I recently purchased a 2001 is300 with eshift and an aftermarket turbo. The list of modifications that I know that the car has is as follows: tubonetics turbo and wastegate, intercooler, hks ssqv blowoff valve, greddy protec b boost controller, apexi safc, rc injectors, aem fuel regulator, new fuel line and an aftermarket fuel pump. I don't know if there are any other modifications to this vehicle. It is running extremely rich and blowing black smoke after the turbo starts to kick in. I took it to a specialist to have it tuned on a dyno. He was able to get it dialed in... until it reaches about 4000 rpm... then everything goes south. It will be perfect air/ fuel ratio and then the next pull its blowing smoke and running rich again. He said that he is not sure what the problem could be.. he told me to leave it with him for a day or two at $125 dollars an hour and maybe he can find the problem.... If anyone has had a similar problem, please let me know or at least a good place to start... :chairshot:
