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When i come to a complete stop my a/c warms up and temperature goes up but when i'm on the rode my vehicle runs great

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Usualy when you stop the motor is at a lower rpm so the compressor for the A/C isnt running at full power, either that or the condensor isnt getting enough air across it while your stoped. Does your car overheat? if so check your radiator fan.

Posted on Jul 01, 2008

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Once warmed up, while giving gas the engine starts stumbling. I rode it for about 5 miles,the bike ran great. But then all the sudden complete loss of power and throttle response. What might be prob.


Fuel starvation possibly due to a vapour lock in the fuel line. Check that the fuel line runs downhill from the tank and is not near anything hot. Also make sure the gas tap is ON and it is working OK and that the vent in the fuel cap is venting OK.

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My Westinghouse freezer has an alarm beep that goes off every now and then and the only way to stop it is to turn off the fridge completely. In the fridge section the temperature panel flashes the...


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My 94 gmc k1500 starts and runs good until it


Being your truck is a 1994, that means it's the OBD I operating or computer system. Now, if you know of someone that has a scanner that can read OBD I that would be great. What you are looking for is a scanner which can read live data as the engine is running, NOT simply a code reader.

You didn't say that the check engine or service engine light was on, but what I suspect is wrong won't "throw a code" so it doesn't matter if the light is on or not.

I highly suspect the coolant temperature sensor, NOT the coolant temperature sender, is bad.

I ran across 2 vehicles back to back that had the same basic symptoms you have described. One was an OBD I system, the other was OBD II. Both vehicles showed during a 'live scan' that the coolant temperature sensor was telling the computer the engine was -40°!!! Yup, MINUS 40°. This caused the engine to be getting fuel dumped into it like it was 40° below 0, even after the engine was warmed up.

The coolant temperature sensor tells the computer that the engine is cold, getting warm, or is completely warmed up.

As the 'puter is getting this info, it adjusts the air/fuel ratio, timing, etc. to make the engine run the most efficient.

The computer can only go by the info being fed by the sensors, oxygen, coolant temp. manifold air pressure, throttle position, etc.

If any of these sensors go bad and start 'lying' to the computer, the 'puter don't know the difference and adjusts according to the info received. Some of the sensors, when bad, WILL throw a code.

The coolant temperature sensor will NOT throw a code but it will cause a poor running vehicle.

Change the sensor. It should cost less than $10.

Hope this helps.

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1 Answer

Temperature gauge goes up then down engine


Sounds like the thermostat is sticking, on warm up on lot of vehicle the gauge goes past normal and when the thermostat opens drops back. If it is going higher than normal, the thermostat is opening late. Needs changing before it stops opening altogether.

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Hi Ronald, take the vehicle for a diagnostic read out. Seems you have a problem with a temperature sensor or the cold start up idle. Regards John

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I changed cam phasers and runs great when cold. When it warms up it stalls at stop lights and gets difficult to restart


have vechicle code scanned bad engine coolant temperature sensor will cause vechicle to stall out and hard to crank when cold.

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1 Answer

1991 f250 4x4 auto, when hot in florida it stops running, why?


Fuel pump fuel pump, one main reason for a vehicle to stop running as it is warm is the fuel pump and the second reason is the most famous of all the ignition module that is on the distributor as it warms up it can the resistance get greater and effects the ability for the vehicle to maintain spark and you stall out, but when cold you can start up, ignition module or fuel pump both are capable of failing when you reach operating temperature

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the temp sensor sounds like it maybe bad and not responding the way it should.they are cheap 10 - 20 dollars and easy to replace.

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1 Answer

Runs poorly while warming up


auto choke controled by the hot water system,sounds like someone has disconnected the pipes somewhere along the line as they were leaking,on or around the carb should be a round thing with two water pipes and inside is a bi-metal strip,which is most likely working but with no water through it or through the inlet manifold to preheat the petrol vapour hence your problem.soloution buy a small engined europen type vehiclelike a kangoo or berlingo and recycle the gas guzzler you have now.

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