Testing procedure and ohm reading for the distributorless coil

Tiny
HANDY-MAN
  • MEMBER
  • 1999 FORD EXPLORER
  • 150,000 MILES
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.
Do you
have the same problem?
Yes
No
Monday, November 21st, 2011 AT 8:22 PM

5 Replies

Tiny
RIVERMIKERAT
  • MEMBER
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.
Was this
answer
helpful?
Yes
No
Monday, November 21st, 2011 AT 8:28 PM
Tiny
HANDY-MAN
  • MEMBER
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
Was this
answer
helpful?
Yes
No
Tuesday, November 22nd, 2011 AT 9:09 PM
Tiny
WRENCHTECH
  • EXPERT
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.
Was this
answer
helpful?
Yes
No
Tuesday, November 22nd, 2011 AT 9:18 PM
Tiny
HANDY-MAN
  • MEMBER
Thanks, It looks like I'll need to buy a manual.

Handy-man out!
Was this
answer
helpful?
Yes
No
Sunday, November 27th, 2011 AT 6:59 AM
Tiny
RIVERMIKERAT
  • MEMBER
Let us know what you find out.
Was this
answer
helpful?
Yes
No
Sunday, November 27th, 2011 AT 7:16 AM

Please login or register to post a reply.

Recommended Guides