2003 VQ35DE replacement injectors.

[tehmessiah]

Hi all,

I need to replace the injectors on my V35 350gt skyline.

Can anyone recommend a reliable replacement?

The vehicles stock.

 

[Duncan]

Out of interest, how did you come to decide you need new injectors?

Nissan would be a reliable replacement on a stock car but I guess not good pricing

[tehmessiah]

It’s a long story but I have a misfire on cylinder 2 and it’s not the coil pack or plugs which I’ve replaced.

yes ex-Japan OEM is expensive so I’m looking for a reliable alternative that is easier to source.

[Duncan]

And if you move the injector to another cylinder, does the missfire move as well?

In any case, since you have factory ECU you need either factory injectors or aftermarket drop in replacement of the same flow rate. Also you may find it hard to buy single injectors they generally come in a set

[GTSBoy]

And just because it is not coilpacks or spark plugs, does not automatically mean that the injector is faulty. Could be the loom/plug on either of the injector or coilpack. or it could be a broken ringland, valve seat damage, or any of a number of other similarly nasty mechanical problems that can cause misfires.

[tehmessiah]

Well it’s An all day event to switch out the injectors on the V35.

looks like I need to give you the whole story. Get comfortable.

I bought the car off a work colleague who has bad knees and nearly wrote the car off while at the lights cause his knee gave way.

 I’m in Darwin and the humidity is a car killer in so many factions it’s not funny.

since his knee gave way he parked the car and tried to sell it for 2 years at a rediculous price. He only put 1/4 tank with fuel saver in it. I bought it for 4K after it sat for the 2 years not realising how bad it was. I shouldn’t have bought it.

The tank was rusted the fuel pump was ruined. The other fuel level sensor was also buggered. The clutch slave piston was also ruined (probably why he had so many issues with his weak knees).

The battery died and he never ran it for the whole time it was parked in his carport for 2 years. The drivers window also doesn’t work.

Ive replaced the tank, fuel pump, fuel level sensor, spark plugs and the clutch slave piston. I placed an inline fuel filter as extra protect.

I drove it to work for a week and it ran fine until Friday when it had no throttle response. I had auto electricians look at it and read the ecu and test it and they said it was a faulty ecu. I sent the ecu to Injectronics who said it was dead and sent me a replacement for $1300 (ecu, key sensor and key electronics and bcu). After I reinstalled the new ecu ect I still had no accelerator response.

I spoke to a car guy at work and he recommended the only auto electrician he would use in Darwin. He said he flys guys up from Victorian to work on his cars because all of them up here are terrible. Anyway I explained what was wrong and he came to my house and the first thing he did was go straight for the accelerator pedal and replaced a rubber stop that holds the pedal at the correct spot and all of a sudden the accelerator worked again. Downside I had a check engine light and when he read the ecu it said there was a misfire on cylinder 2. He swapped the coil packs from 1 & 2 and it still had the same error on No2.
Injectronics sent me the wiring diagram so I could check continuity from the ecu to the coil packs and it was 100% good. I checked the signal while the engine was running and the coil trigger signal was being sent as well as 12v + and earth. 
 

So I figured the 2 year old fuel that was still in the lines has seized the No2 injector open (no2 spark plug is wet) and it’s too rich for the spark to ignite it. Therefore the injector needs replacing.

unless someone has a better idea of what it is that’s causing the misfire.
 

I figured let’s replace all the injectors with reliable good ones and if that’s doesn’t fix it replace all the coil packs to make sure.

[GTSBoy]

Yes, so, injectors out, onto the cleaning and flow testing rig. Ultrasonic cleaning while pulsing with solvent supplied through them. If they do not recover - then and only then to buy replacements.

[tehmessiah]

45 minutes ago, GTSBoy said:

Yes, so, injectors out, onto the cleaning and flow testing rig. Ultrasonic cleaning while pulsing with solvent supplied through them. If they do not recover - then and only then to buy replacements.

How do you do that at home?

I don’t have a cleaning/testing rig!

or the time to waste trying to do it. I’d rather just spend the money and get better new ones that aren’t a maybe fix.

[GTSBoy]

2 minutes ago, tehmessiah said:

How do you do that at home?

You don't. Injectors come out, go in a bag, into another car, driven to the fuel injection service location of your choice.

[joshuaho96]

2 hours ago, tehmessiah said:

How do you do that at home?

I don’t have a cleaning/testing rig!

or the time to waste trying to do it. I’d rather just spend the money and get better new ones that aren’t a maybe fix.

Generally speaking you mail them out to a specialist who will test all of them and tell you what can be saved and what was beyond fixing. If you cannot be bothered to deal with that you can buy them for a price of ~54 USD per injector from Hitachi which owns Unisia JECS and therefore these should be OEM equivalent: https://www.rockauto.com/en/moreinfo.php?pk=5428377&cc=1431956&pt=6224&jsn=813

If you want to go even cheaper these are supposedly remanufactured used replacements: https://www.injectorplanet.com/products/unisia-jecs-fbjc100-nissan-16600-5l700

[tehmessiah]

Has anyone used these guys before?

https://www.ausautostore.com/products/fuel-injectors-for-nissan-skyline-350gt-v35-vq35de-2001-2007?variant=42204482240661
 

[joshuaho96]

11 hours ago, tehmessiah said:

Has anyone used these guys before?

https://www.ausautostore.com/products/fuel-injectors-for-nissan-skyline-350gt-v35-vq35de-2001-2007?variant=42204482240661
 

