If the primer pump is bad it’s DOA no matter what due to air getting into the system or no fuel flow.
As I recall, when these fail the engine will not start. Is it possibly the original “mushroom” style pump with the white plastic knob that you have to unscrew to release it or the updated version with the black (fixed) knob? If it’s the original version I would change it to the updated pump on principle. -D > On Mar 15, 2023, at 9:53 AM, Andrew Strasfogel via Mercedes > <mercedes@okiebenz.com> wrote: > > My 1985 300SD was running fine until I drove it onto the sloping driveway, > with the car facing uphill. Now it won't start. It attempts to fire but > isn't receiving fuel. I have ruled out the fuel filters and glow plug fuse > and relay (the pre glow light functions normally). > > Could this be a lift pump problem? > tinyurl.com/2624bc78 > Or a defective primer pump? Something else? > > Andrew > 1985 300SD cabernet red > _______________________________________ > 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
