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Re: Sport Wrangler 6 cyl. Engine lite flashing....
Check the plugs, wires and coil pack for these two cylinders. Most lilkely it is the coil pack, they work for 2 cyclinders at a time. cylinder motors use 3 and 8 cyl moters use 4 of these. If your und=sure where the coil pack is, follow it backwards from the spark plugs.
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Hi. You have misfires on cylinders 4, 5 and 6. If there are no faults on cylinder 1, 2 and 3 then I would check the power to the left bank injectors. Also check spark plugs and ht leads. If there are running issues then this should be an easy fix. If the faults are very intermitant then it can be a bit tricky to isolate.
Did you resolve the other codes? p0300 random multiple misfire, p0305 misfire cyl #5, p0307 misfire cyl #7? You could have bad ignition coils or a vacuum leak. Check your coils and check for vacuum leaks at the intake manifold check vacuum hoses. Hope this helps!
po305 is related to missfire on #5 cylinder
po440 is related to fuel tank pressure
pO441 is for evaporator purge flow malfunction
po446 relates to vent control valve electrical circuit malfunction
missfire is seperate from the other codes
as for the other three codes replace the vent control valve solenoid located near the charcoal canister the oth3er codes can relate to a faulty solenoid
after replacing light will only go out if you clear through a scan tool or three drive cycles of over 10 min each
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.
Vacuum lines will not cause a specific cyl misfire. You may have a bad coil pack, or bad injector. You will need to make sure you have spark at the specific cyl listed for the misfire, and can test to see if you have injector pulse using a noid lite. Also, and good scan tool can show you live data, and allow you to watch the components operation, and give you a good starting point to determine the miss.
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