Stock injectors and ecu with a t-25

[Zippy69]

Ok I hated to start a new thread, but I need answers asap.I've been waiting to get my ecu issues resolved, but I'm tired of waiting.I was wondering what would happen if I switched back to my stock injectors and ecu and ran my car. I'm running stock boost, @7psi, and I am not going to run it hard, But my truck is killing me with the cost of gas.I'm asking this in the event that I can't get my ecu fixed in the next day or so.I just need to know how bad it would be. Please help!

[Florida240sx]

You have an internal or external wastegate? You got a walboro fuel pump correct?You could always keep the wastegate open and you'd be fine. Or retard timing. But without a wideband I don't know what to tell ya. Is another $100 of gas worth $300 of engine blow-up plus all the downtime and labor to swap out?

[Zippy69]

It's an internal wg. Yes on the walbro.How much timing should I take out in order to run a little boost?Oh and I'm spending $130-$180 a week in gas. I figure all that money could have been put to another ecu or a safc and wideband with a tow to a dyno shop and tuning.I'm hoping that Monday will bring a new daughter board and all will be good, but the way my luck has been going on this project, I seriously doubt all will be right. I'm sure I'll have other issues after this. One pita at a time.

[neverlift]

I'm still on stock injectors I run between 6 and 8 psi depending what my IC wants to do lol... base pressure is way up tho, and I removed the stupid fuel lines that are bolted to the manifold, 255 walbro and z filter... ROM TUNED, is only reason I havent blown.

You could also thread the wastegate arm and lengthen it to lower your boost, but spool will be hurt! Also for 7 psi take out 5 or so, dont rev past 6grand so the stock ecu can read the knock sensor or you could unhook the w/g like florida said, I did it for a day when I lost my little clip

[Zippy69]

How long could I run this way safely? I don't plan on hammering it any until I get this whole thing resolved. But I rally need to get this thing going.So I'll pull 5 deg off base timing and try to keep the rpms under 6k and I should be ok for a while?

[WDRacing]

Stock injectors are good for about 5psi. Anything more is playing with fire. So in short it's a bad idea. If you really want to drive the car soon. Install the stock ecu, injectors and use a 8:1 FMU. No need to retard the timing at only 7 psi. The FMU will have you running rich enough.

WD

[jdmnancy]

you can also put the sr20 injectors 370cc way better than stock injectors and im boosting 9-10 psi they make a difference

[sunnys14]

you can also put the sr20 injectors 370cc way better than stock injectors and im boosting 9-10 psi they make a difference

he doesnt have SAFC

[Zippy69]

Thanks for all the info guys ( and lady).If I can find an FMU locally, then I might try that, if not, then I'm not going to waste anymore money on parts. There are a lot of folks running an E-mance tune with ZERO problems and I would like to be one of them.

[neverlift]

idk we have a few guys with rom tunes too I've had some good luck, but some of us have bad luck, you may recall a member named edud1? he couldnt manage to get a decent tune for the life of him. I've done n/a twice and finishing up the kat tune with minimal issue(in the tune area) wait sunny is a girl? sideways smile or hangin wang on nico it is not important man

hey wd speaking of an fmu(not being too familiar with them) how exactly does that work? it increases pressure at an 8psi(or 10:1.12:1,and the tuneable ones) to one pound of boost rate, like at wot and 5psi you new fuel pressure would be 83psi, and at 10psi 93psi to the injectors? or am I off in its use? sorry for the newb question, I've read about them just not too sure.

[WDRacing]

Thats it bro, you nailed it. It's the easiest and best way to run low boost IMO. No ecu crap, no idle problems, no BOV problems...nada. Just install and go, truly the only plug and play fuel management for the 240.

That is until this summer when I come out with my FI setup

[neverlift]

bull**** tell me!!!!!!!!!!!!!!!!!! pm email here I dont care

thats interesting, cause biggamehit is saying something about 45psi being unsafe lol I still have another 20ish psi I can turn up the fuel pressure. woot woot, bigga I'm not talkign ****, just getting conflicting info, and comparing to what I thought and knew. wd what would you say is the max stock injectors can hold then how about the rail? on a walbro and z32 filter, I mean I've hear of people using 12:1 fmu on stock ka with walbro and that would be almost 80psi at 2 pounds of boost my bad about being a guys

[WDRacing]

Before the turbo thing was this big, guys were running the FMU for a full bar off boost.

