Q: Misfire after installing AC

asked by on January 08, 2017

when we are put on ac some time missing . suzuki sx4 2011

My car has 143800 miles.
My car has an automatic transmission.

Engine is misfiring Inspection $94.99 - $114.99 Get a Quote

Hello. In most cases the AC system should not affect the operation of the engine. If the issues only began after the AC was installed, it may be possible that the issue developed while the AC was being worked on. Perhaps a wire, hose, or sensor was damaged or disturbed during the installation. Misfires can be caused by many things, ranging from issues with the fuel system, to a faulty ignition coil, to a bad engine sensor or wiring. It could also be possible that the additional engine load placed by the installation of the AC has exasperated an already present problem. If the check engine light is on, retrieving the trouble codes will likely shed some light on what the issue could be. As engine misfires can sometimes be difficult to diagnose, if you are unsure, I would recommend having a professional technician, such as one from YourMechanic, visit your location to diagnose what may be causing the issue.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How Does Water Get Into a Car's Ignition System?
Depending on what type of ignition system you have, a conventional older style ignition system with a distributer cap and ignition rotor, or a more updated version on newer vehicles that has a coil per spark plug, there are several...
How Long Does a Car Battery Last?
Whether you drive a vehicle for work or roaming around town running errands, one constant reality is that we all depend on our car's battery to start the vehicle on the roads we travel. However, one of the frequently asked...
I think I ran over a raccoon, what should I do?
If you feel there is any significant changes in the way vehicle handles, then there could be some damage. The only thing to recommend is to have the vehicle looked at just in case the raccoon hit the a/c condenser...
Diagnosed as code P0420
When you get a P0420 code that indicates a failing catalytic converter. Most of the time that is exactly what it is. In some cases, it can also be caused by a bad oxygen sensor. I typically use a computer...
Tranny sliped now drives normal
Check the transmission fluid level (https://www.yourmechanic.com/services/transmission-fluid-service). Proper checking instructions vary vehicle to vehicle but it's usually imprinted on the transmission fluid dipstick. Typical instructions will require you to check it while in Park, hot engine, and on level ground. If...
Whining after new installation of power steering pump
You either have excessive air in the fluid of the system that will gradually work its way out over a few days to a week, or the pump is defective. Try not to hold the steering in a locked position...
Are stabilizers the same as tie rods? I think no??
Hello. The short answer is no. Tie rods (https://www.yourmechanic.com/services/tie-rod-end-replacement) are part of your steering system. They are integral to your cars ability to drive straight and turn. I guess in some sense they contribute to the stability of your car,...
Hey my car is leaking a lot what are some suggestions before i try taking it into a shop
Hi there: It really depends on what type of fluid is leaking and where it's coming from which will determine the corrective course of action. If you're leaking coolant, it could be from a coolant hose, connection or a cooling...
car making a noise could this be wheel bearing?
Yes, based on the timing and the character of the noise that is a pretty good supposition, that the wheel bearing could be damaged. However, you do mention that you have a new tire. Depending on type or quality of...

Related articles

The Check Engine Light Demystified
Your car Check Engine Light can mean many things. The Check Engine Light comes on when there's an electrical or mechanical problem with your car.
Symptoms of a Bad or Failing Timing Chain
Common signs of a faulty timing chain include engine misfires, metal shavings found in the oil, and rattling sounds from the engine while idling.
How Long Does an AC Compressor Relay Last?
Your Your car’s air conditioning system needs to be able to pressurize refrigerant in order to operate. The AC compressor relay is an electronic component that turns your AC compressor off and on. Without it, the compressor will not work,...