QUOTE(Mark Henry @ Feb 18 2021, 04:23 PM)
Thanks Jeff, I see Chris' kit also has a couple of O-rings and a gasket.
I'll dig into it but I'll just order a kit.
more than likely its torn, it might just be a small tear, so will run but not well. even hold vac fine . someone recently had this happen, had a couple they opened up, both had diaphragms torn but held vaccuum. I would order 2 kits, rebuild 2 so you have a spare. the paper gasket and the o-rings will make sure you have a good seal once rebuilt with new diaphragm.
i have 3 operating MPS right now for my 75 2.o d-jet. One was rebuilt by Jeff B for me and tuned then tested i believe on his car. In comparison to my one that i now have dialed in, that one still runs a bit lean. in fact every one i have ahd in my car or that was tuned to factory spec was too lean and had to be adjusted. but every car is different.
Phil