BlackZenkiS14

I mean, possibly, but I ran the tune for 3 years previously with no issues....

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-Kyle

inopsey

how old are your plugs? i read your original post and you said they are the right color but have you recently/since this started changed them?

Mikester

Your plugs being a brown/bronze color tells me they are cooked... Same color they get after someone drops in some injector cleaner, octane booster etc. I'd change those first... They should be a slight dark grey, light blackish color.

Second of all, when are you going to come to terms with the fact that your ECU is probably the MAIN culprit and you are spinning your wheels throwing parts at it? This was the SAME EXACT problem I had with my 180SX... replaced everything INCLUDING the CAS... Problem magically went away when I pulled the ECU out and replaced it with a shiny new Power FC.

Going back to your plugs, they should not be bronze/brown.

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BlackZenkiS14

Not sure what you mean Mike?

But thanks for the attempted advice, I am working with JWT to figure this out as well. I appreciate you trying to help me from "throwing parts at it", but I'm not just going to "throw a $1k ECU at it" to fix it either. There are TONS of people running this setup, WITH the JWT ECU, and doing very well for a long time. I'll get it figured out eventually.

Plugs are as old as this engine is. Only 1500 miles.

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-Kyle

Mikester

Kyle, I don't think your plugs are THE problem, I said it could be A problem. When you said bronze/brown, that's not what I had envisioned.

If there are tons of people running the very same setup, maybe someone will loan you their ECU... Until then, I hope by working with JWT you mean you sent them back your ECU for indepth testing. No disrespect brother. You know I'm all about helping a dude out. If you've the car at events, then 1500mi might be worth the 30-40 for fresh plugs. My PFC will be back next week, we have very similar setups- you're welcome to try mine.

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Mikester

And by the way, you've been letting this issue kick your ass & expending time & money on it for almost 3mos based on the start date of this thread. If I were you, I'd welcome any 'attempted advice' given at this point. Trying to help man. I'd like to compare slips & I leave in 3-4 weeks.

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BlackZenkiS14

I know you are trying man, and I appreciate that, but just saying "its your ECU, buy a PFC" really isnt a feasible option at this point man.

I dont have $1k to spend on an ECU, and I dont want a PFC that I have to pay someone else to tune for me that lives out of state...

The only money I've spent on this so far is a new CTS ($20), and a new O2 sensor ($50)

I just might try throwing in a set of Iridium plugs and see what happens. I've run iridium plugs my whole life, and this is my first time ever using copper.

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-Kyle

jr_ss

I don't think Mike is blaming the the tune, more so a circuit in the ECU itself.

It's pretty simple to pull the EPROM out and have it swapped to another ecu. I'd start with cracking the case open and seeing if you see any burnt or charred traces.

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My SR20VET

BlackZenkiS14

Looked good to me so far. Also sent these to JWT

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-Kyle

jr_ss

I agree that it does look good. A better picture of the last one would be great. I think I may see something, but then againit could be nothing at all. Regardless, it is very puzzling.

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My SR20VET

BlackZenkiS14

Yea, I didnt realize the last one was blurry until I uploaded it lol

Im going to try to get the car to a dyno today actually and see what that graph looks like also, see if I'm losing power in the powerband also, or just between shifts.

Ben Pila at JWT is working with me and the engineer there looking at my data logs, so hopefully they can come up with something for me.

Just so frustrating, I've missed a lot of events this year, mostly because I've been too busy to work on the car to fix it, but if it was fixed I'd have been able to go.

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-Kyle

Mikester

Kyle- not saying to get a PFC... There are WAY better & more powerful options these days... Just saying that even a 'new to you' ECU with the same JWT tune will probably fix the issue. I know I sound like a broken record- it's only because I had the exact same problem with my 180SX. Is it an E-series ECU (Chuki Blacktop) by default?

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BlackZenkiS14

Yea, we will see what Ben at JWT says. I'm open to anything.

Also, found today that even with the issues, it still makes power....plenty of it! haha

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-Kyle

metako42

I mention this because no-one has bought it up but it could be your injector O-rings leaking fuel into the combustion chambers when they get hot. They might just be holding the seal when cold but give them some heat and they might be not sealing. This would normally give a black plug but you never know. Also have you removed each injector wire in turn whilst idling to work out which cylinder is the culprit? Then swap injectors to see if the problem moves with it.

BlackZenkiS14

I cant imagine that would be the issue, the injectors were rebuilt and flow tested with all o-rings replaced by Witch-Hunter just 1500 miles ago.

Thanks for the idea though!

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-Kyle

BlackZenkiS14

Well, I installed a known-good Z32 MAF and a known-good SR CAS. No change in the issues.

Whats next?

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-Kyle

cotbu

I forgot you're spraying, try shutting off the alcohol mix completely to eliminate the water as a contaminant. Turn it back on after you confirm.

Sent from my Highly Tuned Galaxy S3.4!!!

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LoverTechnologies "Half Broken Things!"

BlackZenkiS14

Will do. But that would be weird for that to be the problem, because its temperature sensitive...and the meth pump/everything is wired in totally separate of the ECU. But I'll give it a shot.

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-Kyle

Mikester

I see your ECU is an E5... Same as my 180's was

Nice numbers bro!!!

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BlackZenkiS14

I am hoping JWT asks me to send the ECU in for check, but at this point they have not asked for it.

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-Kyle

BlackZenkiS14

Well 20+ emails, 12 logs, and 3 months later I finally get this from JWT:

"Our lab engineer says he will make a revised test EPROM with the changes based on your latest logs sent. We will then mail that to you so you can switch it out and see how it runs. "

haha who knows what they think it is, but man it would be sweet if that fixed it!!

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-Kyle

jr_ss

Agreed... Based on all the testing it had to be a hard ware issue.

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My SR20VET

Mikester

Hey Kyle- so I wonder... Isn't EPROM-



IN THE FUCKING ECU????

There went your free pizza!

ImageUploadedByTapatalk1414354964.117706.jpg

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BlackZenkiS14

Thanks Mike, that was very helpful.

I never said there was no way it was in the ECU, I just had to be patient with JWT to get back to me. I couldnt just swap ECU's lol

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-Kyle

Mikester

Just bustin your chops brother. Given your luck, I'm glad JWT is working it- will be stoked to see your car run how it should have all along

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BlackZenkiS14

Yea, I'm curious lol, since I made 419 to the tires with issues

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-Kyle

unometeeter

Coil could be getting hot and breaking up spark, when the engine warms up.

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jr_ss

Few months late to that party...

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My SR20VET

BlackZenkiS14

Still haven't figured this out yet, wondering if anyone else has any input. Car struggled at track day yesterday, frustrating the fuck out of me.

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-Kyle

cotbu

So what did the jwt techs say?
Did they at least send you a new tune to test out?

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LoverTechnologies "Half Broken Things!"