I have a 1992 dodge dakota that gives me a code 27 n tells me cyl.#5 misfire, have checked compession n its good ,dist. good spark is good ,replaced injector n computer tells me faulty control module n it is in ecm . runs good sometimes then runs bad n still its cyl. #5 the engine is 5.2l

First. That motor sometimes has carbon build up issues. But. Make sure u have good spark plug wires. Not cheap parts house wires. Also no I mean NO Bosch plugs! Anything but Bosch. Then if prob still there check injectors by swapping them to fry two cyl.

Dude you just got ripd hard . He's obviously 1 of those garages that do that to people

could be your coil, but can also be internal, have you replaced both the air & fuel filters ? if so, dump some good fuel injector cleaner into tank when half empty , top off with 91-92 octane fuel, see how that works for you, do some highway driving, stop & go traffic creates problems, todays fuel w/ethonal is bad for older cars, be sure to have code cleared from ecm !

you might want to have your timming chain checked and make sure all your spark plugs or gap right and your spark plug wires are good

Can you take the valve cover off and turn the crank until the number one valve closes, then check the rotor on the dist ?
TDC for number one cyl is when that intake valve closes.
I assume you checked the compression and all 6 cylinders are ok ?
If you have compression and the valve timing is close, you should be able to turn the dist and get it to backfire or something if the ignition timing is the only problem.

Im idling at the light in my 2000 Dakota R/T and all of a sudden my check engine light comes on and the engine develops a miss and starts to smoke. Diag code says misfire in #5 cyl and there is a rich raw fuel smell from exhaust. I have 175K trouble free miles and have checked compression which reveals worn but good piston rings.I replaced head gaskets and of course still exists. When I got a hand to crank while I checked voltage at each injector, #5 showed higher than the rest at all times without dropping to zero, so i'm replacing the ECM which controls signals to injectors. Oh yeah I replaced #5 injector before voltage check to no avail. Tell me if you think Im on the right track replacing ECM.

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

mcdevito75 here, Could be a worn timeing belt, a crankshaft position sensor. Have your local shop check it out.

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.

Check vacuum lines going to evap canister for cracks or splits, causes to much raw air intake.