So i just put a new rebuilt 3fe in my 75 fj40 and it starts and runs like a dream until it warms up. I have tried multiple things to make it work but not success. The motor was in good working order when I pulled it and had it rebuilt. The only difference is I deleted the egr and pump. I have been playing with the vsv valves but nothing seems to work. Any ideas guys.
3fe in my 75fj cruiser runs awesome when cold but runs ruff when warmed up. (6 Viewers)
- Thread starter 75 Cruiser Guy
- Start date
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This forum tech section is for the 2007+ FJ Cruiser, not FJ40s.
Looks nice. Fuel injection works great until it doesn't. Brain boxes work great until they don't. I like my simple carb, with a straight mechanical advance distributor and no brain boxes except behind the wheel. Good luck.
Since it seems to be a temperature issue, maybe one of the temp sensors or switches for the ECU is bad? There instructions in the 3FE supplement for checking that.
pb4ugo
SILVER Star
Welcome to the site. It seems you have a 1975 FJ40, not an fjcruiser.
- Thread starter
- #7
I call it a hiccup not sure if it’s missing or a fuel. I can get on it and it kinda comes out of it. I keep reading it could be the idol control valve but the idol is perfect. When I tested the valve it didn’t activate properly so maybe that’s it. It runs like a Swiss watch when it’s cold.
