i have just had to replace my EJ22 engine...

the original was a 91' "3plug", the replacement was a 94' "2 plug" because of the wiring differences I first used the inlet and wiring from my 91'. this then had the following problem so i changed the inlet for the 94' and rewired it with my 91' loom...

the problem is...

it idles and ticks over fne but if i press the accelerator with any speed it gets to about 3.5-4k rev and makes a strage induction sort of noise and revs down... almost like hitting a rev limiter but more like starvation of fuel... seems very ecu/computer controlled. There is power under load up to the shut down point.

if you accelerate very very slowly the engine does rev up as normal...

Sorry for the bad explanation.... the original 91' engine was running fine but it needed new rings on number 3 so i found a replacement engine....

are there any differences between the 91' and the 94' EJ22???

i had a speedometer cable come loose after doing some trans work (oops... had a broken clip on the housing), and the gauge itself stopped registering while out on the road... end result was the ECU switching to "limp-home mode" and cutting off fuel at around 3k -- though from what you said, yours isn't staying in the alternate mode. no SES/CEL display when it happens?

problem is it is not in a legacy but a 1968 beetle! hence lack of error lights etc...

wow that's gotta be a fun project!

anyway, your best bet would probably be to try and pull trouble codes, assuming the harness you have still has the OBD connector attached somewhere -- i think you're right about it being ECU controlled, since the computer is designed to cut off the fuel like that under certain conditions, but if so, i don't think there's any way to really pinpoint the problem without knowing what the computer is complaining about.

if it weren't the computer, it could theoretically be the injectors presenting too much inductance to the controller so higher freq/revs would block the signal, but i've never heard of that actually happening in real life. i'm not sure what, if any, mechanical causes would have this effect...

in any case, hope this helps and good luck solving it!

- raynard