A faulty throttle position sensor can cause all kinds of drivability problems on all kinds of different vehicles. However, if I was driving a 1991 Honda Accord and the engine suddenly shut down like somebody turned the key off, the first thig I would do is check for spark at the spark plugs. If there was no spark, I would replace the distributor, since this is what causes this about 90% of the time on those vehicles.
SOURCE: trouble throttling positioning sensor
Use and OBD II scan device to read the value to the throttle position when the throttle is closed, engine off, key on. The value may be between zero and 10 percent, check a like vehicle with the scanner for the exact setting. A call to your Honda service department may give you a quick answer.
SOURCE: 1996 Honda Accord throttle position sensor problem
Replace the TPS sensor and your car will be fine.
SOURCE: Erratic Idle problem in 91 accord
THE DISTRIBUTOR WILL CAUSE THIS PROBLEM IN A HONDA TRY A KNOWN GOOD ONE .
To correct this problem get a can of throttle valve cleaner (it is made by CRC) from the local auto parts store, spray it into the air intake of the engine until you have used about half the can, you will need to hold the idle up while you do this, it will try to stall, after this shut the engine down and disconnect the Negative (-) battery cable for 5 minutes. The intake is now clean, if you continue to have the idle speeds problems you may need to seek the help of a professional.
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