Jump to content
The mkiv Supra Owners Club

Compression test, number to expect and procedure?


ripped_fear
 Share

Recommended Posts

Hi all

 

I'm carrying out a compression test on Tuesday. Anyone know the correct procedure to complete it out.

 

Guessing its a simple as removing the spark plugs screw the gauge into the chamber and crank the car for a few seconds then leave the dial to settle. Do you have to pull a fuse before you crank it over or is removing the plugs enough?

 

Next question is what numbers would I hope to be finding on each chamber?

 

Thanks

 

Jake

Link to comment
Share on other sites

Fully charged battery, all plugs removed, pull the injector fuse, wedge throttle fully open, crank each cylinder the same number of times (at least 5) I think factory figures are anything over 140psi but I would expect more, can be done cold or hot, you may see slightly better figures hot, if any are low put in a teaspoon of oil in that cylinder and try the test again.

Link to comment
Share on other sites

Superb thanks guys, I have TSRM app but I think its dreadful to find information.

 

Thanks Ricky perfect, just so I know what I'm doing before I try it. Any idea which fuse the injector fuse is? Guessing its in the engine bay fuse box, any idea which slot?

 

Under your engine bay fuse box cap, there is a diagram which will say what fuse is what. Also, the TSRM is available here on our forum rather than that app, and it has the details about what are the minimum levels of compression in it, so I'd reference that.

Link to comment
Share on other sites

Under your engine bay fuse box cap, there is a diagram which will say what fuse is what. Also, the TSRM is available here on our forum rather than that app, and it has the details about what are the minimum levels of compression in it, so I'd reference that.

 

Ok cool if its clearly labelled I'm sure I should be able to find it lol

 

Ive just found it on the app, and it has the psi ratings so thats good to have on me when I do it :thumbs: Cheers

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. You might also be interested in our Guidelines, Privacy Policy and Terms of Use.