I have a toyota supra and it is a non-turbo with a turbonetics turbo upgrade converting it to a turbo. My problem- i had an accident and since the accident the car has not run right. There were codes thrown and they were missfire codes, too lean code, oxygen sensor 1 malfunction,and oxygen sensor 1 running slow during testing. I replaced the spark plugs, cause all 6 of them were fouled out, and that fixed the missfires. I also replaced the fuel filter, and both oxygen sensor 1 and oxygen sensor 2 and it did nothing for me. I will start the car and it runs fine at idle,but when i slowly start pushing down the accelerater climbing from 1000 rpm to 1500 rpm it does fine but as soon as I hit 2000 rpm it drops down below 2000 rpm and if i sit there and keep the accelerater at the same place it took to reach 2000 rpm it will repeatidaly drop and go back up and drop below 2000 rpm. If I drive the car it does the same thing, but when I drive it will go over 2000 rpm and drive but it acts like its not getting gas and will slow down and then kick back in and go, but i replaced all fuel related parts, also put in lucus fuel injector cleaner and that didnt work either. I need help, and any you can supply will be greatly appriciated. thank you

after all the parts were replaced did you reset the ecu? did you check for more codes? what mechanically was damaged in the accident? where was the accident damage focused (ie front, side, rear, etc)?

I cleared the codes if thats what you mean by reset the ecu. There are no more codes as far as I know because the check engine light is not on. It was a very minor wreck, it broke my front bumper- I slid off the road only going 50mph(Dark Road)it pushed my intercooler back a little but everything in the engine bay was untouched. Mechanically nothing was damaged where it wouldnt run, I actually drove the car over to JoTech here in dallas. It just started acting up after I got it repainted. Which is where I took it after JoTech- I went tonight and checked my turbo and it was fine-also checked my throttle-body and it worked properly...I'm soo lost!!

it could be a leak with the sidemount itself

Just an idea as I'm no mechanic, but those could all be caused by the air mass meter. Not sure if supra's have these but my 200sx did the same and that was the cause!

Ok this week I replaced all 6 spark plugs, oxygen sensor 1, oxygen sensor 2, oxygen sensor 3, my cat conv. to a high flow cat, changed air filters, checked throttle body, checked turbo, replaced mass air flow meter, put lucus fuel injector cleaner in gas tank, checked for leaks or hoses popped off-NOTHING!!! All the new parts did nothing for me either!!! HELP IS NEEDED!