Celica Forums General Discussion General check engine light on loss of lift & power

Ok im having a big problem and i was wondering if any one might be able to help me out?

My check engine light keeps coming on and off and every time it comes on i loss my lift and it feels like the car has lost a good amount of power but its weird the light will go off and every thing will be fine for a week or soo then the light comes on and some times ill lose lift and power and some times i wont i really cant explaine it the light will come on usually when im shifting from 2nd to 3rd at about 3k rpm oh its a 2000 gts btw PLEASE help...also i have 1100 miles on the new engine and it has been skroked to a 2.1 i dont know if this makes any diff either

thanks

If you can, get the engine code so we can diagnose that. As far as losing lift while it's on, that's probably because, depending on the code, your car can go into an emergincy state, (or something like that) where it will cut some power to prevent damage.

Look under the TSBs for the GTs. . . "Check Engine Light"
It says something to the effect of a bad ECM or the fuel injectors and to replace with updated parts.

Since the engine has been 'worked over' it could be possible that the O2 sensor is going south, or the catalytic converter. 1st option would be the EFI, though.

lol well almost close took it to toyota and had them pull the codes ( my dealership up here will do it for free but there were 2 codes on it one was the o2 sensor but that was easy it had some oil on it from when the were putting the new engine in but the second was what was causing the problems it was the knock sensor and they tried to tell me it would be 410.00 bucks to get it fixed on an engine with 1100 miles i was like bs and told the service guy were to go i went straight to the warrenty writer in the building and told him what was up and he said the it would be no problem to get it fixed under warrenty i was like yeah right on so know we are just waiting for the part to come in...speaking of that the sensor only had 32k miles on it is it posible that something in the engine isnt alligned right and set it off because i reset my ecu and it came back on was just wondering about that