Skip the auto shop - Our mechanics make house calls

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?

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!
  • Home
  • Questions
  • 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 running rich

It can always be a challenge when addressing an issue with a classic car, such as with your 68’ Chevelle. Provided that your Chevy has not been modified, your problem may simply be found in the spark plugs. Each spark...

Q: 2008 Nissan rouge I changed control arms cuz n is stlll making a sound like wheels going to fall off n now tracking contr lite on

The first thing to do is to scan the computer systems to get the codes stored for the traction light being on. The noise may be coming from the sway bar links or the struts are worn and will make...

Q: Why does my car jerk & accelerate by its self?

From what you've described, the jerking is most likely due to a misfire or a vacuum leak on the engine. You should have all the spark plugs and wires checked for misfiring after your computer is scanned for a misfire...

Related articles

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...