My 2002 dodge stratus is acting like it is missing out or spuddering. I have changed the spark plugs and after doing so it ran really well for awhile then started doing the same thing again?

I believe the factory originals are champion brand, and would have been platinum, but it should still run decent with the coppers. The only thing I can think of is they are of the wrong gap. Copper plugs do not come pre- gapped at all and need to be done by installer. The gap for your stratus, if it's a 4 cylinder is .050. Wrong gap will cause no power and shaking. Correct champion number in copper is #443, and should say that on the box/plug.

Check your gaps in your plugs and check firing order then you might wanna check that the engine is in time.

Well you need a few things for an engine to run. Spark , Fuel, and Air..to start. Assuming that the plugs are the correct ones, and all the wires are connected properly & that the distributor cap was installed properly (AND SET IN TIME correctly). I would have to lean towards maybe a warped head. But there a quite a few variables that need to be eliminated before you can really begin to start down the road with a diagnosis. Good Luck

Check to see if coil is firing when car stalls may be overheating and not sending spark to plugs once it cools off it will fire again

you can have the engine light checked at auto zone or advance auto but check the cam position sensor

from the sounds of it you have a bad piston ring or a warped cylender does it seem to idle rough or act lick it has a miss in it?

The 'miss' could be attiributed to a misfire. If you have a SES light it would be nice to know the code. A misfire will usually send a P030X code (X=cylinder) indicating the need fr new plug wires. If no SES, it points to fuel delivery and the injectors would be the next stop.

Tom,
The spark plugs for that vehicle is Champions. Not anything fancy, just a resistor copper core plugs. DO NOT INSTALL DOUBLE OR SINGLE PLATINUM PLUGS. No bosch, no splitfire, nothing but the champion plug.

ANy other plug and you will start have random misfire codes and other "weird little problems".

I have been a shop owner for years and I tell you this because i have fixed weild little problems just by installing the correct plug. ]
You should change the plugs every 30K miles as well. Look in your owners manual and it should tell you your service schedule
Good luck
Harry
Mercedes and All Auto Repair.

the spark plugs are probably in the same place they've always been in...(sorry).

you probably have a cover over the motor and that will have to be removed to see where everything is.

you hooked the wires up wrong the whole fuel injector wire assembly goes up to the fire wall then clips into main wires
the fuel injector track is one track with wires
when you replace wires you also want to replace the injectors to match
buy new engine wire harness this will solve the problem