Welp, I finally got around to swapping out my dead vg injector to with a used VE injector..

It works The 92-93-94 VG/VE injectors are identical in size and form to fit the vg fuel rail, also the cc size evidently has nothing to do with the injector because i noticed absolutely no difference in how the car runs now on all 6 cyl., vs before with all 6 vg injectors running.


And as usual some pics

 

 

Nice! Yup I am still running two of those red-top injectors myself and they haven't given me any trouble nor having I had any rich/lean running conditions. Thanks for posting this and the pictures for it as well. Very cool!

 

Here's a video of the finished result.. Along with a celebratory brew

 

Well thanks for giving me the idea to do this If you hadn't come along with the information about ve injectors running fine a vg, i would have never attempted the swap in the first place.

 

Glad I could help! I wonder if whomever replaced the two originals in mine with the red tops knew it would work? Very cool at any rate

 

not to steal the thread but i did the same thing but my injectors had a different clip and i'm starting to beleive a different rail all together cause i had to dremel my middle plate somethin serious. soooo...i'm wondering if its possible (and cost effective) to obtain a different rail (junkyard?) and install the ve injectors which are more reliable injectors anyway? please add your thoughts

my swap
http://forums.maxima.org/3rd-generat...injectors.html

 

Yay, sounds good. Also very good to know, I wish I would have known this before we swapped out my cousins' bad VG injector. I have two rails of perfectly OHMed VE injectors we could have used instead.

 

Drinkin' Bud Ice, eh Wayne?

 

Awesome

 

wayne- did you monitor the cars MPG before the swap and will you watch it after the swap.

A complete set swap, I had little doubt about it working, it's the onesie twosie swaps that I was concerned about. apparently those work fine too. I wonder what the actual differences are that nissan still insists on different part numbers

 

I wonder about this, as well.

 

hmmm.... i kinda wonder if all the red injectors are the same cc`s. My # 4 injector went bad on my VE. My friend had a new KA24DE injector that looked the same. I took a chance and installed it.. no problem whatsoever. Then.. a few mo. later # 6 went out. I used a VQ injector that I ohm d from a junkyard car .. and no problem w/ that till this day. Just curious .. what is the CC of stock injectors ??

 

Well guys, we decided to give the car a little test after we got it back on all 6, so i'm sitting in panama city beach florida at the moment We needed a vacation

The car is getting about 29mpg highway miles after the swap, which is great compared to before on 5 cylinders of course. We never really took this maxima on any trips prior to the injector going bad, so idk about pre dead injector highway miles.

The idle is perfectly smooth, accelaration is smooth and quite powerful, lol we missed how nice this car actually ran prior to the dead injector.

 

Welp, I'm off to the beach.

 

Have fun!

 

VE = VQ injector

 

Yeah but does anyone know whats the CC`s of the stock injectors ???

 

google it.
I googled, and found this
http://forums.maxima.org/3rd-generat...ctor-size.html

 

Bringing back a thread that has to do with injector sizes. I need to do something about my injectors again. The rail that I installed last year has an injector that is misfiring again and besides I'm pretty sure they are from a Z31T, so they are running really rich and killing my idle and MPG. With the misfire I think I'm getting roughly 10 mpg or a little better - definitely not what it should be.

Here is the size difference from another thread:

http://www.zcar.com/forums/read.php?...83#reply_54496

VG30ET = 259cc
VG30E= 178cc

So, I was thinking swap out all my injectors again with used from the JY. I was wondering if I should go with a full set from a newer Max VQ or VE and also switch to the oval connectors or would the larger size (210cc) still give me problems? What do you all think.

 

VQ30DE injector = 259cc

 

maxima VG is 180cc, VE is 259cc... it was enough to give me problems. granted it's better to do all 6 wrong than just 1 wrong, cuz the 02 sensor can kinda adjust as long as all 6 match. if you only have 1 or 2 that are different then the ecu is gonna just take a stab at it, and some cylinders will be lean but others rich.

 

Well, what I got is 6 red square top injectors. They came with a VG-Maxima looking intake manifold I bought off eBay, but the intake inlet was more like 2" rather than 3", and the ad said they were from a turbo engine, so I assume they are from a VG30ET. Now, like I said, I am running rich and at least one injector is sometimes misfiring. For a while the misfire would disappear and only come back occasionally, but now it is more constant. So, I am wondering what is the best remedy besides all new stock injectors ($$$).

 

well... perhaps if you get nistune and use the VG30ET injectors it would be cheaper than all new injectors. with nistune you can change the "cc/min" paramater on the injectors and it'll basically do the math for you to restore stock fuel flow. Plus you can use it to tune the engine better in general to make more power. I would hesistate to use the turbo injectors on a stock ECU tho.

 

What does Nistune run (cost)? And why not use turbo injectors with a stock ECU? I am thinking to turbo my engine later anyway, that's why I want to use larger/later model injectors/connectors.

 

because the stock ecu is expecting 180cc injectors. so it's going to pulse the injectors assuming that they were 180cc even though they are 259cc. Which means you're going to run rich all the time. The o2 sensor can help reduce the richness factor but i'm not sure that the stock ECU has that much adjustibility built into it, to reduce the pulse widths enough to get it back into a good AFR range.

There's nothing wrong with using 259cc injectors on a 3.0 v6, but you need to have an ECU that is calibrated to use them. Some people with big turbo kits use 370cc or bigger injectors. Their ecu's are tuned accordingly tho, so that at idle, and lower loads, the pulses are way shorter than they would be on stock injectors. Also you need to make sure that the are compatible with our ECU resistance-wise.

Nistune is $420AUD plus shipping. Compared to $700 for all new injectors. And honestly Nistune is an upgrade all by itself, even on stock injectors, since you can retune the engine for better MPG and more power.

