Engine running rough

[Slash200]

Hi Guys,

i have a really strange problem with my supra..
Sometimes(that is only sometimes is is the strange thing) runs the engine rough.
I try to explan...
When i'm acceleration the engine runs rough. It feels like something is wrong with the ignition. Its not so rough like running on 5 Cylinders. But when it happening, its vibrating strange and its lacking power
My first thought was its someting wrong with the spark plugs or the cables. I checked them, everything is fine - and if they are broken, the problem would appear everytime.
Ok, then i thought i could maybe the Camshaft Position Sensor.
So i installed a new one and adjustet the timing.
But same problem.
Then i thought the problem comes from the coils. I checked them, and everything fine..
Okay.. then i thought it could maybe the Air flow meter. So i removed it and drive now with Maft Pro with MAP/IAT.
Same problem.
Ok then i thought it could be the Ignitor. So i installed a new one.
And what do you think? Same problem!
I'ts driving me crazy!
Sometimes the engine runs perfect and sometimes the problem appears
And really strange is that the idle is normal.... With 2000 revolutions the problem appears.. rough... what can i do?? :1zhelp::1zhelp::1zhelp::1zhelp:

 

[metaphysico]

I would check your wires again, I know you said you tested them but it is hard to tell a lot of times if the wires are really bad. But for the most part if you have a rough idle its plugs, and if you have rough while under load its wires, now of course there are many things that could cause it too, just giving a start. Also what kinds of plugs and what grade are you running, ie ngk laser platinum or ngk copper or bosch ect.

 

[Slash200]

The cables are new ngk with ngk iridum plugs.