1994 Ford Probe

1994 FORD PROBE
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SNOWMOGOER
  • MEMBER
  • 1 POST
Hello I have a 1994 ford probe and I got a electronic diagnosis and they told me that cylinders 4 and 6 only have 55% compression.I wanted to know what could be making those cylinders loose compresion.The place wear I got the test said that it could be many things.And that did not help me at all.So if anybody can help me with what the problem is or could be please e-mail me and I would sure appriciate it. THANY YOU


snowmogoer@yahoo.com
Jan 1, 2006 at 6:02 PM
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GODBEAR839
  • ✓Experienced Mechanic
  • 77 POSTS
It could be for any one of a dozen reasons bad rings scored cylinder walls bad head gasket leaky valves ETC. you should be able to figure out which it is thoght fairly easily head gaskets are very obvious as you get oil in the water or worst water in the oil. Any of the others a good mechanic can figure out.
Jan 6, 2006 at 3:15 AM
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BMDOUBLE
  • ✓Experienced Mechanic
  • 1,139 POSTS
The best way to find out would be to do a cylinder leakdown test to find out where the pressure is going, in the crank case, intake, or exhaust.
Mar 13, 2020 at 2:51 PM
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Suggested Repair

Perform a cylinder leakdown test on cylinders 4 and 6 to determine where compression is escaping (crankcase, intake, or exhaust). Possible causes include worn rings, scored cylinder walls, a bad head gasket, or leaky valves. Check for oil in the coolant or coolant in the oil, which would indicate a head gasket problem.

Conversation Summary

The owner of a 1994 Ford Probe reported an electronic diagnosis showing cylinders 4 and 6 at only 55% compression and asked what could cause the loss. Experts said possible causes include bad rings, scored cylinder walls, a bad head gasket, or leaky valves, and recommended a cylinder leakdown test to locate where the pressure is going. A head gasket issue may be indicated by oil in the coolant or coolant in the oil.

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