my car feels like its missing, I checked the plugs and they are all black. I cleaned them off and they spark but m y car just feels like a cylinder is not firing. and it ran fine with the 240cc injectors. I guess i might have to put them back since they dont work.

 

I'd put the stock injectors back in. If you put larger injectors in without modifying anything to make up for the difference, it will definitely run rich.

Basically what is happening is the larger injectors are being held open too long for their size. Say for instance stock injectors are 100 cc and you hold them open for a minute allowing 100 cc of fuel through. Now, you install 200 cc injectors but still hold them open for a minute. 200 cc of fuel is going through now. Since they're double the size of the stock injectors you have to cut the timing back by half. Run the 200's for 30 seconds and you'll have 100 cc of fuel.

The 370 cc injectors are roughly 54% larger than the 240's and without cutting back the injector timing, whether it be with a piggy back ecu setup or even changing/modifying the MAF, it'll run very rich.

 

ahh thx I guess i will put back my stock ones until I get my 555cc's and z32 maf. that setup should work better according to I30tmiked's writeup

 

plz help! my car still doesnt work. I changed back to stock injectors, and then I ran it and it ran fine, then I turned it off for about 20 min and came back and it was VERY hard to start and the engine was misfiring... and now it wont start again.. so I reset the ecu and now the only code its giving is 0401 air intake temp sensor.. would that small sensor really affect it that much??
any ideas what it might be? plz help!

also is there a certain method to remove and install fuel injectors? for some reason my engine compartment smells like gas. so im thinking mayb e the orings are torn?

 

Air temp Sensor is irrelevant for starting a car (and running the engine for the most part, probably just as "important" as the EGR temp sensor in the sense that the engine will run just fine without it).

When installing NEW injectors you're supposed to wet the o-rings with new engine oil to lubricate them. Putting back the old ones shouldnt really have been a problem. Be sure you didnt crush any of the big grommets where the injectors go into on the lower intake manifold, that would create a nasty vaccum leak... But it would have to be a MASSIVE vaccum leak to prevent the car from starting. So check that out.

GL

 

seems like there isnt a vaccum leak. might be though... which grommets are they exactly? also an update... I got it started, again sounding like an STi.. but also there seems to be a lot of steam and water coming out of the exhaust.. as in huge white clouds of steam and water dripping out the muffler... and I dont have a cat to convert the co3 to co2+h2o so... could someone have put water in my gas? also if you could tell me more about those grommets. that might also be a problem.. there seems to be an on and off vaccum leak.

 

When you install the fuel rail, the injectors fall into these holes on the LIM. The 6 holes should each have a grommet (an extra fat o-ring pretty much) in which it falls into. If it falls in at an angle, it might crush the grommet (this happened to me yrs ago, 2 of them were crushed, but i had no starting problems, just uber lean mix, lol).

Yea that is weird that you're spitting water out the pipe. How long was the car sitting and how humid has the climate been? After the 2 weeks my car was down for the 3.5 swap I was letting out a bunch of steam since the pipes were soacked in condensation from the muggy night when I got it started.

 

Sounds to me like you f'ed up reinstalling the injectors......as it's a tricky thing to do. Retrace your steps, and go slowly.

 

I'd lightly oil the injectors prior to installing in the rail regardless of being new or used... otherwise you could end up with this:

Its a little hard to see but that's fuel sitting in the intake ports... completely hydro locked the engine and turned the oil in the pan into a liquid overnight Luckily no damage... that I know of...

 

wow thats awsome cookson

 

my car has been sitting for a few days. but It hasnt rained, and also i dont know if thar much water should be inside. it was like just steam coming out the back and water was constantly dripping out the back making a puddle and it didnt stop.

also maybe I should redo the install. it seems like I messed up the grommets. also how Do i change the grommets and what do they look like?

 

dude if you dont know what they look like, means you havent seen them, means they might still be good and its something else, lol. Just pull off the fuel rail. Its the BIG rubber o-rings that the injectors fall into as they come into the LIM.

 

ok sounds good. I hope I can find the problem with my car... damn it sucks not being able to drive it... anyone ever had similar problems? if i cant get it fixed ill try and take it to a shop and if the engine is ruined maybe ill think baout vq35 w/ sc swap from there.. hope it doesnt go that far yet tho...

 

Good luck with that, with all the issues you have had with the 3.0 setup do really think your ready to fab up a kit for the 3.5?

 

Torn o-ring or vaccuum leak

 

You've swapped out injectors this many times and you still don't know what they look like?

 

I havent seent the grommets because ive changed the injectors while the rail was on the car...but this time around I will take the rail off...

as for the vq35 swap.. well, I know someone just used the timing equipment from the vq30 and got the plate to fit, but had to get piping made, so I was doing that. if I did the vq35 then I would have someone else install it... but hopefully new orings and seals fixes this

 

damn I think its the orings because unfortunately I have the same situation as in your picture mtcookson. i didnt know they had to be oiled first. so now I will redo them. BUT I will just put in my 555cc's for now and wait for my z32 maf.. so thatll save me the trouble of taking off the manifold again..

 

ok, so I checked and all the orings were cut, so i just decided to install my 555cc's and now my car starts up perfect even with the a32 maf. just wondering what base fuel pressure should be with the 555cc's. and also when I get my z32 maf in, will it fix my hesitation problems during mid boost?( i saw the thread someone else started and I have the same problem). plz let me know thx!