2000 excursion misfire on cyl 4. traded plug,

Try a new plug wire on cyl 3 if that doesn't fix it you could have a bad valve or compression problem on cyl 3 Try doing a compression test also If it has injectors for each cylinder you could have a bad injector for cylinder number 3

If you had code P0305, I don't know why they would have done anything to the #2 cylinder but if they have already replaced the plugs, wires and injector; here are a few more items to check:
1) Check connections from ECM. Look for any corrosions or bent/broken pins.
2) Check the fuel line pressure
3) Check the engine compression
4) And if the above are good, then you will probably have a defective ECM

P0304 is a misfire cyl 4, check the plug wire, and spark plug

misfire can also be cause by stop up fuel filter or clogged fuel injectors or weak fuel pump pressure.

Clean the egr valve which would cause rough ideling and misfire........Hope this helps u out.

CODE P1300 IS MISFIRE DETECTED FUEL PROBLEM. WHICH MEAN 3 FUEL INJECTOR IS CLOGGED UP.HAVE FUEL INJECTORS CLEAN AND CHANGE FUEL FILTER.

have the injector checked on it

p0203 injecter circuit malfunction cyl #3. p0204 injector circuit malfunction cyl#4. po138 02 sensor circuit,high voltage cylinder bank no.1,sensor no.2

do a compression test,as the intake manifold,like alot of fords is no good.

Hi

If this is an electronic EGR valve which is opened and closed by the PCM, then it may simply have to relearn the fully closed setting for idle, and it can sometimes be done by switching off the ignition, disconnecting the wiring plug from the EGR valve, and then resetting the fault codes with a scanner.

Now here's the important bit, the very second the scanner tells you the fault codes are cleared, quickly switch off the ignition. This will prevent the PCM from setting another code.

You can then reconnect the EGR valve and hopefully the lesson will be steadfast in the PCMs memory!

As for the cylinder 5 misfire, if it is still misfiring then you need to check for spark, fuel, and compression in that cylinder.

Run the engine for a minute and then whip out the no.5 spark plug. Is it dry or covered in fuel? If its covered in fuel then you have a spark problem, and if its dry then you have a fuel problem.

If its a spark problem and the plugs each have their own coilpack, then it is very highly likely the coilpack at fault, and in which case it is best to fit a new plug as well as a coilpack.

If its a fuel problem then it is very highly likely the injector at fault but you should check for a supply and earth pulse at the injector before condemning it, because sometimes the injector loom becomes crimped and damaged.

It could be a compression problem, but I doubt it, however, just to be safe you may want to carry out a compression test on that cylinder before throwing parts at it.

An easy way of determinig injector and coilpack faults is to move the suspect part onto another cylinder and see if the fault code follows it. If it does then you know that component is faulty.

Regards

Geordie