Q: The 3rd and 4th cylinder are fouling the spark plugs. What could be the problem?

asked by on

I believe my truck is misfiring in the 3rd and 4th cylinders. I bought new spark plugs it helped for a while then it stared putting and bogging after about a week or two. I think it might be the distributor but i dont know. What do you think is the problem?
My car has a manual transmission.

Hello there, it sounds like you have several different issues going on with your 1989 Chevrolet S10. You did great replacing the spark plugs to address the misfire issue as this commonly is the cause. If the problem persists or the plugs are fouled there could be a few other issues present such as a valve cover leak onto the spark plugs, plug wires, cap & rotor, vacuum leak, or a fuel injector.

To avoid any unnecessary repairs, a qualified technician, such as one from YourMechanic, will be able to diagnose your misfire issues and make any repairs required to resolve it. Best of luck.

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. The 3rd and 4th cylinder are fouling the spark plugs. What could be the problem?

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 will not spark on 2 coils - 1995 Dodge Stealth

You most likely have a bad ignition power transistor. I would however recommend replacing all three ignition coils with the ignition power transistor since they are the most likely cause of the transistor failure. If you have not done so...

Q: Q: AC not working properly

Hello, the refrigerant system needs checked for leaks. The belt attached to the compressor should be checked to make sure the compressor clutch engages even if only for second. If all that is good then a set of gauges need...

Q: I have a jerking ticking and popping noise when I accelerate what is it

Would need more information on the car and engine you have but the problem sounds like a misfire from the ignition system or carburetor problems.

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...
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...
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...