 

OK. Thanks for all that info. I thought the point of installing Nistune was to control the ECU to adjust to out of stock range injectors, AFR ratios, etc. Do I have to get a different ECU and possibly O2 sensor (wideband) when I install Nistune to make it work right? Also, how do I test for resistance compatibility between injectors and ECU? Thanks.

 

well with the injectors as long as they are the same 10-14ohm type injectors we use, they will work, electrically speaking.

Nistune is a full tuning solution... so no matter what reason you need to modify something about the tune, it will help. So whether it's changing injector size, modifying spark timing, tailoring the map for a turbo or s/c, you can do it. And for all intents and purposes, 259cc injectors ARE out-of-stock-range injectors for a stock ECU. The VE uses different fuel maps in its ECU, because it's designed to run the 259cc size.

 

So you mean I can swap out 2 or 3 VG injectors for 2 or 3 VE injectors?

 

DO YOU EVER EFFING READ?!?!?!

i JUST got done saying that you "can" physically but that it is a stupid stupid idea. VE injectors and VG injectors have a different flow rate. if you put 6 VE injectors on a VG the ecu will kindasorta adapt but still won't run as well as VG injectors did. If you mix and match flowrates on the same engine, you will **** everything up if you leave them on there long enough. So if it's a temp fix, fine, do it at your own risk. But 15k miles later after your engine doesn't run right anymore don't blame us.

for the record... Greeny asked me a few months after he made this thread if I had a set of spare VG injectors, because he wanted to take the VE injector back out of his GXE.

 

In another thread the guys set me straight about doing such a swap. Even the cheapest form to fix it wouldn't be a real fix.

 

yea. i forgot exactly when it was... it was before he disappeared last time. i think it was about this time last year actually. it was after my car already had a full set of VE injectors. basically my mpg went WAY down (about .5mpg per tank, for about 10 tanks in a row) until i was only getting about 20mpg, mostly highway. also my engine started making weird noises and it was using oil for the first time since i have owned the car, perhaps due to the over-rich condition washing oil off the cylinder walls.

i attempted to put a variable potentiometer on the maf signal wire but without a wideband, finding the sweetspot was a shot in the dark. but basically, if the ecu THINKS less air is coming in, it will use less fuel. the thing is... i dunno if the same resistance would work properly at all rpms and airflow levels or if the resistance would have to like, rise with airflow to keep it all in check. that's why i say either just use 180cc injectors, or nistune.

 

That's clear. Thanks.

I think I'll head to the U-Pull-It JY in the next few days and pull a whole rail of later model VG injectors (180cc) and also the connectors. I think the later model oval connectors will be good for when I do go turbo and want to drop in Z32TT injectors or something like that.

One more question I have though is, do you always have to replace both the upper intake manifold gaskets when taking it off to do the injectors? I'm talking about the one in the middle of the collector as well as the one with the six individual holes. Reason I ask is that I can't seem to find the upper collector gasket sold separately out of a set, and the set is expensive ($55-65).

 

last couple times i did it I just used copper permatex rtv i know Matt or Danny would me but it didn't seem to have any leaks when i was done so yea.

 

dealer sells that gasket for about $10.

 

anyways i spoke to a friend of mine on here that has Nistune and he said that there is a parameter where you can just tell it what cc/min injector you are using, and it will recalculate the whole fuel map automatically.

 

Thanks Brian, I forgot about the dealer.

Well, that certainly would be neat. I did go to the yard yesterday and tested various injectors. Unfortunately, the ones I wanted with the oval connectors were not all good. I guess, for now, I will just have to swap out the ones that were bad in my original rail and do a complete swap later when I can afford Nistune and a full set of new larger injectors. At least now I know all the specs and choices available and that it only costs me about $15-$20 in gaskets to remove and replace the upper intake manifold. I should become pretty good and fast at this pretty soon. :-)

 

i actually have a fully functional set of the 259cc injectors w/ new o-rings and hoses in a beautifully painted fuel rail.... unfortunately i still had a stock ECU. but if you get Nistune you can buy the rail I've got and slap it in.

 

Wow, Caped! That looks awesome. That would really brighten up the engine. I'm not sure if I would want to go with 259ccs when I go Nistune or if I would go a bit bigger in hopes of going Turbo after that, but if I do I'll surely let you know. Thanks.

 

Well, another trip to the JY and success! Kind of . I got some other injectors. They are from a VG30E. They are all pink and square with a black dot just like my old ones. They all tested good and are much cleaner and newer looking. I even got them in the rail so I may not have to worry about switching them to my old rail or changing the connectors to the new style. But, they may not work! They are actually from a '95 Pathfinder engine.

There are about 4 or 5 VG Maximas in the yard, but they all seem so old and beat up. I just happened to walk by this Pathfinder on the way in today and it struck me that the injectors looked a lot better from up top and were from the same engine, so why not? Besides, since I had to take the intake manifold off to get to them why not get that too and do what Goon was trying to do with the Pathy intake on a Max for better air flow? But once I got them off I saw that the long pintle caps from Maxima injectors are not there on the ones out of the Pathfinder. Actually the nozzle is recessed up inside a little bit. So, I am wondering, will these work or not? Will the spray pattern just be way too wide and not focused where it needs to be for a Maxima VG engine because of a lack of the lower spray location on these injectors? Is there a way to modify them by adding longer pintle caps? Why would they be so different since the engine is the same essentially? Is it because it's a truck and there is more emphasis on torque instead of horsepower? Who knows?

I may have to go back and get some older single injectors from a Maxima, but I was hoping to avoid swapping them in and out of the fuel rails.