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EM2Y 60HLP whats compressers are the same - Cars & Trucks

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My jaguar x type not got compression had pugs,coils, and injections checked, had 2 mechanics look nether know what it could be


if you have no compression then that means that the pistons are not compressing the air fuel mixture on the compression up stroke
This means several things
valve not seating or sealing ---bent valves
valves not opening --- broken chain/belt
rings broken-- holes in pistons
badly warped head/s and destroyed head gasket/s
check to see if the cam shaft/s is turning,
have a compression test ( dry and wet ) done by an accredited mechanic-- mechanics that do not know why there is no compression may not be mechanics ---to see exactly how much compression you have and on what pistons.

May 14, 2015 | Jaguar Cars & Trucks

1 Answer

What is the minimum compression for a ford 390 engine.


No idea or where to find that

I had a 390 in a 1967 T-Bird

I kept no record on that, but think
I had about 160 lbs,somewhat less
than my 365 Vette

Today you forget compression & do cylinder
leak down testing & compression is what it is

Aug 15, 2014 | Cars & Trucks

2 Answers

What is compression leak


Compression is what happens when the piston comes up and compresses the fuel/air mixture. Then the spark plug ignites it and the explosion drives the piston down in turn, turning the Crankshaft in turn making the car go. A compression leak is when this compressed fuel/air mixture is escaping from the combustion chamber.. This can happen 3 ways. 1. Bad piston rings, 2. Blown head gasket or cracked head or block, (usually caused by overheating), Or the least costly.. loose spark plugs.

May 16, 2014 | 1999 Cadillac DeVille

1 Answer

What is the Compression supposed to be for a 1987 Toyota Pick up 22R with carb, 4 cyl.???


A new engine would be about 180 psi for each cylinder. As the miles add up and wear occurs, compression will get lower. The important thing is that compression is even and balanced-lowest compression reading should be within 75% of the highest cylinder's compression. Some Toyota engines had a minimum allowable compression of about 135 psi, but if compression is balanced, you could have average compression as low as 125 psi and engine would still run good, some loss of power but still acceptable, and oil consumption would not be that bad.
If cylinder compression is below 120 psi as an average, you should be looking into a rebuild event-rings and valves need attention. If any cylinder is below 100 psi, it may not even fire, certainly will produce no power, and could be a head gasket failure, very worn rings, or valve problems.
Remember the important thing is to find compression readings that are very close to each other. I have an '87 Sentra with 75,000 miles(true!)-lowest comp. is 160, highest is 165 psi-runs great, good power. Also a '79 Datsun pickup (with god only knows how many miles-about 200,000 maybe). Compression is about 125-135 psi, fairly well balanced-noticeable loss of power, very little oil burning, still runs fair to good-dependable, at least.
That should give you an idea of what to look for. Good luck.

Aug 29, 2013 | 1987 Toyota Pickup

1 Answer

Loose compression engine


Not sure what loose compression is, but low compression would not be affected by changing the plugs unless the wrong plugs were installed.
The timing belt may have broken, but again that would not be caused by replacing the plugs. I would run a compression test to verify the problem.

May 29, 2013 | Mazda MPV Cars & Trucks

1 Answer

What is the cyls. Compression on 96 nissan maxima 3.0


Normal compression is around 125 psi per cylinder - - the real number is what the average is for all 6 with less than 20psi difference.

Sep 30, 2012 | Cars & Trucks

1 Answer

98 honda accord v6 only has 90 psi compression


90 psi compression is the minumun for gas engine to ignite, you have low compression what is the compression next to it? The compression on Honda V6 is 200psi. you can have a valve problem a blown head gasket, Also make sure your compression gauge is accurate by using another compression gauge

Mar 23, 2012 | 1998 Honda Accord

1 Answer

1998 dodge 318 5.2L compression


when you do your compression test squirt some oil in the cylinder through the spark plug hole first then check compression if you have compression then its rings. If still no compress you might have worn off cam lobes.

Feb 04, 2012 | 1998 Dodge Dakota

2 Answers

There is no compression on one of the cylinders, what is solution? My auto is 2000 gmc jimmy, has new plugs, wires, etc. computer shows misfire. Help!



  • Hi, I can offer some answers to your question.
  • Well a few things could be going on here for no compression.
  1. You could have a hole[s] in that piston.
  2. Could have a busted compression ring.
  3. Broke or bent Push Rod.
  4. Carbon buildup under one of the valves.
  5. Broken exhaust OR intake valve.
  6. Could have burned up that exhaust or intake valve.
  7. Could have a hole in that cylinder wall.
  8. Valve spring.
  9. The valve spring keeper might have feel off.
  10. Could have snapped the connecting rod.
  • You say you have no compression in one of your cylinders. What did the compression test show? Or what is leading you to believe you have no compression?
  • There is a difference between a miss fire and no compression.
  • A misfire would more than likely throw an error code.
  • Do you have the actual code?

  • Please let me know what the code was as a miss fire can be many things. But actual no compression in one cylinder would be caused by one of the things I listed above.


  • Hope this helps and thank you for using FixYa.

Regards, Tony

Aug 18, 2011 | 2000 GMC Jimmy

1 Answer

Compression check


The compressions you mentioned...Good?
No. Not at all.
Those compression reading indicate either really bad/worn piston rings, or valves that are not sealing properly, or both.
Normal compression readings should be at or above 140 PSI, +/5 5 PSI difference, no more.Save your money, and look for another unit. This engine is going to cost you a lot of money to make it right.

Mar 17, 2009 | 1989 Toyota Pickup SR5

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