Q: Skipping during idling and driving

asked by on

My Passat started running very rough and having a backfire during acceleration that seemed to come from the engine. I replaced the spark plugs and it is running much smoother but still has an occasional skip. It does seem to backfire a little at about 1500 to 2000 rpm as I'm accelerating.

When changing the plugs, I noticed what seems to be oil in no. 5 and 6. What could be causing this?

My car has 195000 miles.
My car has an automatic transmission.

Hello. Oil on the spark plugs can be an indication of a failed O-ring, worn piston, or worn valve guide. The first of which is less serious than the others, but it should be inspected sooner than later. Catching a more serious issue now may save your engine. It may be related, but don’t assume the worst just yet. When experiencing a misfire after replacing the spark plugs, the first step should always be to retrace your steps and make sure the plugs are installed correctly. Pay extra attention to the spark plug gap, which can be altered when you tightening the plugs into place. You will also want to verify that the spark plug wires are securely attached and are clean, dry, and tight. If the misfire is being caused by something else, it is likely it will show itself on a diagnostic scan, so have the vehicle scanned at your local parts store. You should verify the repair and then have the vehicle scanned if needed.

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. Skipping during idling and driving

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: is it worth fixing the timing belt and timing pulleys?

If the belt is broken or the engine is noisy and having problem, then no, it probably wouldn't be worth purchasing. For whichever car that you are seriously considering moving forward with, I suggest having a certified mechanic conduct a...

Q: Is there anyway to bypass the ac compressor they make bypass pulleys but can't find any for an 88 Grand Prix

As long as the a/c clutch bearing is not seized, it doesn't matter if the a/c compressor is locked up. As long as you do not turn the a/c on, this causing the clutch to engage and attempt to run...

Q: volkswagen polo engine cover purpose.

Yes, these covers to serve a cosmetic and functional purpose. One purpose is to cover up the workings of the engine in case water is to splash under the hood so the electrical components do not get too wet. Many...

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 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...
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...