1987 Ford Ranger

Tiny
JOHNLYLE1
  • MEMBER
  • 1987 FORD RANGER
Engine Mechanical problem
1987 Ford Ranger 4 cyl Two Wheel Drive Manual

the car has a bad missing problem, number 2 cyl seems dead. Replaced spark plug wires and plugs. Seems to have compression, but I don't know. Took valve cover off everything seems ok. Please advise.
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Thursday, January 22nd, 2009 AT 11:38 PM

3 Replies

Tiny
RASMATAZ
  • EXPERT
Check the engine compression wet and dry tests an get back with the readings
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Thursday, January 22nd, 2009 AT 11:45 PM
Tiny
JOHNLYLE1
  • MEMBER
Compression on number2 is only 20 lbs, suspect burnt valve.
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Friday, January 23rd, 2009 AT 12:21 PM
Tiny
OBXAUTOMEDIC
  • EXPERT
Hello,

IS IT THE RINGS OR THE VALVES?

If compression is low in one or more cylinders, you can isolate the problem to the valves or rings by squirting a little 30 weight motor oil into the cylinder through the spark plug hole and repeating the compression test. The oil temporarily seals the rings.

If the compression readings are higher the second time around, it means the rings and/or cylinder is worn. No change in the compression readings would tell you the cylinder has a bad valve.

.
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Friday, January 23rd, 2009 AT 12:26 PM

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