VQ35HR and VQ35DE use different injectors. DE calls for a 4 hole EV6ES format injector that flows 306 cc/min manufactured by Unisia JECS. The HR revision calls for a 12 hole Denso EV14 format injector shared with the QR25DE. The link you show is very likely fake R35 injectors which are not a direct fit and will require retuning. Even if you found another 306 cc/min fuel injector that fits the fuel rail and intake keep in mind that you need identical spray pattern and injector latency in order to have proper behavior. If you want to run higher flow injectors for whatever reason real R35 injectors are only sold through Nissan with part number 1660038B0A which are more like 180-250 USD per injector instead of 260 AUD for a set of six. If you have no particular attachment to Denso EV14 style injectors the Bosch 997.1 Turbo injectors are sold under p/n 62379. Bottom line, if your goal is to just get your car running again for the least money as quickly as possible buy the Injector Planet refurbs. If you want to save some extra money ask if you can send in your old injectors and have any of the usable ones applied as credit against the refurbs. It only saves 7 USD per injector but it sounds like you want to minimize cost.

[GTSBoy]

1 hour ago, joshuaho96 said:

if your goal is to just get your car running again for the least money as quickly as possible

Is not the actual answer to that....

22 hours ago, GTSBoy said:

Injectors come out, go in a bag, into another car, driven to the fuel injection service location of your choice.

for cleaning.

[joshuaho96]

57 minutes ago, GTSBoy said:

Is not the actual answer to that....

for cleaning.

That’s what I would do but it sounds like he doesn’t want to send them out for refurb and wait. Either way it does take some time. 

[GTSBoy]

You don't have too send them out. He lives in Darwin. It may not be a big city, but it is a city, and there would have to be at least 3 workshops in town that can do fuel injection servicing, including cleaning injectors. Darwin is a major hub for heavy mining and there would have to be many may places that work on diesel engines of all scales (from road transport all the way up to 2MW Cat stationary engines).

It's not difficult.

[tehmessiah]

Yes Darwin is the major city in NT.

Because of how remote we are everything come with attached Darwin Tax and everything takes longer to get here. There is minimal competition or choice so everyone charges more and does the worst job to get it done. You can’t trust anyone up here and if you find someone you can trust it’s guaranteed they will leave soon.

I got a quote from Yamaha for part for my bike and they quoted me $1k, I got a quote from Adelaide and it was $500 inc postage.

All I want is to get the car running as quick easy and cheap as possible but not a botched Band-Aid fix. I want reliability. Which is why I was thinking aftermarket instead of refurb. Sending them to USA for refurb seems rediculous. But if that’s what it takes!

[joshuaho96]

11 minutes ago, tehmessiah said:

Yes Darwin is the major city in NT.

Because of how remote we are everything come with attached Darwin Tax and everything takes longer to get here. There is minimal competition or choice so everyone charges more and does the worst job to get it done. You can’t trust anyone up here and if you find someone you can trust it’s guaranteed they will leave soon.

I got a quote from Yamaha for part for my bike and they quoted me $1k, I got a quote from Adelaide and it was $500 inc postage.

All I want is to get the car running as quick easy and cheap as possible but not a botched Band-Aid fix. I want reliability. Which is why I was thinking aftermarket instead of refurb. Sending them to USA for refurb seems rediculous. But if that’s what it takes!

When it comes to injectors aftermarket isn't really any better. You just need to find the right injectors for the stock tune. Keep in mind that according to the EPC the Unisia JECS injectors are not necessarily the right injectors for your car, it could be a Bosch injector or something else:

 

[robbo_rb180]

46 minutes ago, tehmessiah said:

Yes Darwin is the major city in NT.

Because of how remote we are everything come with attached Darwin Tax and everything takes longer to get here. There is minimal competition or choice so everyone charges more and does the worst job to get it done. You can’t trust anyone up here and if you find someone you can trust it’s guaranteed they will leave soon.

I got a quote from Yamaha for part for my bike and they quoted me $1k, I got a quote from Adelaide and it was $500 inc postage.

All I want is to get the car running as quick easy and cheap as possible but not a botched Band-Aid fix. I want reliability. Which is why I was thinking aftermarket instead of refurb. Sending them to USA for refurb seems rediculous. But if that’s what it takes!

Theres a few good places here in Qld that can clean and flow your injectors.

Brisbane Fuel Injection
Longboost performance
Golebys Parts

Pretty sure some Cooldrive stores do injector cleaning.

I feel your pain on remote location tax.
Most economical way is to remove injectors and get them cleaned.
Besides that brand new from nissan are the only other option as anything else may require injector and MAF rescale which in NT is not going to happen. 

[GTSBoy]

Why not just call Diesel Injection Service NT in Winnellie and ask what they can do for you?

 

Aaaarrarararararaagh!

[BK]

1 hour ago, tehmessiah said:

Yes Darwin is the major city in NT.

Because of how remote we are everything come with attached Darwin Tax and everything takes longer to get here. There is minimal competition or choice so everyone charges more and does the worst job to get it done. You can’t trust anyone up here and if you find someone you can trust it’s guaranteed they will leave soon.

I got a quote from Yamaha for part for my bike and they quoted me $1k, I got a quote from Adelaide and it was $500 inc postage.

All I want is to get the car running as quick easy and cheap as possible but not a botched Band-Aid fix. I want reliability. Which is why I was thinking aftermarket instead of refurb. Sending them to USA for refurb seems rediculous. But if that’s what it takes!

NT sucks doesnt it, but even in Alice we have a place that does injector cleaning. I usually don't bother though and send to Adelaide as there are heaps of decent places.