[tonkota]

Originally Posted by Mark W

Sounds like something wrong with your ECU to me. I have taken 3 different 3FEs in FJ62s past 5000 a few times each. I have busted pistons in two different 3FEs taking them up around 5500. I do not push the 3F engines past 5000 any more. I have taken more past 4500. I set the upshift point at about 4500 usually when I adjust the kickdown cable on any 3FEI work on.
I have taken my daily driver FJ80 to about 4800.

Never encountered any sort of electronic rev limiter and I seriously doubt that there is one.

Mark...

What sort of failure in the ECM would cause it to cut out at high RPM? Signal from the distributor?

I'll try to take some video on Friday (since I leave for work when it is dark and get home when it is dark :( .....

[Mark W]

That would be my first thought. It *might* be (one of ) the injector firing circuit? But since they batch fire in sets of 3 I am not sure that this could cause this sort of behavior.


Might also be in the ignition itself, not just the signal to the ECU.

Coil or ignitor failing at high rpm.


Maybe.



Mark...

[tonkota]

OK. Not sure how to check such a thing with out total failure. I'll attempt to take some video of the event when I have some free daylight.

[ntsqd]

Could also be fuel pressure falling off.

Does the 62's ECU have an OBD I port? If so, it may be possible to data log the various sensor signals. I know that it's possible with OBD II, but that is later vintage stuff.

[tonkota]

Originally Posted by pappy

Aaron is correct. Directly from the 1988 Model New Car Features, Land Cruiser, page 138 -

"8b. Fuel Cut-off Due to High Engine Speed. To prevent engine over-run, fuel injection is cut if engine speed rises above 5000rpm. Fuel injection is resumed when the engine speed falls below this value."

From the rod-bolt discussion.

http://www.steelnthings.com/wagontec...ewFeatures.pdf