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Old 01-13-2013, 10:26 PM   #1
Kiwi_Camaro_2010
 
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Drives: Camaro 2SS/RS 2010 L99
Join Date: Jul 2012
Location: New Zealand
Posts: 135
Compression test on Camaro 2010 SS

Hey Guy's, just wanted to do a compression test on my car, as i had some detonation when my cats blocked up. I knew what to do on the older engines with removal of plugs & ignition circuit & test with WOT. But how is it done with new electronics? What do I disconnect on ignition side, do I just unplug coil packs & that's it? Will throttle still go WOT with disconnected coil packs & will starter still work with these unplugged?
Since gutting my cats, my idle has gone a little rough at idle (500rpm) where as before it was smooth as, or is this just because I have gutted cats & everything flowing better?
Any help appreciated,as prefer to get advice before I play.
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Camaro 2SS/RS 2010 / L99 / Whipple SC /Dynatech Headers & Catts (gutted), ID 850 injectors, ZL1 fuel pump +BAP & ADM pump controller, ZR1 3Bar MAP, Dual Catch Cans, 91 octane ,Eibach sway bar kit , Driveshaft loop, oil cooler delete, ADM dual gauges (AFR/Boost) LC1 wideband controller, D/D, ARP stud kit ,Callies forged dragon slayer crank 3.622", callies ultra rods, wiseco forged pistons, L99-LS3 conversion, rollmaster double row steel timing set & comps cam timing cover,smooth idle blower cam kit. LS9 head gaskets. Texas speed custom oil pump. Asm by me, no one else to blame!!
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Old 01-13-2013, 10:55 PM   #2
blue-bayou
 
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Drives: 2010 IBM SS/RS/Stick
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I recently did a compression check and as far as memory serves, I removed all plugs, unplugged injectors, and turned motor over while holding gas pedal to floor. I do know, however that throttle will not open all the way. It is possible to unplug throttle body and manually hold throttle blades open while someone else turns motor over.

FYI-mine came in around 190 psi
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Old 01-13-2013, 11:17 PM   #3
Kiwi_Camaro_2010
 
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Drives: Camaro 2SS/RS 2010 L99
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Location: New Zealand
Posts: 135
Quote:
Originally Posted by blue-bayou View Post
I recently did a compression check and as far as memory serves, I removed all plugs, unplugged injectors, and turned motor over while holding gas pedal to floor. I do know, however that throttle will not open all the way. It is possible to unplug throttle body and manually hold throttle blades open while someone else turns motor over.

FYI-mine came in around 190 psi
Hey thanks for that, yep forgot bout injectors, wouldn't want them going as well, I might try unplugged coil packs & injectors & remove air intake to make sure throttle blade is open. I see your manual so mine should come in a little lower psi then being auto.
cheers
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Camaro 2SS/RS 2010 / L99 / Whipple SC /Dynatech Headers & Catts (gutted), ID 850 injectors, ZL1 fuel pump +BAP & ADM pump controller, ZR1 3Bar MAP, Dual Catch Cans, 91 octane ,Eibach sway bar kit , Driveshaft loop, oil cooler delete, ADM dual gauges (AFR/Boost) LC1 wideband controller, D/D, ARP stud kit ,Callies forged dragon slayer crank 3.622", callies ultra rods, wiseco forged pistons, L99-LS3 conversion, rollmaster double row steel timing set & comps cam timing cover,smooth idle blower cam kit. LS9 head gaskets. Texas speed custom oil pump. Asm by me, no one else to blame!!
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