\'85 Q-Jet power piston ??? My carb is a M4ME with the dual accelerator pump setup. I may have finally diagnosed the cause of an overly rich condition that caused me all sorts of grief on the way to B'Bash and back (again, thanks to fisher1648, Storm Trooper, and BigBlue76 for your help to get it to run right): the plastic retainer on the power piston doesn't seat right, allowing the spring to push the piston too far up. Result is the piston is stuck in the up position, essentially pulling the primary metering rods out of the main jets all the time - so it's running rich all the time, and mileage is down the dumps, you guys don't want to see my fuel bill for B'Bash! /forums/images/icons/laugh.gif My question is: can the power piston be taken apart? Edelbrock sells the retainer, so I ordered it, together with power piston springs and a few different jets (cause I'd like to try and get a bit better mileage after I fix the power system). Of course, now, after looking at the piston, I'm not sure how to install the new retainer. The piston has a cross pin, but I'm not sure whether that's the secret to taking it apart so I can get the plastic retainer on the 'collar'. Roe's Q-Jet book is mute on this one, so if anyone has any info, it's greatly appreciated, thanks, michael.