How do you peform compression test with TMIC still on?

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How do you peform compression test with TMIC still on?

Postby QIK_GT4 » Sun Sep 18, 2005 1:22 pm

Would you only do the compression test on the spark plug closest to the timing belt? because that one seems to be the only one accessable when TMIC is still on?

I tried it today to run engine when TMIC was off, car starts and stalls lol how dumb of me....
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Postby Gary » Sun Sep 18, 2005 2:19 pm

You don't run the engine when you do the compression test.
You only crank it, and the TMIC must come off.
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Postby QIK_GT4 » Mon Sep 19, 2005 3:11 am

crank it and let it cut out right?
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Postby SuperWhite92 » Mon Sep 19, 2005 3:18 am

crank it until the pressure reading becomes stable, then stop cranking it, read the pressure, and write it down. Replace that spark plug and move to the next cylinder.
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Postby st185uk » Mon Sep 19, 2005 5:54 am

The BGB states to remove all the spark plugs and then do the compression check, oh and to do it with engine at normal temp. so wear gloves.!!!!!
minimum is 128psi..

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Postby Rick89GTS » Mon Sep 19, 2005 6:31 am

^And don't forget to pull the EFI relay or fuse. :)
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Postby st185uk » Mon Sep 19, 2005 6:53 am

Rick89GTS wrote:^And don't forget to pull the EFI relay or fuse. :)


i didnt do that and it doesnt say to do that although it does say remove cold start injector and disconnect solenoid resistor, but i guess removing the efi fuse stops it from squirting the fuel into the cylinders, which is a good idea as with no plugs in it it sprays.!!!!
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Postby Rick89GTS » Mon Sep 19, 2005 2:54 pm

^I do that cuz pulling the EFI relay is a lot easier than removing the cold start injector! :wink:
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Postby suprakid95 » Mon Sep 19, 2005 5:15 pm

i pull the EFI relay as well 8)
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Postby Aracheon » Mon Sep 19, 2005 6:58 pm

Typically, the compression stabilizes after about 6 cranks or so. On my Integra, I disconnect the fuel fuse and the ignition coil before cranking it.
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Postby muneo » Tue Sep 20, 2005 12:03 am

Make sure to do both dry and wet test. This way you can tell what kind of condition your piston rings are in.
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Postby ChrisD » Wed Sep 28, 2005 8:54 pm

Unplug the plug to the coil as well. No need to have those leeds live with 30,000 V trying to jump somewhere!
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Postby Stubble » Thu Oct 20, 2005 3:49 am

Step on the accelerator as well while cranking. I read an extra couple of psi when I did this, and the BGB confirms this is the correct procedure. All spark plugs out.
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Postby QIK_GT4 » Fri Oct 21, 2005 2:10 pm

Stubble wrote:Step on the accelerator as well while cranking. I read an extra couple of psi when I did this, and the BGB confirms this is the correct procedure. All spark plugs out.


this is an interesting one lol...
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Postby fsmtnbiker » Sat Dec 17, 2005 7:59 pm

And that is the correct way - The throttle body should be open. EFI fuse or Fuel pump relay should be disconnected. All 4 spark plugs should be out. Battery should have a full charge.

You aren't trying to start the car while you're doing this...
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