I have found a running RX7 car near my home for sale that I would like to
use the engine out of for my airplane.  The seller told me (via email) that
the car was not running right.  I asked him specifically what the problem
was and he reported the following....

"The engine fluctuates between 1000 and 1500 rpm and will no go over 1500
even with peddle to the floor. It only dose this every once and a while. I
haven't been able to find a cause yet. I have replaced the inline fuel
filter, checked all injectors, compression test, timing, replaced the
thermostat."

I know it could probably be one of several things wrong with the engine or a
component associated with the engine, but with this limited information is
there anything that would indicate an obvious major flaw that should cause
me to reject this engine?

Thanks,
Jeff

What year is it? Is it a turbo? Or NA? If so in both cases it could be
something as simple as a crack in an intake manifold rubber elbow.
A guy gave me an RX7 turbo because no mechanic he could find took the
trouble to take the intake system apart and look for cracks or leaks.

Probably nothing major in the engine.

Paul Lamar ...No rotor no motor.

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