[Zippy69]

I guess I'm going to have to go the fmu route. Who carries them besides egay?

[WDRacing]

EBay will be the cheapest.

[Zippy69]

If I ran sr injectors, would I still need an fmu? Or would their larger flow and the walbro do the job?

[WDRacing]

What are you controlling the SR injectors with? You can always do a hacked MAF. Works awsome with 370's...

[Zippy69]

Well now you lost me. I was asking if I could use the 370's in lieu of an fmu, as I can probably get some local for cheap, maybe even free. But I have no idea about a hacked maf, so if you could.......thanks

[S13FX]

I dunno what your budget is,

But get the 370cc SR injectors, and you can get a SAFC for about 100 bucks now days.

All you would need now is maybe a friend that would lend you his wide band to tune and you are set friend .

Unless you have funds to invest in a wide band for you self, which in the long run will pay for it self ten fold.

[WDRacing]

You can't use different sized injectors without having a method to control them. Like a ECU tune or SAFCII...

Maybe I just don't understand wtf is going on here.

[Zippy69]

You mentioned a hacked maf with 370cc injectors. I have know clue what you mean by hacked maf. I understand I can't run larger injectors with no way to control them, as this is my whole problem. I have 550cc's and my tuned ecu is not working right. I have checked and re-checked and I'm at a loss as to what to do. I can't spend too much more money on this project and I need it running now. I hit up a local forum with a wtb post, so maybe I'll get lucky.

[S13FX]

You have couple options.

Get the Tuned ECU fixed, if you got ****ed on that. You will need something like a SAFC which you will be able to tune for 550cc injectors with out a problem.

If you do go that route you will need some kind of a wide band like I mentioned in my previous post, from a friend or invest in one.

Here is some more insight.

If you do go stock ecu and SAFC on 7psi timing should be just fine if you tune a bit on the rich side, if you want more boost invest in a BTM.

Either way SAFC is not a bad tool to have period, just to fine tune your tuned ECU in the future.

And actually **** it a Wide band is a must too. I don't care what people say anymore about, oh a dyno shop tuned my car, I got a such and such ECU. I personally will no way in hell ever drive any of my boosted cars with out a freaking wide band.

Unless the car came turbo from factory and I didn't do any upgrades to it.

[WDRacing]

Just put the stock **** back in and get a FMU. It's $100 and you'll be done. I don't see the problem...

[Zippy69]

I have been trying to get the ecu fixed for about two weeks. I'm not even sure if it is the ecu now. He has sent me another ecu and then another daughter board with the same results. I know I have the maf wired correctly, but I don't know how to check and see if it is any good. I had 12volts on the "E" wire on the maf and .3 volts on "B" going to ecu. I just don't know what else to check. Is there any way the emissions crap could cause this problem? I removed most of it. I have an empty plug by the power steering pump that went to emissions, but as far as I can see there is nothing else electrical.

[Florida240sx]

Emissions..lol oyu should see mine..it's somehwere off in a dump lol, because it's all gone. Only way would be a leak at the egr system from the intake mani..You've done a boost leak test correct? I had a leak under my intake mani for vaccum for the injectors. Could even be a cracked vaccum line under there.You have a complete 100% stock ecu? Still got stock mafs? Put those back on right now. Along with stock injectors.Car should run fine. If not then something else is wrong. Don't worry about your compression your still goodish lol.386-747-9982 leave me a voicemail if you need help I'll try to take a break from work and call you back.Agian your injectors aren't leaking correct? You've pulled the whole fuel rail "3 bolts" and then turned the key... make sure engine is not hot or anything flammable close. Only doing it for a second to ensure they are firing correctly.Got a voltmeter right? Start doing voltage drop test.

[Florida240sx]

[Zippy69]

Yeah, I checked injectors by removing fuel rail and all was good.I'm pretty sure my ecu issue is taken care of. But I won't be sure until I can get it to stop smoking and run long enough to set the timing.Oh, is that diagram looking at the back of the plug going in to mafs or at the plug connector?

[artsx13]

if your spending that much on gas, it'd prob be cheaper to rent a gas efficient car, imo