Does engine idle at 1000 rpm as soon as the engine is started or it move
from lower RPM to ~ 1000 rpm after after a short driving distrance or
engine idling? If the ECU can not read throttle position unit correctly,
the ECU will lock to higher RPM such as 1000 or 1200 rpm. Typically the
engine should idle around 600 to 800 max. If the condition above describe
your problem than you should have the throttle position unit replace. The
throttle position unit locates on the throttle body assembly below throttle
linkage shaft. It main purpose is to record and report to ECU the shaft
rotation angle (basically your gas pedal position as you press on the
pedal). You may have to remove the throttle unit from the intake housing in
order to access this unit. It is a simple job using simple tools.
Hope this help!
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It goes right up to 1000 and stays there steady as a rock, no fluctuation at
all. I'll check the TPS right away. I suppose that a vacuum leak would make
the idle more irregular - at least occasionally. I know there should be a
tech bulletin about high idle speed on the -95 Riv, but I've never seen it.
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