It will idle like crap.

[Kane_R32]

My car is leaning out so instead of cleaning out the stock injectors I figure buy another set that is slightly bigger.

Wanting a stock car to run right using stock parts is not half arsed. They didn't need a need a inj upgrade/remap/ecu out of the factory to run right, and as I said other skylines don't ping.

What your're saying is along the lines of your fridge light breaks so if you try to replace the bulb you are doing it half arsed. You gotta buy a new fridge.

You start off by saying you want to run bigger than standard injectors without a ecu upgrade, that IMO is half arsed...

I in no way mentioned replacing stock parts with stock parts was half arsed.

[Ben C34]

he said he has had the cas off and not checked the timing......

This seems like a lost cause.

Good luck dude.