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What car? 4 cyl? 6 cyl? 8 cyl? 10 cyl? What year?
If it is a diesel, it has no spark plugs.
Most other BMWs have coil-over spark plugs. You remove the plastic cover on top of the engine and then unbolt and pull out the coils. The plugs are beneath the coils.
cylinder no. 5 misfire detected. Check the spark plug, the spark plug wire, the fuel injector, The fuel injector o-ring (if the o-ring is bad, no compression). You can swap the spark plug or wire with a good cylinder and if the problem moves over then you've found your problem. Same rule with the injector.
TO REPLACE SPARK PLUGS YOU REMOVE COIL PACK MOUNTING BOLTS THEN REMOVE THE COIL PACK WITH BOOT OVER THE SPARK PLUG.YOU HAVE 6 INDIVIDUAL COIL PACK TO EACH CYLINDER. YOU NEED A 3/8 RATCHET WRENCH - LONG 3/8 EXTENSION -SPARK PLUG SOCKET - SPARK PLUG GAUGE.AND TORQUE WRENCH.THE 2000 MODEL JEEPS FUEL FILTER INSIDE THE TANK.1993 - 1996 MODEL JEEPS FUEL FILTER LOCATED LEFT SIDE OF THE VECHICLE NEAR THE FUEL TANK.
you didn't say if you have the straight 6 or v 6.But i'll give the order for both.
The 4.9L straight 6 is 1-5-3-6-2-4----------- distributor rotor turning clockwise, and #1 plug is the first plug.
On the 3.0 and 4.2 V6 engines is 1-4-2-5-3-6-------#1 plug is the first plug on driver side---- facing engine.
the missfire can be caused faulty leads and spark plugs replace spark plugs and leads reset codes by removing engine fuse for 10 sec road test and check codes if the lean on bank 2 comes back you may have a faulty injector or intake manifold leak try some injector cleaner in the fuel overdose it it wont hurt
Check for spark at the cylinders you mention. Unplug the wires from the spark plugs, put a spark plug in the end of the wires, and attach the body of the plugs to earth, or an exposed metal part of the engine. With the engine running, you should have spark at the plugs. If no spark, get the ignition system tested. If there is spark present, and you think the fuel is ok, then the compression must be at fault. The things that are required for combustion are: spark, fuel, and compression. Get a compression test done on the engine, but first check for any vacuum leaks in the inlet manifold around the cyl 5 and 6 area.