TundraJoe wrote:I had the same problem with my Tundra. It had a Lasar electronic timing processor that went bad over a couple of years. I replaced it with Bendix mag’s and it completely solved the problem. Indeed, check you timing.

Same experience here, I went from Bendix mags to Surefly Electronic Ignition, and all the temps went up considerably at the same fuel flow numbers. It's good because I know the combustion is generating more heat, so it must be a more efficient burn.