Q: Skipping on #7 cylinder

asked by on

My pickup has a 350 in it. I just rebuilt the engine, and it had a slight skip on the #7 cylinder. But now it’s worse than it was and then gets even more terrible when the car is low on gas. I’ve replaced the plugs, plug wires and rebuilt the carburetor. But it’s still skipping. Do you have any ideas on this?

Hello. If this occurs more when it is low on gas, then you appear to have a fuel system issue. I would usually check the fuel pressure first. I would then inspect the lines going back to the tank to see if there are any cracks or signs of leakage. If the fuel lines and fuel pump are fine, then the tank needs to be dropped so that the internal lines and strainer can be checked for failure. If you are planning on having this fixed, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the misfiring issue and let you know what repairs are necessary.

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 on #7 cylinder

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: Q: Loud knocking noise.

When you say a knocking noise I assume you are referring to the engine. If the engine is indeed making the sound the first thing I would recommend is to check your oil level. This can be done by pulling...

Q: idle control

My sense is that it is sucking in air through a broken vacuum hose. If it sounds like when you put it in gear and the engine lays over on the motor mounts, it is opening up a source of...

Q: Engine looses power.

Hi there. What you are describing is common with a clogged fuel injector or throttle body that is dirty. In some instances, a blockage of carbon deposits will impede the engine's ability to accelerate smooth. Sometimes simply having the fuel...

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...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...