I have a 2004 Dodge Intrepid that pulled codes P0420, P0344 & P0340. I changed the plugs & coils AND the Cam sensor. Added fuel injector cleaner to the tank on fill up, now the engine sputtered on hard acceleration. Took the negative cable off the battery for a half hour to reset the codes. Re-attached cable and drove the car about 1 mile and upon stopping the engine dies. Restarts and has a hard time continuing to run without having pressure on the accelerator. The engine light has not come back on, but I have not been able to get it up to have it scanned. Is there something else I can do that is obvious to anyone?

SOURCE: Engine sputters when giving gas, has a hard time accelerating

Have the cam sensor and/or crankshaft sensor checked. They could be going bad.

Harvey N Tawatao

• 3854 Answers
• Posted on Jul 02, 2009

SOURCE: Check engine light

A multi misfire may mean that one or more of the following has happened:
Faulty spark plug or wires, Faulty coil (pack), Faulty oxygen sensor(s), Faulty fuel injector(s), Stuck/blocked EGR valve / passages, Faulty camshaft position sensor, Defective computer.

The engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wire, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the the problems were faulty fuel injectors. 

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Good luck and hope this information helps, keep me posted, be glad to help you get the truck running 100% again. Not sure if your running a K&N air filter, and if you are there may be a flim of oil on the MAF sensor that is making you run lean. You may want to spray down the MAF sensor with a can of MAF cleaner. 

SOURCE: My 1998 Dodge caravan started missing and chugging

Catalytic converter sounds plugged up. The popping back through the throttle body kind of gives me that suspicion. EGR valve stuck open could give that too, but I would think either one of these would throw a computer code.

SOURCE: I'm getting the engine light coming every so

I have a 2004 dodge stratus 2.4 dual overhead cam. When driving down the road, bell goes off, check engine light comes on, and it's like I'm driving on limp mode, when going over 2000 rpm's, there's a severe stutter. After getting code for light it points to cam shaft sensor, which i changed. I also changed crank shaft sensor. After all of this was done, drove great for about 30 miles and the same thing happened all over again. If anyone can point me in the right direction it would be greatly appreciated.

SOURCE: engine trouble codes: p0016 p0340 p0344 p0456

You can look up the codes on Wiki site