Hey guys so I'm having my first problem ever with my 1jz and it's a good one. So here's the rundown the car runs like a top not a single problem idles great pulls hard to the limiter etc. Then the CEL comes on and it all goes to hell, won't idle on it's own for the most part, in any gear other than 1st it's dang near impossible to get about 3-4K under heavy acceleration it just starts breaking up and popping sometimes even backfiring. now heres the weird part if I turn off my fuel pump at idle the car idles like normal with the CEL on soon as I flip it back on if I'm not holding the rpm's up it dies. at idle with the light on i'm getting black smoke out of the pipe. Now here's something interesting too sometimes as I'm driving the light will turn off and the car starts driving normal again until it turns back on. Jumped TE1 to E1 on the ECU and the only code I could get was a 21. I'm being told from numerous sources that the o2 sensor on this car doesn't even matter so it wouldn't cause the problem but thats the only code I get. Also it seems this o2 sensor doesn't exist in tampa. I changed the TPS the caps in the ecu are good my coils are all sealed up I guarantee my spark plugs are black as night right now but like I said as soon as the light goes away it runs like a dream again so I don't think they're fouled out yet. Anyone have any ideas or know any 1jz guys locally that might be willing to let me try their ecu or something like that so I can rule out some things because everyone I talk to is at a loss. Or do you think the o2 sensor does more than I'm being told it does?