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I’ll pull everything apart tomorrow to check. I gave a quick look over this morning, pulled around on the intake tube and vacuum lines to see if it ran any different. I’ll update if I find anything tomorrow.

I also cleaned the maf and throttle body.

I sprayed around all the vacuum lines I could find to see an if there was an idle surge and couldn’t find anything. The rattling is loud, sounds like it’s coming from the engine, but only once the engine reaches 3k or above, but no rattle at idle.

2003 Lincoln ls 3.9 199k It’s been slowly losing power, power drops off at 3k. Now barely runs + fuel smoke from running rich. The following codes have been thrown: P0190, p2196, p2198, p0300. I believe it’s having a fuel issue or timing issue. Replaced, the fuel pump, replaced plugs...