Sick of killing stock injectors for NO GOOD REASON. Details inside and please recommend a drop in replacement that wont break.

[sonicz]

I have a Early build 1993 R33 Skylline GTS-T.

It is NOW my understanding that there's something different about these early S1 stock injectors that makes them extremely sensitive to modern fuels or additives especially if ethanol is involved in any way. Something about the potting compound used. Makes them ELECTRICALLY fail

I am on my 3RD set and sick of it! They are all perfectly spotless clean but get out of range resistance leading to infinite!

So here's the story

A few times Ive had e10 in my tank either cos my dad filled up and ive told him not to, or I've had to and mixed it with 98. The car ran great on it. It was a rare occurrence.

Now it seems its not the e10 that killed them but rather an addtitive. As a preventative measure, after I STOPPED using ethanol, I added Nulons "e85 performance fuel treatment". A few days later the car developed a miss that got worse and worse until it barely ran and I diagnosed and replaced all 6 injectors with a used pair of stock r33 inejctors.

Car ran great, for a few more weeks until AGIAN it started acting up. SAME thing.

I got a tested and working set of stock injectors. Drained the tank and refilled with 98. Car ran great for 10 months.

Never connecting the e85 fuel treatment to the problem, i added what I had left of it to a quarter tank of petrol. 2 hours later (which was yesterday). THE SAME problem.

The culprit seems to be the "Nulon E85 performance fuel treatment."

https://www.nulon.com.au/products/Fuel_Treatments/E85_Performance_Fuel_Treatment

I drained the tank refilled and the car still barely runs.

I need to replace my injectors AGAIN.

I dont want to pay for a custom ECU and tune, so are there any updated modern injectors that are not as sensitive that are plug and play in a stock R33?

Can I use S2 injectors in an S1?

 

 

 

 

Edited June 25, 2017 by sonicz

[Trex]

Run straight ethanol. 

[sonicz]

Pretty sure you didn't read the OP.

Not running ethanol anymore. It only had very little anyway. Its a stock car with minor upgrades like intercooler coil packs, higher boost etc.

I need to know if any modern injectors that are also 370cc will fit the car, or if S2 injectors will work in an early S1. Because stock S1 injectors have been complete trash to me not paying for another set.

Edited June 25, 2017 by sonicz

[Trex]

I honestly thought you were joking. 

Stop using e85 treatment. Look at the msds, there is a 40% makup of additive that is not used in straight petrol treatment.

Stop using e10.

 

Standard side fed injectors are jecs. Other jecs 370cc may work with your rail etc. s15 ones work for reference etc.

 

[r32-25t]

I thought the obvious answer was don't put the treatment in ever again and you'll never have the issue again 

[Count Grantleyish]

And don't let your dad fill it up let alone drive it ever again.

[admS15]

Your dad needs a good talking to.

[Unkn0wn]

Most Nissan turbos use those 370cc side feed injectors. 

AFAIK s1/s2 fuel injectors are interchangeable.

SR20 turbo motors use same injectors, with the exclusion of the jap s15 motor that has 440cc ones, or 380cc if you believe the hype/run 4 bar base pressure. 

 

TBH i haven't done enough reading into this fault you refer to about the injectors being lower quality, nor heard of it before.

Im pretty sure anyone who touches an ethanol blend on these cars, has changed injectors.

 

if you serious about hating the injectors, perhaps look at replcing them with a newer one....i doubt your going to find any stock sized ones tho.

places like detcaworks do the 550 cc bolt in replacements

but obviously you would need a tune.

[sonicz]

Guys you are making this seem more simple than it is...First of all ive stopped using ethanol. 

 

As for the obvious answer being to stop using the treatment it wasnt so obvious.

The first injectors i thought died due to the ethanol use or old age. But it was likely due to the additive.

The second set died due to using the same fuel in the tank with the treatment in WHICH I HAD NO IDEA CAUSED PROBLEMS 

-The 3rd set just died a few hours after adding the treatment. 

 

IT was only yesterday i suspected the additive. after the 3rd set died.

I am obviously never going yo use it again but i think its important to note

NOWHERE DOES IT SAY THE NULON e85 treatment not suitable for unleaded fuel! 

It also says it cleans and protects injectors valves cylinder walls etc. 

And im still 3 injectors down.and need a 4th set. I dont want to put in another stock set! 

 

Edited June 25, 2017 by sonicz

[sonicz]

Thanks unknown. Im gonna try get a s2 set.

[KiwiRS4T]

Why not? Its not the injectors at fault but the stuff you put in your petrol.

[UWISSH!]

Why would you be using e85 additive stuff if your not running e85?
I'm sure there was an article/ test done a while back that none of those additive things gave any benefit

[GTSBoy]

I am literally having teh tears run down my legs right now.

[sonicz]

Kiwirs4t. Its the injectors fault because they are obviously over sensitive. I find it difficult to beleive a newer car will have such problems with an off the shelf additive.

 

Uwish. Because i had had ethanol in there on the odd occasion, I wanted to protect it from any corossion or water..I was being cautious but as you can see it did harm instead of good.

U guys seem to be missing the point if its designed to help with e85 it should help with any ammount of ethanol. Lucas oil have an additive in America thats similar to the nulon stuff but with with e10 e15 e85 etc. It doesnt matter...

Not to mention it says it does a lot of other things as well.

 

 

[WMDC35]

The s1 & 2 injectors are the same purple side feeds, never had any trouble with e10

[Dose Pipe Sutututu]

How about install modern injectors, with stainless bodies. Then install a Nistune with a Z32 AFM. 

Will probably be more time/cost effective for your issues and also youll have head room for the future once you drop in a bigger turbo

Everyone wins.

[niZmO_Man]

2 hours ago, sonicz said:

Not to mention it says it does a lot of other things as well.

You should contact that company and ask them to replace injectors for you.

[Ty1]

Absolutely Nothing wrong with s1 injectors! If your not chasing bigger power stick with them and get them professionally cleaned and tested...problem solved! And as others have said, never put in e10 or e85...even e85 additives. Ive only ever run 98 in my s1 and never had dramas with injectors. Just throwing it out there but If it keeps happening it may have also affected your fuel pump.

[sonicz]

WMDC35, They are grey on mime not pink.

Nizmo man, no chance they would admit it was their product that caused it.

TY 1, they are not dirty. They were spotless when i took them out. Even opened them up..Spotless. As I said they failed electrically.

 

 

 

[Trex]

So... They failed because of the wiring?