Hi,
I have a Japan imported Toyota Celica TRD 2001. (This is similar to the GTS). Some history about the problem:
I bought it 2nd hand around 6 years ago. It always ran fine but on the first Vehicle-Roadworthy-Test (VRT, not sure what they call it in your country), it failed emissions test. The catalytic converter needed replacement together with a lambda sensor.
2 years later, the lambda sensor was busted again, and changed it in order to pass VRT.
Another 2 years passed and same problem. Changed lambda sensor again, but it wasn't enough as apparently the catalytic converter got busted again! So I took it again to the local Toyota auto dealer and for the past 6 months they've been trying to find out why this is happening.
This is what they've tried so far in these last 6 months
- change catalytic converter with original one together with lambda sensor (minor improvement but not enough)
- cleaned injectors (minor improvement but not enough)
- swapped petrol pump from another TRD (now it starts immediately rather than stuttering but no effect on emissions)
- changed ECU from another TRD and here it gave a false positive. Emissions were back to normal and we thought we had solved the issue. So they took it to VRT the next day, and it failed emissions again because it was running bad again!
- they now tried a new set of injectors (no effect)
- they tried changing the rails (no effect)
Do you have any suggestions on what we could try?
Thanks for your time.