Skip the auto shop - Our mechanics make house calls

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?

A: Hello. If this occurs more when it is low o...

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?

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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Truck

Hello. Both of these 2.2 liter engines will use the same crankshaft. It may not be a direct fit for the fact that every crankshaft has a different cut so it may not fit into the bearings of your engine....

Q: Engine wont reach operating temperature

The first thing to check is to see if the cooling fan clutch is working properly. Start the engine when it is cold and rev the engine up to 1500 rpm and listen to the cooling fan to see if...

Q: In a 3y engine is it possible to loose coolant through the intake manifold

Hello. If the intake manifold is loose, this can cause a wide variety of problems including a coolant leak into the intake. This can also cause severe overheating problems and possibly fatal engine problems. I recommend having a qualified professional...

Related articles

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...
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...
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...