I'm hoping to get some help with what I found to be my 300SD injection pump is significantly off timing.

Some background; When I got the car, the timing chain was new, however the previous owner never removed the metal from the failed Vac pump, and this subsequently damaged the new chain. I discovered that when the previous owner was installing a new chain, the jumped a tooth on the valve sprocket. When I installed a new chain I realigned the marks on the sprocket/tower with TDC. It was previously ~18 degrees before TDC. I immediately had concern about the IP timing.

Brushing up on some scattered info online, I got the idea that the first port should flow around 60 Degrees and shut of around 24? I removed the fuel lines from the IP, but did not remove anything else on the pump. Do parts need to be removed from the #1 valve on the pump for a drip test? I soaked up the fuel from the top of the #1 IP stem. I noticed fuel began to well up in the stem around 30-40 before TDC. I soaked up the fuel at 30 Before-TDC, and continued to crank. The fuel welled up again in the #1 stem, until the fuel kinda popped and stopped around 0-5 before TDC.

It seems to me like the IP sprocket has skipped a tooth on the chain, and is no longer timed correctly. How can I get my timing back to where it it should be?


Side Note: When I pump my hand primer, it dumps fuel out of the braided fuel return line for the injectors. Do I just plug this line? I still can not get the fuel stems to drip when I pump and any point on the crank.

Thanks for any help!