Q: Car misses under load

asked by on February 06, 2016

My car misses when it is under load.

Check Engine Light is on Inspection $79.99 - $89.99 Get a Quote

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.

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

What others are asking

Why does my VSA, engine light and a quotation mark in a triangle mean, also why doed my car shake and then stop

Hello, thank you for writing in. The vehicle is warning you that there is an issue with the Vehicle Stability Assist. This means that the ABS system, wheel speed sensors, and the various other inputs for the VSA system will...

blown engine

Unless there is a contributing factor in the failure, such as a deteriorated hose or hose clamp failure, the person who improperly connected the radiator hose is the only person responsible for repairing or replacing the engine. They may do...

I have an 04 Chrysler Sebring convertible with 2.4 liter engine. What size caliber bolts do I have on my front brakes?

Hi there. The caliper bolts that are on your vehicle are an 8 mm Allen head design, which can be removed with an 8 mm socket on a 3/8 or 1/2 drive socket drive set. If you need further assistance...

i need to find out how much to replace a subframe on my vehicle

Hi there. Unfortunately, our mobile mechanics only complete basic repairs and service on most cars, trucks and SUV's in the United States. A sub frame replacement is something best completed by a body shop or professional repair facility. Thanks for...

Water pump problem

The water pumps leaking coolant is a common failure; the pump would need to be replaced to fix the problem. I recommend that you have a mechanic, such as one from YourMechanic, come to you and do a water pump...

Where's vehicle speed sensor B ?

Hello, thanks for writing in about your Hyundai Azera. There isn't a certain answer for the sensor B. Here is the basic diagnostic route of trouble code P2159 to help you better understand the issue. If you'd like assistance with...

Problem with replacing the TPS

Your throttle position sensor says it is on the throttle body assembly. Look at the gas pedal position sensor, above the gas pedal, to see if this is the sensor the parts store gave you. This sensor is called the...

Car is vibrating and making a clicking noise; should I replace the CV joints?

If you are hearing a clicking noise, this may very well be related to the CV joints. Generally, when it gets to this point, the CV joint has already completely failed and will need to be replaced. In severe cases,...

Just rebuilt the transmission and after picking up the car it's making a vibration . 2006 Acura TL

Hi there - a key question in resolving a vibration issue is "Is the vibration related to vehicle speed, or engine speed?". If the vibration comes from the engine, even if the car is not moving, there could be a...

Related articles

Chrysler Certified Pre-Owned (CPO) Car Program
If If you are shopping for a used Chrysler vehicle, you may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on to...
How Can Problems with the Ignition System Cause Misfiring?
Misfires Misfires are never good, and they're always a sign that there’s a problem with the engine that needs to be repaired. The problem won’t “go away on its own” and waiting too long can cause the situation to grow...
How to Customize a Chrysler 300
The The Chrysler 300 is an extremely popular model of sedan with sleek styling reminiscent of more expensive brands like the Bentley at a far more affordable price. It’s a great long-distance cruiser with get-up-and-go, which inspires great loyalty to...