Question about 1988 Ford F 150

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1988 302 f-150 #5 cyl. not registering on compression test

1988 302 in a 1995 f-150 . . .engine began missing , ran a compression test on cyls. 1-4 . when I hooked up compression gauge to #5 , it failed to even register on guage and engine turned over much more freely than the previous 4 . Does this mean that the piston is not going thru its syroke at all ?

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  • 24 Answers

Could be a broken rod that has left the piston up in the cylinder somewhere and not moving or there is a very large hole in it. With a spark plug out can you get a long screwdriver in there and push on it so see of the piston moves. Either way it sounds like a rebuild is in your near future.

Posted on Nov 05, 2012

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Posted on Jan 02, 2017

keemo68
  • 1263 Answers

SOURCE: 91 Ford Ranger

first the bleeder will be located on the cylinder that is mounted on the transmission to engine connection by the bell housing. Second the port for this is located along the drivers side under the hood either by the fire wall or along the top of wheel well it will be marked with a grey cap labled EEC.

Posted on Aug 29, 2008

  • 1 Answer

SOURCE: no compression in one cylinder

Timing belt slipped around cam pulley. Take off your timing belt cover and check the position. This would explain misfiring and compression loss. Stretched belt or missing cogs in belt likely culprit.

Posted on Feb 04, 2009

  • 334 Answers

SOURCE: no compression on cyl 2,3,4, 90 pounds on cyl 1 timing marks line up engine will run but backfires runs poorly can't drive

it sound like your timeing is out 180 drg. pull your disterder and trun 180 . make shore number one pistion is tds on the fire stroke. it allso like your ring are bad or your valve are not closeing all the way. good luck

Posted on Apr 17, 2009

SOURCE: 1999 f250 5.4 cyl 5

If you got a PO305 Code Replace COP Coil #5
You don't need a dealer
You will be doing a lot of them,as time goes by.

I get so frustrated with this dealer thing.
I have a Lincoln LS, that is by far the most complicated vehicle ford ever dreamed up.
I have done 2 coils this year,at $59.00 each.
Some people on this site, are up to $5000.00 at the dealer, and not had one issue repaired yet.

If the misfire is real bad ,you may have to walk the new coil from one cylinder to the next until you get the offender. In that senerio,the PO 300 Codes won't always work.

Let me know how your doing. Please do your own work. Your dealer proved to you, they can't help you.

Posted on Sep 23, 2010

  • 4369 Answers

SOURCE: I have a 2001 ford

Codes say Cylinder 4, 5 & 6 are not firing. This could be a spark issue or a fuel issue or a mechanical engine failure. Is compression zero? Did they use a compression tester?

Posted on Aug 02, 2011

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