I have a slight miss in one cylinder. I know it is not a full miss (you would really feel that) but I have been chasing this down for almost a year.
1st thing I did was change over IPs as I had another handy. No change.
I then pulled the Injectors and had them tested, they were all relatively fine.
When pulling injectros though I noted that my number two seal ring was almost burnt through aruond the bottm of th einjector...
That'swhen I started consideringthis issue.
I'll let ya all know what I dfind if I get to it this weekend.

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'99 S420 - Mommies
'72 280SE 4.5 - looking to breathe life into it
'84 300SD Grey - Sold
'85 300SD Silver - Sold
'78 Ski Nautique