O_Dogg wrote:
i talked to the local jeep dealer here and told him my starting and misfire #6 code story. he said sometimes they have to remove the fuel rail and clean out the injectors by hand. (he actually wants me to save money and do it myself) since i only have the drivetrain warrenty it wouldnt cover electrical unless there is internal damage i mentioned the valve spring breaking issue some of you have had or heard of and he said it is more common in the V8 engine as far as he knows they never had one in for that reason.
but he has had a few 3.7's where they could not isolate the ignition faults and cleaned the injectors and it worked fine.
so what i really need is a step by step to remove, clean and re0install the injectors and rail.
To properly clean the injectors yourself would require an injector cleaning machine.If you could remove them yourself and take them to a shop(such as ours)it would save alot on the cost.The injector cleaning machine has a holder for all 6 injectors.They are then submerged about 1/4 of the way into a special cleaning solution.The machine will actually pulse(open and close rapidly)the injectors while the solution is cycling thru them.The term is called "Sonic Pulse Cleaning". We do an Ohms test first to make sure the windings in the injector are good.If so,then we do a "Flow Test"before cleaning and one after cleaning to note any positive changes.To remove the rail yourself,locate 2 or 3 bolts that hold the rail down and remove them.As you probably already know,you should relieve the pressure on the system before removal.Spray penetrant around base of all injectors,with a fairly large screwdriver,gently pry up at the lowest point near the intake on each injector until they all become free.Once they are all out of the intake,turn the rail up side down and remove clips holding them to the rail.Not really necessary to remove lines from rail.When reinstalling,make sure the shop that cleaned them replaces the O-Rings and filter baskets.Lube O-Rings and they will install and seat properly.Hope this helps.
Ron
P.S. When you remove them,you need to ohm them out to see if they are all at or about 12.5 ohms.If one is more than 2 ohms off,it's a bad injector.You can unplug the connectors while they are still in engine and ohm them.Might save you from removing all of them first.And possibly a big bill to clean them.
It's more likely that one is bad rather than dirty.
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