Skip the auto shop - Our mechanics make house calls

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  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 started overheating two days ago. Changed the thermostat and the water pump, still overheating 1998 Chevy Lumina

Hi there - you may still have a problem with a clogged radiator, or the auxiliary cooling fans are not coming on properly. I recommend a engine overheating inspection performed by a mobile, professional mechanic, such as one from YourMechanic,...

Q: What is wrong with my transmission? 1968 Chevy Impala

Hi there. It sounds like the transmission forward clutch plates are slipping. First check the fluid level and fluid condition by putting the dipstick fluid on a clean white towel and seeing if you see what looks like sand in...

Q: car wont start dont know if it is the starter or bad wiring, or a bad ignition?

Hi there. If you are working on an older OEM Impala, it's more likely than not that the wiring is your problem. In some cases, when you try to start the vehicle and you get a single "click", it's caused...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...