injector problem Options

[pabel89]

hey today i put my 315cc lime green supra injectors also the walbro fuel pump when my mechanic was done with the car i took it for a ride and everytime im doing about 4 to 5000 rpm in any gear the car starts losing power and it starts making tht noise when ur sparks plugs are wet...my mechanic said it can be two thing i need to buy stronger spark plugs oobe suggested the ngk v power...also i didnt put my fuel pressure regulator so i was thinking it might b tht...let me kno what u think??

[jesterwr217]

im running my stock fpr so that may not be it and yes you need better spark plugs and did u have them tested first?

[presure2]

this is the last time i am going to move one of your posts.
if you cant learn to post in the appropriate forum, i will just delete your posts from now on.

you need to tune your car.
do you have a wideband? what are you using for tuning?

i would bet your choking on fuel.

what are you using for plugs now? you should be using 1 step colder than stock, gapped to ~ .028
you not having the FPR in is not the problem.

[pabel89]

yea my car is chocking on fuel when it gets to 4000 rpms...if it isnt the fuel pressure regulator u said it might be the spark plugs?also i have my stock ecu i havent installed the emanage yet can tht b the probelm?

yes i had them tested thier good.

wideband i dnt have it installed yet im getting it installed thursday.

would this damage my engine in anyway?

This post has been edited by pabel89: Dec 29, 2007 - 11:17 PM

[pabel89]

ok i bought some ngk v power plugs...032 gap having them installed now u think this will fix the problem? if it isnt tht im might have to change back to my stock injectors and turbocharge the car with the stock injectors.

[presure2]

ok i bought some ngk v power plugs...032 gap having them installed now u think this will fix the problem? if it isnt tht im might have to change back to my stock injectors and turbocharge the car with the stock injectors.

no, i dont think it will.
you need to TUNE YOUR CAR.
you cant just throw a mish-mash of parts together, with no tuning, and expect it to run properly.
your "mechanic" should know this.
have fun blowing your motor if you keep this up, or turbo your car on stock injectors.

[lagos]

ok i bought some ngk v power plugs...032 gap having them installed now u think this will fix the problem? if it isnt tht im might have to change back to my stock injectors and turbocharge the car with the stock injectors.

Your having someone install your spark plugs for you?

if it isnt tht im might have to change back to my stock injectors and turbocharge the car with the stock injectors.

Great way to blow your motor.

[macavely]

if i was u i would not be driving that car with out have a proper tune done. Adding FI with out tuning is not smart. As all the FI guys in here will tell you..

can i ask just so we know what knowledge level you are at when it comes to FI .. How much resarche did you do before starting this project, What parts did you have? are you doing any of the work yourself?

[pabel89]

i installed my new spark plugs my old one were done they were burn also i went to my mecahnic and he put it on the computer the injectors are done they dnt work thts why it was choking...so im buying new injectors before installing my turbo...yes i have done research on how to turbo charge my 7afe alot of research i have all my parts everything i need to turbocharge my 7afe safely...and im 17 so idnt have tht much exprience in cars but going to ITT tech so yes i have some exprience on car and learning more...i love my celica and tht last thing i wanna do is blow up my engine im a go tune my car on wendsday with the holidays and everything nothing open. some parts im installing my self like the turbo oil feed line, oil return line, intercooler, simple stuff right now all the car has is the walbro fuel pump and the injectors, wendsday im have to go tune it thursday im having the downpipe installed the gauges, turbo pressure sensor...i wanna do this right so ill apreciate if u guy help me cuz u guys have wayy more knowledge on car then me tht why i register to this website.

[LewFX]

didnt you get your injectors tested and cleaned?

[pabel89]

i got them clean i didnt get them tested though but they run fine till i get to high rpms the car just chokes i doubt is the injectors but the the last possible reason i tried everything.

[macavely]

so from your last post I see it like this.. You have bigger injectors installed? but not the turbo yet? or did I miss read your post ?

[presure2]

ill say it one last time, then im closing this thread.
YOU NEED TO TUNE YOUR CAR, YOU ARE CHOKING ON FUEL.

[trd94]

yeah bigger injectors no boost = car chocking on fuel, wont hurt to much other than the spark plugs ... maybe the cat and o2 sensors, you cant just add one peice at a time when you turbo it it is all or nothing . no fuel ,then turbo, then downpipe, it needs to be all at once and then you need to TUNE IT after you install everything.

[6strngs]

yeah, if you're running bigger injectors on the stock ECU, the ECU doesn't know that they are bigger and thus sends out the same length pulses to the injectors, even though smaller ones are now needed because more fuel comes out in the same amount of time with bigger injectors. For low throttle cruising you'll be fine, since the ECU looks at the o2 sensor and will see that you are running rich and lean it out as much as it can, but under WOT the ECU does not look at the o2 sensor at all and you will run very rich and have way too much fuel and sputter and choke at high rpms. you need to either tune the car, which would waste money because you are going to need to tune it again after the turbo is on, put your stock injectors back in until you put the turbo on (this would be the best idea), or stay under 80% throttle at all circuimstances. it has nothing to do with the spark plugs although you do need the step colder ones but they should be installed at the same time as the turbo!

[Batman722]

[LewFX]

This post has been edited by LewFX: Dec 31, 2007 - 1:09 PM