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Re: How to remove spark plugs on '93 cadillac devil
THE FRONT ONES ARE EASY. THE ONES NEAR THE FIREWALL ARE THE TOUGH ONES USUALLY NOT A DO IT YOURSELF PROJECT, AS YOU NEED TO REMOVE THE TOP MOTOR MOUNT AND ROLL THE ENGINE FORWARD TO GAIN ACCESS.
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CODE SCAN VECHICLE SOUND LIKE SEVERE CYLINDER MISFIRE, COULD HAVE BAD SPARK PLUGS OR WIRES.BAD IGNITION COILS,COULD HAVE DIRTY FUEL INJECTORS,SLIGHTLY CLOGGED FUEL FILTER MANY THINGS WILL CAUSE MISFIRE BUT CODE SCAN VECHICLE SEE WHAT CAUSING ENGINE MISFIRE.
Check the compression
and remove some spark plugs and then crank if water comes out then there's your problem. If water is present remove plugs and crank for 10 -15 second intervals with one minute breaks to remove water.
Did you resurface the cylinder heads? If not (brace your self) you should redo the job and have the heads resurfaced.
As an alternative you could try some Blue Devil block sealer but it's definitely not a permanent fix.
If no water comes out and compression is good, check for spark and for fuel. You can check for spark by removing a plug wire, inserting a screwdriver (one with a thick rubber/plastic handle) and hold the metal part of the screwdriver about 1/2" away from some metal piece on the engine, when you crank the engine you should see a spark.
Check for fuel with a fuel pressure tester and put a test light on one of the injectors, it should blink momentarily.
By doing these things you will be directed to the next steps.
buy the new ones and carefully remove one the same length and replace it with the correct length and do it one at a time. or mark them with tape and # them.
Don't over lap them if you can help it.
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