Q: Engine acts like it misfires occasionally during regular driving or while giving it gas - 2002 Ford Mustang

asked by on October 21, 2016

I've had this problem for a while, my car kind of sputters every now and again like it's miss firing but it doesn't feel like a misfiring to me. I have tested all coil packs with a multimeter and they were all the same across the board and I even unplugged them individually while it was running and they all seemed to have affected the engine. I replaced all 8 spark plugs and cleaned the insides of the coil packs and it still does it. Thank you for your time and hopefully we can get this resolved. Thanks!

My car has 170000 miles.
My car has an automatic transmission.

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

Hello there, intermittent misfires can have many different causes on your 2002 Ford Mustang. The most common cause is the spark plugs, so it is good those where replaced first. Other potential causes would be a fuel injector, coil, vacuum leak, oxygen sensor, or a wiring harness fault.

A qualified technician, such as one from YourMechanic, will be able to diagnose your intermittent misfire and make any repairs required to get your car running normally again.

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

Car won't start due to dead battery.
If the battery is dead after being used for only three months you may have a component that is draining the battery while the car is turned off. If this is the case I would ask for help from a...
SRS light on
If the lights on the left side of your car are not working, then there may be one of several electrical problems. Perhaps a bulb has burned out, or a relay has malfunctioned. As this problem is probably electrical in...
Gas usage high
Depending on the conditions, 25 miles per gallon is not too bad, especially in the winter. Gas companies are required by the government to change the mixture of gas in the winter to decrease vehicle emissions. When they make a...
The front driver's side wheel feels wobbly while driving
Excess wheel play can be caused by several components. You will want to perform certain tests in a process of elimination to target the issue. Brakes and particularly the rotors can cause similar issues. You would notice the symptoms when...
Engine takes to long to warm up I've replaced thermostat already and it misses horrible till it warms up its a 4.9 engine
This engine uses a cooling fan clutch that controls the fan speeds on demand when the engine radiator starts to get hot if increases air flow to cool the engine down and slows the fan when it needs to increase...
Cost to fix: Spark plug #4 on passenger side blew out of its cylinder. Common on 5.4 Tritons. only need this spark plug 2000 Ford F150
Hi there. Unfortunately, this is a service that requires advanced machining tools; which our mobile mechanics don't typically have access to on site. As such, it's not a service we provide at YourMechanic.com. You might be better served contacting a...
If u replace one motor mount should u do the rest?
Hi Kara. Thanks for contacting us tonight. When you replace one motor mount, it is best practices to replace them all at the same time, as the others will quickly break if not replaced.

Related articles

The Best Used Cars to Buy If You’re a Caterer
If If you are in the catering business, you need a reliable vehicle that will provide you with what you need to transport your food, linens, and other supplies. Generally speaking, you're better off buying gently used, because you will...
The Best Used Cars to Buy If You're a General Contractor
If If you're a general contractor, you probably aren’t in the market for a used car. More likely, you’re looking for a pickup truck, because you need to haul equipment and supplies to various job sites. Most contractors will likely...
How to Find the Keyless Code on a Ford Explorer or Mercury Mountaineer
Many Many Ford Explorers and Mercury Mountaineers were manufactured with an option known as the Ford keyless entry keypad. Some models refer to it as SecuriCode as well. It is a five-button numeric keypad that is used to: Eliminate fumbling...