Fuel system work - RPM Drop

[Porterave]

(06-13-2026 )Rawze Wrote:  there is also some related info...
https://rawze.com/forums/showthread.php?...9#pid12489

hopefully it did not spin a bearing.

After your comment I checked the prefilter for metal shavings. No metal shavings but I found dark brown spots in the prefilter that accumulated in just 2 weeks of changing it, is that possibly related to a faulty fuel pump? (See picture)

Also could a injector fuel line not properly seated causes a RPM dip after a 1 min to 1 min 30 sec? Is it worth replacing them to reseat them?