92 ACURA VIGOR MYSTERY PROBLEM!!

Have owned this Vigor for 3 years with great luck relative to any
engine problems, etc. Recently, the engine started missing,
backfiring, & just running lousy. The mystery is it runs/purrs like a
cat upon a cold start & continues to run great until the thermostat
opens up; then it starts missing, backfiring, & engine dies then won't
start again until it cools down completely???? I replaced the "engine
coolant sensor" as I found out this sensor tells the ECU to richen the
fuel/air mixture when the engine is cold, then leans it out as it
reaches normal operating temp. When this sensor fails; it is locked in
the cold engine mode which floods the engine after warm-up. Also
changed the plugs and plug wires with no improvement at all!! The
problem still exists & my local independant shop mechanic is scratching
his head too. No "Check Engine" light is on either? Any help is most
appreciated as the closest Acura/Honda dealer is over 100 miles away
from where I live.

"IZAC49" wrote in


> Have owned this Vigor for 3 years with great luck relative to any
> engine problems, etc. Recently, the engine started missing,
> backfiring, & just running lousy. The mystery is it runs/purrs like a
> cat upon a cold start & continues to run great until the thermostat
> opens up; then it starts missing, backfiring, & engine dies then won't
> start again until it cools down completely???? I replaced the "engine
> coolant sensor" as I found out this sensor tells the ECU to richen the
> fuel/air mixture when the engine is cold, then leans it out as it
> reaches normal operating temp. When this sensor fails; it is locked in
> the cold engine mode which floods the engine after warm-up. Also
> changed the plugs and plug wires with no improvement at all!! The
> problem still exists & my local independant shop mechanic is scratching
> his head too. No "Check Engine" light is on either? Any help is most
> appreciated as the closest Acura/Honda dealer is over 100 miles away
> from where I live.
>
>


You sure you replaced the sensor for the ECU, not the one for the dashboard
gauge?

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