Next week I am going to be helping out a friend. He has a mid 70's Toyota FJ40 with a 4.2L inline 6. He already installed a TBI from a 4.3 V6, '7747 ECU. I don't have the bin number. He was told some changes had been made to the chip to run on the Toy engine. It idles too high and doesn't run that well overall. I will start with reading the chip with my Burn2 and then getting a data log.

I have been reading up on sync/async issues with the V6 bin's and it sounds like a V8 bin is a better starting point? ASDU?

I am looking for suggestions on I6 conversions, what works, what doesn't, etc.

Thanks.