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I had a misfire in Cylinder 5. I replaced all 6 spark plugs and the coil on the Cylinder number 5. I am continuing to a have a misfire on cylinder 5 and now 3. Do you think a bad or plugger injector would do this? Thanks for any guidance. Jason
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Misfire in cylinder #6. Could be bad spark plug, spark plug wire, cop coil, bad intake/exhaust valve, clogged fuel injector or piston/cylinder problem. What's the year, make, model, engine and have you been following the recommended maintenance schedule for new plugs?
change all plugs with proper ones - they are picky for some reason - do not change number or brand from original - coils were probably ok, - get some injector cleaner and run through it but check for exhaust leak at e g r tube - is a common over looked cause of misfire - a thing to keep in mind is misfire isn't always spark issue. hope I was of some help
All these codes indicate you have a misfire on cylinder number 5. P1399/P0300 - Random/Multiple Cylinder Misfire Detected P0305 - Cylinder #5 Misfire Detected
Causes: - Improper spark plug at cylinder #5 - Insufficient compression at cylinder #5 - Incorrect fuel pressure - The injector circuit is open or shorted at cylinder #5 - Fuel injector #5 may be faulty - Intake air leak at cylinder head
When a misfire occurs, engine speed will fluctuate. If the engine speed
fluctuates enough to cause the Crankshaft Position (CKP) sensor signal
to vary, The Powertrain Control Module (PCM) or Electronic Control
Module (ECM) can determine that a misfire is occurring.
When is the code detected?
- Engine Cylinder #5 and #6 is Misfiring.
Symptoms: - Engine Light ON (or Service Engine Soon Warning Light) - Lack/loss of power - Hard start - Engine hesitation
Possible Causes: - Improper spark plug at cylinder #5 and #6 - Insufficient compression at cylinder #5 and #6 - Incorrect fuel pressure - The injector circuit is open or shorted at cylinder #5 and #6 - Fuel injector #5 and #6 may be faulty - Intake air leak at cyli
Possible Solution: - Perform Injector Service - Replaced Spark Plug #5 and #6 - Replaced Injector #5 and #6 - Replaced Ignition Coil #5 and #6
P0300 Random Misfire Detected P0301 Cylinder 1 Misfire Detected P0302 Cylinder 2 Misfire Detected P0303 Cylinder 3 Misfire Detected according to this fault codes first mark ignition coils 3 ---------------- 6 2 ---------------- 5 1 ---------------- 4 RB-------------LB this right banks and left bank, please remove Ignition coils with lids and spark plugs from right bank and swap with left bank, if fault code change as P 0304 Cylinder 4 Misfire Detected P 0305 Cylinder 5 Misfire Detected P 0306 Cylinder 6 Misfire Detected You can Identify it's a faulty ignition system then next swap ignition lids from ignition coils be careful each coils have two lids one short and other long bit deference and when you remove and fix it to the car keep in mind correct order because each coil two different fire for two spark plugs don't mix up, if you mix it can create the fault code.if you detect any fault ignition coils or spark plugs or lids replace that and also whether god or bad recommend to replace spark plugs, find the right that's most important thing, if this way couldn't found the any ignition fault next step is check fuel presser, when the engine running fuel presser must be around 4.5 bar without engine running must be 4 to 6 bar if the fuel presser too low need to check two different things one is fuel pump other is fuel injectors, in this case you can swap injectors from right bank to left bank and find is the injectors leaking, if not leaking faulty fuel pump.is this information helped you? if yes please leave a comment,
CYLINDER NUMBER 5 IS STANDING IN FRONT OF VECHICLE IT WILL BE THE 5 CYLINDER COUNTING FRONT TO THE BACK CYLINDERS IS IN ORDER 1 2 3 4 5 6 THAT YOUR CYLINDER ORDER. YOU HAVE A INLINE 6 CYLINDER ENGINE.YOUR MISS FIRE COULD BE THE COIL - SPARK PLUG - CLOGGED OR FAULTY FUEL INJECTOR. ALSO INTAKE MANIFOLD VACUUM LEAK OR SLIGHT HEAD GASKET LEAK WILL CAUSE MISFIRE.
Cylinder numbering for your engine is 1-3-5-7 on the left hand bank and 2-4-6-8 on the right hand bank (passenger side). To be sure where number 1 is look across the cylinder heads number 1 cylinder is always the head that is furthest ahead towards the front of the vehiclek, then count 3 cylinders back on that side, should be left, and that should be number 5. pull the spark plug first and check it and at the same time pull number 3 's plug and swap the coils from 5 to 3. If the plugs are bad replace them all. Then run the vehicle and see if the misfire code followed the coil to number 3, if it does you know you have a bad coil, they usually run about 90 - 100 bucks each, that is if the plugs or wire wasn't the problem. hope this will help you. good luck.
cylinder #6 is misfiring check plug(if gap incorrect can cause misfire, fouled etc) , coil on plug (or Wires) poss spark plug coil pack (check for cracks and heat damage in insulation of pack)
Cylinder number 5 is misfiring. Check spark plug, spark plug wire and ignition coil for the number 5 cylinder. The number 5 cylinder is the closest to the front of the car on the drivers side. With engine running in dark (at night) take a spray bottle of water and lightly mist spark plug wires and coil and look for arcing. Autozone will test coil for free.
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