Q: Multiple misfire codes and hard shifting

asked by on

I am at a loss.. I recently bought a used 2002 durango 4.7. On driving it home, of course i punched it. The motor immediately seemed to "bog" out, the rpms went nuts, and the truck violently shudders. I went by autozone to check the code, came back a p0351, and p0301. Sp i bought an ignition coil and plug. When i took the old plug out, it was visibly damaged, the side looked like it had broken out. So i replaced the plug and coil. Reset the codes, immediately the p0351 came back on. Its really hard to describe, but the engine makes a really loud sucking sound on acceleration. If gently accelerating, it will crawl through gears. But if i accelerate hard, the rpms goes nuts, the whole truck shudders. Now, if i release the gas, and press it again, i can "manually" shift it....im sure the code and shifting issues are seperate, but i dont know enough about either....ive changed the coil and plug, and honestly cant afford a mechanic. As of right now, i have a 0456,0300, 0301, and 0351 code.

My car has 240000 miles.
My car has an automatic transmission.

Hello. I would start by doing a compression test. From the codes you are getting to the way that is is running and the sound that you hear it sounds like you have a failed valve seat. When this occurs the valve will not close properly and the seat may be inside of the engine damaging the piston. This is very common. If the compression test comes back fine, then there may be an electrical issue with one of the grounds. If you need to have this looked at in person, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the codes and move forward with the proper repairs.

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. Multiple misfire codes and hard shifting

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: Does not go into gear. 2002 Dodge Stratus

Hello. Code P0403 is the trouble code for an issue with the vehicle's EGR circuit. The EGR, short for exhaust gas re circulation, circuit is an emissions system that is responsible for recirculating exhaust gases in order to reduce N0x...

Q: Can a leaky water pump cause an engine misfire?

A water pump leak by itself cannot cause a misfire unless you overheated the engine and caused a blown head gasket or the coolant gets on spark plug wire causing misfire.

Q: 04 dodge Durango, 3.7 just changed engine,battery,and starter. Still won't crank over, getting power to solenoid,when key is turne

The most important thing to understand about electricity is it occurs on the atomic level. What appears to be a good connection to the human eye may not be to electricity. This is why we have test lights and multimeters...

Related articles

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...
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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...