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Old 08-08-2019, 05:09 PM   #1
Scooby Newbie
Member#: 206215
Join Date: Mar 2009
Chapter/Region: NESIC
Location: MA
2005 9-2x Aero

Default 05 WRX Leakdown test issues

I have a blinking CEL misfire that was showing all cylinders and now only showing 4. I'm trying to diagnose the issue.

I'm trying to perform a leakdown test, I got the engine to TDC (via Cam markings) and when I turn up pressure(to 70psi) it just rotates the engine. So I tried holding the crank pulley bolt steady with a ratchet and when I hit about 60psi it just unscrewed my crank bolt. Either way, the leak down tester was showing 100% leakdown the entire time and I can hear air pissing out the entire time.

I made sure I was on compression stroke

I made sure my hose is seated snug into the cylinder

No matter what, air is pissing out from somewhere around the cylinder when I'm turning up pressure.

Can someone tell me what I'm doing wrong?
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