Trouble code P0303 means:Cylinder 3 misfire detected
Check Coli, an wires attached to coli, coli my not be getting enough juice
A flashing check engine light means an engine cylinder misfire has been detected
check wire routing,order, or if replace is needed, after that check compression, head gasket,or crack in head.
p0302 is cylinder 2 misfire, you need to fix the cause of the misfire. Possible causes are plugs, coils, injectors......
on the millenia missfire, check your catalytic converters it has 3 chances are one or more has fallen into pieces in the pipe where do people come up with guesses like these? random miss on a millenia is most likely electrical. definitely NOT cats. if you have a 2.5, check your ign wires, spark plugs, and ign distributor. if you have a 2.3, check plugs and coil packs
A flashing check engine light is usually due to a misfire. see related questions below.
what are the possible causes of misfire on number one cylinder in a dodge 2003 ram 4.7 liter engine
check for low fuel pressure (its critical) with guage on schraeder valve on fuel pipe on rear of engine in cab drivers side , should be around 55psi
possible it could be the cam shaft position sensor or it could be the control module in the distributor.
its most likely the air by pass valves and some coils that need to be changed.
There are a few things that can cause a misfire in a car. Some of these would be oil in the fuel system, spark plugs going bad, or spark plug cables needed to be adjusted or replaced.
Were the spark plug wires replaced? Even a pinhole in a plug wire can leak enough spark to cause a misfire. Try swapping that wire with another similar length wire from another plug and see where the misfire is then. If the misfire moves to the new cylinder or ceases completely, you'll know the wire was bad.
This is usually a bad coil pack. This cylinder is located in the middle back. I had a lot of dealers that didn't know and some manuals are wrong. They run 1,3,5 on the back.
Start with a bad Spark Wire Followd by a new Distributor Cap and Rotor button. Pening that failure, replace the sparks.
It's possible your drive belt is loose and skipped a couple "cogs."
Possible cylinder misfire and/or failing engine mounts.
Bad spark plug wires or spark plugs can cause your 1994 Chevrolet S 10 two misfire. A plugged fuel filter can also cause the vehicle to misfire.
There are numerous things that can cause a misfire, see related questions below.
possible misfires caused by spark plug/coil wires
pull the plug and see if there is oil on the electrobs
I hope your barb was a misfire.
you should have your injectors checked.
replace plugs, if already replaced, replace coil that is plugged into sparkplugs. Could be many things really - but yes if plugs are old, replace them first. Engines also misfire when they do not have the expected amount of fuel and air, so any problem with either of those could cause a misfire (air filter clog, fuel pump dying, bad fuel injector, bad wiring to the plugs or fuel injectors). Not likely, but if you hear a lot of noise, a bad timing chain could also be responsible. It is also possible that a bad MAF or O2 sensor could cause a misfire. If your O2 sensors are old (>100k miles) you should replace them, only use genuine Denso replacements (they can be bought for around $35 shipped), other brands do not work well with Toyota's extra sensitive requirements.