Q: Random misfire in race car

asked by on

I have a race car with a 416-inch small block with about 13:1 compression, and I am having a random misfire.

If you are running a 13:1 compression in an engine then you will have to have high octane fuel. The first thing to do you should do is to check all the plugs to see if one is fouling out, indicating it is the one misfiring.

Your ignition system may be weak if you have problems accelerating. Check your spark plugs to see if they are producing strong blue sparks. If you still have the old point style ignition then you need to replace the points before anything since this will be the weak link in these ignition systems. If you have changed to electronic ignition then check the plugs, wires, cap and rotor for any indications of the misfire. You can check if the plug wires are arching to ground by using a spray bottle full of water to spray the wires to see if any arching happens.

I recommend having a mechanic, such as one from YourMechanic, come and check why your engine is misfiring.

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. Random misfire in race car

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 won't start or make any noise when the key turns over, but the battery has power because all my lights and radio is working.

Hi, thanks for writing in. This issue is most likely due to the starter. If the battery has full power, the starter is most likely receiving full power. If the starter is not working but it is receiving full power...

Q: Buzzing noise under dashboard

Hello. A buzzing noise that goes up and down with engine RPM is usually caused by an issue with the alternator. It is either caused by it being shorted internally, it being loosely connected, or a bad ground connection to...

Q: Pump bolt broken

duplicate

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.