Question about 1993 Honda Accord

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Engine runs fine when first started, then engine throttles high then low, high then low

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  • 92 Answers

That sound like the idle sensor which its by the intake out put where it has the air suction

Posted on May 24, 2011

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1989 tracker. hard to start when cold but starts fine when warm.


89 has the old stand alone spark distributor.
the ECU is spark free, (no player here)
so here is the list for this engine 1.3 or 1.6L
the 1.3 has a carb. (last one) and is NOT EFI ,
you never said which engine it has. so ill guess at the 1.6L
This engine will have hard starting for the fooling reasons.
we dont guess at it we just do the tests.
  • Bad fuel.
  • Never tunedup this decade or every 60,000 miles per opr. guide.
  • low engine compression 150 good, if all are very low the cam timing belt slipped., (they all do , ignored) and is 60k service point.
  • CEL dead key on, bad ECU or lamp bad.
  • CEL glowing running, its telling you what is wrong, get the flash codes (DTC's)
  • Too high fuel pressure. (bad regulator in front of TB)
  • ECT bad. the 2 pin engine coolant temp sensor is bad. test it.
  • The injector leaks in the throttle body (look with eyes)
  • You find that adding 5-10% throttle cranking makes it more easy that is a bad, IAC valve, the valve at the base of the throttle body is stuck closed and kills all cold start air supply. making cold starts very hard, unless tricked with right foot. yes?
  • when any gas engine fails to start cold, i check for too much or too little starting fuel. and for very good spark.
  • Good engine, good spark the good fueling, there are tests for each, ASK?

Nov 23, 2013 | 1989 Geo Tracker

1 Answer

1998 mitsubishi galant revs high then low when idling. runs fine but it sounds horrible.


that is your idle air control valve. it is located on the throttle body next to the throttle position sensor

Dec 15, 2012 | 1998 Mitsubishi Galant

2 Answers

High idle then low idle


just do induction / throttle body cleaning - will solve high idle on start up

Nov 12, 2012 | 2002 Chevrolet Impala

4 Answers

'91 oldsmobile cutlass ciera starts and runs fine but dies when driving short distance, restarts and runs fine but dies after another short distance.


Hello! I need the trouble code...The vehicle is an On Board Diagnostic 1 (OBD!)...You can not use a scanner on an OBD1...See drawing below of connector under the steering wheel...Short pins A to B...Turn on the key...Don't start the engine...Light on dash will flash the code ie...4 long blinks...pause... 1 short blink=code 41...each code, if more tan one, will flash 3 times...record the code # and send it to me and I'll fix the problem....codes are all two digit... guru...saailer




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Dec 13, 2011 | 1991 Oldsmobile Cutlass Ciera

1 Answer

Car starts fine but runs at very high idle &


check your TPS sensor
throttle position sensor

Jan 29, 2010 | 1989 Lincoln Town Car

2 Answers

Jaguar xj6 4.0 1990. showing fault code fuel 14, fail 14. what does this code mean ?


2 airflow sensor out of operating range 3 coolant temp sensor out of operating range 4 oxy sensor indicates full rich 5 throttle potentiometer/airflow sensor... (low throttle pot signal with high airflow sensor signal) 6 throttle pot/airflow sensor...... (high throttle pot signal with low airflow sensor signal) 7 throttle pot...idle fuel adjustment failure(idle speed??) 8 intake air temp sensor...open or shorted circuit to sensor 11 Throttle pot at idle: Throttle pot idle trim out of normal range 12 Airflow meter: MAF signal out of range 14 Coolant thermistor: Resistance out of range or static during engine warm up 16 Air thermistor: Resistance out of range 17 Throttle pot: Out of range 18 Throttle pot/Airflow: Low throttle pot signal at high airflow 19 Throttle pot/Airflow: High throttle pot signal at low airflow 22 Fuel pump drive: ECU output to fuel pump relay 23 Fuel supply: Engine running too rich 24 Ignition Drive: ECU output to ignition Amp 26 Air leak: Engine running too lean 29 ECU self check 33 Injector Drive: ECU output to injectors 34 Injector: Looks for Injector dribble 37 EGR Drive: ECU output to EGR switching valve 39 EGR check sensor: EGR not working (normally pipe blocked) 44 Lambda (O2) sensor: Poor mixture control rich or weak (or misfire) 46 Idle speed Control valve: ECU output to Coil AB 47 Idle speed Control valve: ECU output to Coil CD 48 Idle Speed Control Valve: Stepper motor grossly out of position 66 Air pump: ECU output to air pump relay 68 Road speed sensor: Seen speed < 5km/h at high engine airflow 69 Drive/Neutral switch: Seen cranking in "D" or high airflow in "N" 89 Purge Valve drive: ECU output to purge valve
this is all I could find

Nov 09, 2009 | 1990 Jaguar XJ6

1 Answer

98 galant 2.4 engine speed uncontrollable after 1600 rpm


check automatic idle speed motor if equipped.

Jul 07, 2009 | 1998 Mitsubishi Galant

2 Answers

2004 Honda Civic -Code P0122 Throttle Position Sensor Voltage Low


yes, this is the case of a failed throttle body, in which case it needs replaced, the car is getting too much fuel causing the high idle. this needs replaced asap. you could proably find a small independant honda shop that could do the work for less.

May 12, 2009 | 2004 Honda Civic

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