Skip the auto shop - Our mechanics make house calls

Q: When I cut ac on my truck idle goes down two or three times the truck stalls

asked by on

Yeah I had a diagnostic done on the truck and camshaft position sensor came up so I changed it plus the crankshaft position sensor and I ran the truck for about 5 minutes and the problem started again when I cut my AC on the truck stalls I was just wondering what else could be the problem could it be a throttle body position sensor maybe

My car has 200000 miles.
My car has an automatic transmission.

A: The first thing to do is disconnect the A/C...

The first thing to do is disconnect the A/C compressor and then turn on the A/C and see if the engine still stalls. If it still stalls, then you have a problem with idle control circuit and would need further diagnosis. If the engine idle goes up, then connect the A/C compressor so it kicks in and see if it kills the motor, then you may have a compressor locking up and stalling the motor. The A/C pressures will need to be checked and monitored to see if the high pressure goes too high indicating an A/C problem that will need a mechanic to diagnose in person to see what is causing the A/C pressures to be so high. If you need help with this, have a professional, such as one from YourMechanic, inspect your truck's stalling issue and let you know what needs repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: what could it be?

Hello. When you say ignition safety switch I assume you mean the ignition switch. If not then this needs to be replaced first. The ignition switch that is located behind the key lock cylinder is the most common failure to...

Q: Car making loud noise and barely running.

This sounds like it could be a serious problem for your car. My first recommendation would be to have this vehicle inspected by a certified mechanic as soon as possible to avoid these symptoms turning into larger problems. The list...

Q: Oil leak

The most common leak on your particular car is the valve cover gasket. The gasket deteriorates over time and leaks oil over the entire engine. Before replacing the valve cover gasket, I recommend having a qualified technician thoroughly diagnose the leak...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.