Hi there i am currently working on a dodge 97 pickup with the magnum it is currently missfiring on cyl 2 and 3 ive gone through so much work even gone to the depth of taking of the heads and getting new heads thinking valves were cracked ..checked crank angle sensor cam sensor new leads injectors plugs tried a new ecu the injectors are firing and there is spark i put a scanner on it then it gets to operating temp and and logs missfiring on cyl 2 and 3 ....one of the heads did have a small crack in between the valves on chamber 1 & 3 so i was sure that was the problem but now the heads are back on and same problem...ive replaced ..crank angle cam sensor new ditributor cap and leads new injectors ..its as if the timming is not right on just these two cylinders ..mmmmmm any help would be much appreciated
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Hi there: Misfire #1 or #2 cyl means DTC P301 or P0302 fault code.
A code P0301 or P0302 may mean that one or more of the following has happened:Faulty spark plug or wireFaulty coil (pack)Faulty oxygen sensor(s)Faulty fuel injectorBurned exhaust valveFaulty catalytic converter(s)Running out of fuelPoor compressionDefective computerPossible Solutions
If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as 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 wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.
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These are misfire codes.This means that your vehicle is missing.The 300 is a random misfire and the 305 is for cylinder 5,and the 306 is for cylinder number 6.Check the plugs if they are good then you could have bad coils.They are top of the plugs.Hope this helps.Good luck.
hi from uk i assume you have done all the above work correctly? and the leads from coils are correct firing order 1 3 4 2 ? CAMBELTtiming set correctly etc as you say this has happened since cyl head renewed and miss fire is on Nos 1+2 cyl's this normally suggest now after all work u have done and assume compressions are ok ? i had such a fault on a customers mini some years ago who had done exact type of job as you described this fault turned out to be the inlet manifold gasket had split between cyls inlet ports and resulted in missfire on 2 cyls adjoining on removal of manifold the gasket had been damaged whilst reassembling new gasket cured missfire which had caused weak mixtur on both cyls ie on induction more air being drawn via cracked gasket on each cyl and as your engine if injection same problem?? might be worth checking?? hope this throws some light on the problem?
just depends on oil pan-2 or4wd-normally 6L and can be up to 8L-dodge have a bad habit of using oil if the gasket under the intake breaks,it will **** the oil out of the area under it,engine will run fine with a slight missfire