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Why does my 1994 prrotoge run fine when the engine is cold but when it heats up it sometimes spits and sputters like there no power especially when you first take off
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Going with power lose. Check the grounds. Main three are from the battery to engine, battery to body, and engine to body. I wold check for codes, even if the light is not on. There could be some pending.
If the check engine light is not on, I doubt there is much you can do. It sounds like one of the engine temp sensors or one of the other sensors. The engine temp sensor and the intake air temp sensor tell the computer what the outside air temp is and the coolant temp which allows the computer to regulate the amount of fuel going thru the injectors. Generally if one of the sensors has failed the check engine light should be on. It could be low fuel pressure too. You may have to have a shop check the sensors with a scanner and the fuel pressure with a gauge.
Sounds to me like your choke is malfunctioning. Take the cover off of your carb when cold and see if the choke (top buttefly valve) is closed. It should be when cold. (you do not say what year truck you have so I am guessing as to the answer)
PUT A SCANNER ON IT AND CHECK THE TEMP READING FOR THE COMPUTER IT IS MORE THAN LIKLY BAD LIKE IF ITS 40 OUTSIDE THE SENSOR IS READING 90 SO IT DOESNT GIVE IT THE EXTRA FUEL IT WOULD NEED WHEN COLD
I have the same problem on my 95 grand cherokee laredo. Sometimes it starts out fine and after about 10 miles it starts spitting and sputtering. Then after a while it seems to clean out and run fine again for a little while. Then other times it starts out spitting and sputtering at the begining. I changed the fuel filter and that was not it. It is a 4.0L 6cyc. Any Ideas?
first ... put a bottle or two of gas line antifreeze in the tank (it sucks up water in the fuel)... if that doesn't sort it out.... your coil pack may be dying
You need to check a service manual on this but it sounds a bunch like a cold-start valve isn't closing once the engine is warm and this would cause an overly rich fuel-air mix that would gag a warm engine.
I don't know if your car is equipped with one or not.
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