NUMBER 5 CYLINDER IS DEAD ON MY 1995 LINCOLN MARK VIII
THE ENGINE IS RUNNING VERY ROUGH. I HAVE TRACED IT TO CYLINER #5. WHEN I PULL THE SPARK PLUG WIRE OFF THE COIL, THE ENGINE DOESN'T RUN ANY DIFFERENT. ALL THE OTHER CYLINDERS CAUSE A DRASTIC CHANGE. I HAVE REPLACED THE SPARK PLUGS, IGNITION COIL, FUEL INJECTOR, AND WIRES FOR THAT CYLINDER. DONE A COMPRESSION TEST ALSO. (190PSI) STILL NO POWER FROM #5. WHAT COULD POSSIBLY BE CAUSING THIS PROBLEM?
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Re: NUMBER 5 CYLINDER IS DEAD ON MY 1995 LINCOLN MARK...
Check your plug going to your ignition coil should be 3 pins maybe your plug is worn,or filled with too much grease and dirt. Some electrnic parts cleaner. But I would look for a loose ground wire first usually green.
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It could be couple problems: -Misfire. (Include bad injector, Coil, spark plug wire) -Lost compression due to broken valves, cylinder wall and head or gasket.
Solution: 1 -Do compression test. - If not with in specification (Too low) Need rebuild engine due to broken valve, blow out gasket or even broken cylinder wall. -All cylinder has good compression: Now need to check Spark plug, wire and all injector. Injector must be with in specification (In Ohm) Follow its manual.
V6 engine: firing order: 1 2 3 4 5 6, distributor rotates clockwise. Left bank of engine (driver's side), cylinders 2, 4, 6 (#2 at front of engine). Right bank: 1, 3, 5 (#1 at front of engine).
Inline 6 engine: firing order is 1-5-3-6-2-4. Distributor rotates clockwise.
The number one tower on the dist. cap should have a mark or numeral 1 on it. If not, turn crankshaft to top dead center of compression stroke on number one cylinder, the 0 degrees or "T" mark on the crank pulley pointer. If you are on the compression stroke (not the exhaust stroke), the rotor under the dist. cap will be pointing to the number one cylinder spark plug wire tower.
The knocking can be from #5 cylinder which should be the front cylinder on the drivers side.
You should disconnect the negative battery cable for 10 minutes and see if the reader says the same thing after you restart the car.
If it does not cure the problem, it could be the coil pak for #5. The last thing would be a dirty or bad injector for #5. Hopefully the reader will show you fixed it.
The knock you refer to can easily be a balljoint or tierod end. If you are due for a frontend alignment those are parts which will be checked before an alignment can be done.