Well my car is acting up, feels like its misfiring, I checked plugs, everything was fine, when it starts misfiring the wideband read extremely lean conditions in the 20's and 30's a/f. I removed the injectors and found them like in the picture. Is it common for the plastic on the tip of the injectors to just break off? and also the rings around the lil 4 holes, is that normal. Looks like burn marks. I had fuel pressure pretty high and achieved timing advance, but i guess i maxed out the injectors for too long till they started giving up.

 

Did those tabs break when removing the injectors? or were already broken off?

I have a spare set of DE injectors in their rail, if you didnt want to upgrade to something larger

 

that's interesting. Maybe this is a good time to switch to the DEK LIM since you put in AFPR. The DEK injectors are 290 CC and the DE's are 259 CC @ 3.0 BAR

 

no they were already broken off, when i pulled them out. I already had spare injectors, so thanx.

 

I don't see anything wrong with those injectors externally. The only way to tell how they're really working is to have them flow tested.

 

Oh wait...i think i misread. The tabs were already broken? Hmmmmm...


The first thing that comes to mind is leaking o-rings which were bleeding fuel pressure off and subsequently causing intake backfires which might have broken the tabs.

 

Detonation or preignition? Too much spark advance ?? Did you spray with your new settings, with too much advance ??

I saw injectors from a Mitsi that looked like that, where the fool sprayed a 175-shot at the track without any precautions. Chunks were missing from the ends of his injectors....

 

He never sprayed with the timing advance for obvious reasons. His fuel pressure was acting up so that's why i came up with the theory in my previous post.

 

Well guys, i just finished the damn car lol. I started yesterday at bout 11 ended at 1am. I removed 00vi, all crap thats on it like harness, hoses, etc..... removed the injectors, and took those pictures. then i put in z32 (370) injectors. Then today, I put some silicone on the EGR guidetube hole on the 00vi (to make sure of no leaks), then removed all my nitrous stuff, also all the hoses related to fuel i replaced for some new fresh ones. put 00vi back on, installed everything back. started the car and started like crap! but i guess puddled fuel or just random creatures that might have crawled in the cylinders over night lol. well now the car starts perfect ( i might have soloved my 00vi starting problem), i went for a drive, and air/fuel reads perfect (14.5-15.2). i let the car sit in gear with ebrake for a long time and it never started to hesitate or anything. HOPEFULLY i have solved my problem. but i dont want to put my hopes up yet. im going to give it like 2 days to then confirm its running good.

Grey: I never sprayed with the timing advance (i was too scared lol), also i checked the plugs and they didnt look bad at all, slightly on the lean side but thats cuz of yesterday running a/f at 20's basically no fuel.

Nismology: your phone sucks! buy a damn new one!!!!!!!!! kthnxbye

thanx for the comments ya'll

 

great to hear this is happening. Like you said just pay attention to everything especially now with the advance timing. I'm sure you have the MSD window switch if not, get one for added safety.

 

Good to see the problem solved.

didnt know he was using DEK injectors.

 

Hey, did the harness discovery fix the CEL?

 

so wait, if the injectors were in good condition when u put them in, and now pieces of plastic are missing from them, where did the plastic pieces go....

 

Those were his stock injectors that were never removed before.

 

Havent checked the codes, but so far it seems I got rid of the starting problem--->says streetz

 

werdddddd ...

 

either way, couldnt the plastic pieces go through the engine......? or clog something else up? enlighten me please :grin:

 

if they did, they are plastic and would melt, probably stumble the engine when it happens but I would assume nothing long term. If it was a metal piece that would be a different story.

 

I assumed, but was curious to ask anyway.

 

well my starting problem hasnt been soloved lol. started it cold and just turned off. but thats normal. iv had it like that since i did 00vi swap and im used to it. but other than that the car is perfect =). so i guess it was infact the bad injectors. werd

 

both me and jcy98maxse's car does the same thing... glad you got it all worked out!

 

You still haven't determined that the injectors were bad. There's still another possibility. Remember what we discussed? They only way to REALLY know if they're bad is to have them flow tested (like i said earlier in this thread).

 

Well the car still runs fine with no hesitation or any problem. wether it was o rings or injectors. i gots biggah injectahs now FTW.

 

Well the bottom line is, changing them fixed his motor. So given that, I doubt he's going to want to go through the trouble/ expense of having them flow tested to further prove that they were bad. We're BROKE MAN!

 

Trust me. I'm reminded DAILY of how cheap you ***** are...

 

LOL,

 

Eddy just dont mind nismology, you know he always has to have the last word. Yes fruit boy, you are right. you are the all mighty nismo god

 

ok so im back on this ****. I knew i had to wait a couple days before i made sure everything was ok. I am starting to get hesitation or the feeling of misfire again. i checked my a/f while driving and its all over the place. goes extremly rich in the 8's. or real lean while cruising in the 19's. im going to calibrate my wideband to make sure its not the o2 of the wideband screwing up. while driving the car drives fine. dosnt feel great. but it drives normal i guess. when i stop and put car in either N or park, it starts feeling like misfire BUT this time the rpms dont change at all. You can feel it vibrate a lil bit and hear the exhaust kinda misfire but the rpms dont change. then suddenly the rpms go up to around 900ish and stays there and gets very smooth and no more misfire. this is after a few seconds of stoping and putting it in neutral or park.

I am thinking its something electrical. perhaps for some reason the ecu is going into safe mode or something? then it changes to normal and thats when i notice the rpms go up and smooth out.

Can it be that my stock MAF, does not provide enough good reading for the 370 injectors therefore i might have to get a z32 maf?

 

lol, my car sometimes down that, might be your coils. Which are you using, forgot your VC setup, but did you bolt the coils down or are they just sitting? They need the bolt to complete a good ground to the valve cover.

 

im using my stock 4g coils, they are all bolted down properly. now i went for a drive again and the car is pig rich reading in the 11.5's even at idle. i don kno why the ****. since i got 370(z32) injectors. u think i might need a z32 maf as well?

 

The coils are grounded via the engine control harness just like the injectors and others. I ran my old max without the coils being bolted down for a while with no problems. Ditto my dad's car. Besides, the VC is insulated by it's rubber gasket.