Fernando, could you tell us how many hours you have on this engine?
Our engineers in Taiwan still suspect clogged injector(s) is the cause. If possible, please have it disassembled and use a compressor to blast out the gunk, otherwise, if you have it sent back to Kaohsiung, Taiwan, we will take care of it free of charge, except for the return shipping of course.
If you are sending it back to Taiwan, perhaps include your fuel pump and request for option to upgrade, #130 did come with the earlier version of the pump.
Good Luck,
Barry
www.kingtechusa.com