Hey Bill== An a/c takes about 20 horseower to turn the compressor and a 4 cylinder is developing about 30 horsepower idleing so it will slow down and be rough. Sometimes there is a solonoid to help compensate for this but it doesn't help a lot. GoodluckJoe Check your idle air control valve for lack of movement. When you turn on your A/C it puts a load on your engine, the IAC valve compensates for this by increasing the idle. If it's bad or is not being controlled correctly that rough idle you described will occure due to the load on the engine. Regards, Kevin
needs a tune-up and possible carburetor work.
NO. That is to low. If it is a good tight engine it should have at least 150 PSI per cylinder. You can not have any more of difference then 15 LBS per cylinder are the engine will idle rough.
A spark plug is used to ignite the fuel/air mixture inside the cylinder of an internal combustion engine. If the spark plug isn't working, the cylinder won't fire. In a multi-cylinder engine, this will result in rough running and loss of power. In a small, single cylinder engine, this will result in the inability to start the engine.
NO. It should start at about 150 LBS. PER cylinder. And you can't have anymore then a 15 Lb. difference in any cylinder, are the engine will idle rough.
A new engine would have 150 LBS or more per cylinder. A used engine that runs real good and that has plenty of power should have at least 140 LBS. per cylinder. If there is more then a 15 LB. difference in any cylinder then you will have a rough idle and maybe an engine miss at a idle. That means there is an internal engine problem.
The crank sensor sends a signal to control the spark timing to the engine. If the sensor goes bad the engine may run rough or not run at all.
If white smoke is coming out of the exhaust when the engine is warmed up , it sounds like engine coolant is getting into an engine cylinder
you have a cylinder misfire
Not running but complete in rough shape, $2000. Very rough shape, $1000.
Loss of power, missing, rough idle, check engine light,
Have it checked for codes. There will be a misfire code that will let you know what cylinder has the problem.
rough idlingTry cleaning the throttle body with throttle cleaner and tooth brush. Remove the cover first. Soot builds up in this area causing the flap to stick resulting in rough idle. I have cleaned mine to new condition and I still have a rough idle. The dealer told me these motors never idled very smooth in gear.