Compression check

[Fmaitland]

What is the proper way to do a compression check and what is the acceptable range for a 95 3.2L SHO? I borrowed a compression checker from a friend but it has a flexible hose so I really cannot trighten it very well. The 3 front cylinders were left to right approximately 145, 120, 135. Which seems low to me but I'm not sure of the procedure.
Thanks,
Fred

 

[fredhurderjr]

Fred -
That's very low compared to readings I've gotten before.

My readings on my 91 were between 190-210 when taken about 2 months ago.

I called your house this morning, and got your work #; I'll call there about 9am. To answer your message, they are all together - all or nothing.

 

[bigdoggee]

I've got a 94 3.2L and your numbers are way below what I got when I tested....

REAR
240 240 240

235 255 240
FRONT

A couple of things…. You may want to make sure you are using the right hose/link that screws into the cylinder. Also, since these engines have a lot of compression it may be possible that the seal in your compression tester went bad. I know when we tested mine we had to install a new gasket due to the high compression shredding the gasket that was in there.

 

[poissonverte]

Anyone got a good procedure for doing this?? I checked some other lists for other cars to get an idea. Ie stick compression thing in spark plug well crank car with the DIS disconnected so it wont start and keep cranking??

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93 ATX
124K

MODS: 4 slicers, 2 stickers, license plate, fog lights, moonroof, cd player, rear spoiler.

Next MODS:
Sitting in their respective box

 

[SHOspeed93]

How and what tools are needed to do this?....
Tony

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93 Green ATX
DYNO results 197 torque and 175 hp at the wheels
246 torque and 218 hp at the crank
Eibach Springs, Strut Tower Braces
2 Chambered 40 Series Flowmasters
K&N Air Filter, Boxless
and Five-speed shift **** conversion
And a new trans, Indilgo Gauges
SHOcago Member
AIM: SHOspd93

 

[SHOTIME]

Need to pull the plugs, and need a compression checker.

Can get them at most autoparts stores..

Just a pressure gauge with a hose and a fitting for the plug threads.

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Eric
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New England SHO Specialists