testing procedure and ohm reading for the distributorless coil

1999 FORD EXPLORER
150,000 MILES
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HANDY-MAN
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a mechanic said that i had a dead cylinder!I would like to check it out and try to locate the problem my self if i could.i would like a schematic or photo. I have no shop test equipment to test codes. I have a ohm /volt meter. I had a similar problem with my ranger 2002. i used a ohm meter to test and found out that i needed a coil for it.I have a manual for it. runs grate.
Nov 21, 2011 at 8:22 PM
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RIVERMIKERAT
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Go to a Pep Boys, Autozone, or similar type store and rent or borrow a compression gauge. Check the compression on each of your cylinders. Compression should be a minimum of 100PSI and vary by no more than 10-15PSI from highest to lowest. If any readings are low, put a few drops of oil into the cylinder and repeat the test. If the compression comes up, you have bad rings, if not, a bad valve.

Pull the spark plugs one at a time and see if they are getting spark. Remove the plug wire and the plug. Put the plug back into the end of the plug boot. Using a plastic tool, hold the threads of the plug against a good ground and have someone crank the engine. You should see a good, strong spark. If not, remove the plug and insert a Phillips screwdriver in the boot and repeat the cranking process. Spark indicates a bad plug, no spark points to a bad wire.
Nov 21, 2011 at 8:28 PM
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HANDY-MAN
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Thank for the info on the leak down test. I believe thats what its called. thanks again rivermikerat. I was wondering if you had the ohm readings and the procedure i was looking for.

Thanks,handy-man
Nov 22, 2011 at 9:09 PM
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WRENCHTECH
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A resistance measurement is not very reliable because of temperature changes drastically effect the test results and the way the component fails. Most of them don't fail until they get hot.
Nov 22, 2011 at 9:18 PM
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HANDY-MAN
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Thanks, It looks like I'll need to buy a manual.

handy-man out!
Nov 27, 2011 at 6:59 AM
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RIVERMIKERAT
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Let us know what you find out.
Nov 27, 2011 at 7:16 AM
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