Yeah, I really hate doing fuel system work on a vergasser. Despite having the fire extinguisher handy at all times, I always worry about something bursting into flames…
-D > On Apr 27, 2017, at 9:56 PM, Curley McLain via Mercedes > <mercedes@okiebenz.com> wrote: > > Good work! I am glad I dumped my vergassers before I had to do stuff like > that. > > Diesel on. > >> Dan Penoff via Mercedes <mailto:mercedes@okiebenz.com> >> April 27, 2017 at 8:41 PM >> As the weather forecast is saying it’s going to be hotter than heck this >> weekend, I figured I would go ahead and take a swing at replacing the air >> meter boot and injectors on the 300SEL when I got home today. >> >> I started around 5:00 and finished around 8:00. It wasn’t a difficult job, >> just a lot of fiddly stuff. >> >> I pulled the fuel distributor/air meter as a complete assembly, including >> the injector lines. Buy removing the wiring harness gutter I could lift the >> whole thing, lines and all, off the engine without a lot of effort. This >> went a long way in cutting down disassembly/reassembly time and also reduced >> the possibility of getting dirt in the injection lines. >> >> The boot was intact and undamaged from what I could tell when I removed >> everything. So it was probably not my vacuum leak source. I replaced the >> hoses from the manifold to the idle air valve and on to the air meter >> housing as well. And yes, Peter, even with everything out of the way getting >> the hose on the intake manifold was a real PITA…. >> >> Pulled all of the injectors, O rings and plastic shields/housings. Nothing >> obvious wrong here other than the shields being really sooty or black. I’m >> not sure if that’s normal or not. Cleaned the injector bores in the head. >> Installed the new shields, O-rings and injectors. >> >> Got the fuel distributor/air meter back on. Holy mother of pearl, getting >> the boot over the throttle valve was nothing short of a major undertaking >> and not something for those who are easily frustrated. Put the injector >> clamps and bolts in place, torqued everything and reconnected the injection >> lines. Reconnected the main fuel lines and fired it up. >> >> Amazing. Idle is amazingly smooth. I can only suspect that the injectors >> that were in the engine were slobbering or had bad patterns. Acceleration is >> smooth, smooth, smooth as is cruising at speed. I test drove about 10-12 >> miles and saw no change in the fuel level, so with the previous MPG being in >> the 10-12 mpg range I’m hoping things are much better with the new >> injectors. Vacuum is on the far left at idle, no indication of a vacuum leak >> from what I can see. >> >> One observation: I didn’t disconnect the fuel pump to relieve pressure on >> the fuel system before I started. When I cracked the supply line, I didn’t >> get sprayed with fuel - it pretty much just dribbled out. With this in mind, >> am I correct in assuming the check valve at the pump/filter is bad? You do >> have to crank it for a few seconds when it’s been sitting, so that makes >> sense if it is bad… >> >> I’ll drive it this weekend and see how the fuel consumption goes. Hopefully >> it’s far better than it has been. >> >> -D > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
