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: Noticed strange vibration in car

Having one of your tires begin to make noise can never lead to a good feeling. In situations involving tires, there can be a few reasons why you would notice a strange vibration and noise near the it. The wheel...

Q: 1968 Ford Mustang has an intermittent surge at idle

There are only two things that can cause this problem in this engine. One is the distributor timing jumping up and down due to worn out components inside the distributor. The other problem may be that the carburetor is not...

Q: Do I have vapor lock, carb icing, or fuel pump issues?

I think more than anything else that the multiple grades of fuel you are using is the primary source of your problem. If you use an unleaded gasoline then use a racing 110 octane leaded gasoline, it creates tons of...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...