So over the past few weeks I have been noticing that my car had been breaking up at higher rpms....it wouldnt do it all the do every once in a while.....

Now all of a sudden the car has no power and when you rev it up it has problems.....I have attached a video to see im someone can help...

The car idles perfectly fine and starts up without no issue.....but soon as you give it any gas it falls on its face...

Keep in mind I have been driving the car since April 2014 with no additional modifications except the addition of a JDM 6 spd....ECU

I have 12V mod done...this is required to use TT Denso Fuel Pump

As of now I have replaced the following:

Opened up JDM 6 spd ECU....it is clean inside.....no leaking capacitors or nothing...
25k mile coil packs....
New spark plugs(copeprs)....gapped at .025
New ignitor clips...
Checked and replaced all vacuum lines.....
Checked all intercooler piping and connectors....
Checked all exhaust and downpipe....

 

check your fuel supply ... (pump , filter and regulator ). You are getting very lean when you were revving the car. You be careful. You will damage your engine. Do you have an aftermarket fuel regulator so much so you can check your fuel pressure ?

 

It is all stock Gerry....

I am getting ready to upgrade entire fuel system anyways....but I would like to get the car back to running like stock...before I start tearing into it

 

Also check map sensor

 

How many HP is the stock regulator good to?

Are you staying with stock ECU? If so, buy a spare, send it right out to be rebuilt and when you get it back, do the other. Two perfect ECU's are great peace of mind. I had the seller of mine ship straight to a rebuild shop, than to me for this reason. I read that the damage is not always visible.

Did it change after re setting the ECU, assuming you tried that already. Unplug O2?

On a side note, damn your bay and interior are looking like a new, high end car.....

 

I got another Aristo ECU, MAP sensor, and TPS coming my way....see if that helps.....If it doesnt make any difference it has to be something with the fuel system..

I have another TT Denso pump that I will install to replace my existing one to see if that helps or not....

From what I read usually the stock fuel system is good for up to 500hp...i.e the lines.....

 

if you haven't done so already, I would double check injectors and the fuel filter would be where I'd start. good luck

 

I was expecting it to be MAF/MAP from the description, but that would presumably fall on its face much lower in the rev range. It sure looks like a fueling issue to me, for all the reasons stated previously.

 

Thanks....Yea that is my though but I planned on upgrading everything over winter.....to dual TT denso pumps.....

Rip out old garbage fuel lines....and run -6an feed from each pump to sard fuel rail....and a singel -6an return....

I was planning on running ID725's and MAPECU2

But I wanted to make sure the car was running in good condition before I start upgrading....

 

When I pulled out the old plugs over the weekend they were so fouled up...

Keep in mind these plugs were in for less than 500 miles...

 

dang ... those plugs do not even manifest what your wideband shows .

plugs says that you have an overly rich mixture with all of them having sooty carbon deposits but your wideband says it is very lean whenever you were revving it .

so the condition seems like ... you are rich at idle but at higher RPMs , getting lean. I know based on our phone conversation you did take out the air filter , what was your AFR with and without turbo air filter ? Just wanted to make sure your air filter element hasn't collapsed. And did you ever take out your catback exhaust just to make sure your muffler hasn't collapsed too ?

EDIT : Are those BRK7EIX ? what are they gapped to ? didn't you tell me they are at 0.028" .... Leave them gapped at 0.032"

 

I tried all those tests you mentioned and it made no difference...

Those iridium plugs I did not touch...they were gapped stock at .028...from what I heard from others is that these plugs dont last long in 2jzgte....thats why I switched over to coppers

 

Do any of you guys know the part # for 3 wire o2 sensor for JDM 2jzgte

 

I believe it is Toyota 89465-14050

 

Thanks Gerry....I am not able to get a hit online with that part #

I do believe that Denso 234-3052....is the same thing....