Q: Car misses under load

asked by on

My car misses when it is under load.

Hi there. A miss under load indicates a secondary ignition problem. Your ignition system is divided into two components: the primary and secondary. The primary side of the system includes low voltage items including the battery, ignition switch, control module, crankshaft sensor and primary coil windings. The secondary side of the system includes the secondary coil windings, spark plug wires and spark plugs. The control module interrupts current flow through the primary windings of the coil to create the high voltage needed to fire the spark plugs. A problem with the plugs, wires or coil pack will produce a misfire under load and store a diagnostic trouble code in the control module’s memory. A trained technician will use this code as a starting point to diagnose your vehicle. I suggest you have the team at YourMechanic properly fix your vehicle.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Car misses under load

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

Get a quote

What others are asking

Q: Car has been misfiring 2007 Mercury Mountaineer

Hello - first task is to check for problem codes, whether the Check Engine is lit or not. If it is, there should be an indication of which cylinder is misfiring. Misfiring can be ignition related - plugs, coils, timing...

Q: Thumping sound from the right front end when I hit a pothole.

Hey there, thanks for writing in. "Thumping" is often associated with flat spots on tires or tire belt defects but if such were the cause in your case the thumping would be continuous. You are indicating the noise is only...

Q: My Nissan Frontier truck is overheating. The smog technician said it needs a new thermostat. Would you like to take a look, give m

Hello, thank you for writing in. If the overheating is only happening when you are at a stop, then you want to focus on the water pump and the cooling fans first. While the thermostat can cause overheating when it...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.