Why does my car have no power when AC is on?
It’s pretty common for low to mid range cars lose about of power when AC is turned on. In very Simple terms : It’s consuming some extra power which puts a little extra load on engine , so the engine has to shift some power to AC compressor and hence compensates with power to drive.
How much engine power does AC use?
Car engines lose power and acceleration when the AC is turned on. Furthermore, air conditioners only use about 10–15 HP. If you are cruising on the highway, you engine power used will be greatly reduced by straight, level steady speeds and be in the 20–30 HP range.
Why is there no power to the a / C compressor?
Potential Causes: A/C Compressor, A/C Pressure Sensor F129, A/C Switch, Ambient Temperature Switch F38, Battery Auxiliary Fuse Box, Fan Control Module J293 (and Wiring), Fuse or Lost Throttle Basic Settings Test the Fan Control (FCM) module inputs as follows: 1.
What happens to cylinder pressure when the piston goes down?
As the piston goes down, the cylinder volume increases which reduces the cylinder pressure. When the piston gets to the bottom on the cylinder (BDC) there may only be 100 to 500 psi in the cylinder. Near BDC, the exhaust valve opens, releasing any cylinder pressure which is higher than atmospheric pressure. This is called “blow down”.
Why does my car run when the a / C is on?
As the A/C runs via both belt (for the compressor) and electrical (for the car system), you may see that all or some (even one) of the spark plug leads are flashing. This means that the insulation around the lead has broken down, and the electricity required to run the total power needs of the car with the A/C on will be low.
What happens to the cylinder pressure when you open the throttle?
As you open the throttle, intake cylinder pressure goes up and more air and fuel are ingested and more power is made. Also, the higher the cylinder pressure during the intake stroke, the less work the engine has to do to “suck in” the intake air and fuel.
Why is my 2003 air conditioner not working?
Owners of 2003’s may comment about poor A/C performance after they have pressed the A/C button and see what appears to be the snowflake illuminated on the display. What has actually happened, though, is that they have disabled the operation of the A/C compressor and the snowflake symbol, upon closer inspection, has a slash through it.
What causes an engine to have no power?
Improper sealing of the valves of the engine. The engine’s piston rings may not be sealing correctly. The cylinder head may be loose or the head gasket might be blown or damaged.
How long does a diesel engine run at low power?
To upload images, use the Upload a FIle button found towards the bottom right of the post response box or a new thread. Diesel runs great for 1/2 hour then very low power. Discussion in ‘ Yanmar ‘ started by Cal, May 3, 2010 . This has me baffled.
How long does a ym240 diesel engine run?
I started my YM240 (24 hp diesel) this spring and it runs absolutely fine for about 1/2 hour – plenty of power under load, no smoke, no blowby, everything seems normal. Then, after about 1/2 hour it starts losing power and in a period of about 3-4 minutes it loses so much power that it can’t climb a small grade unless I drop it into 1st gear.