2019 C43 Sedan, early facelift build. Putting together my list of items to be checked out when I take it in for Service B 20k miles. I swear there are some electrical gremlins (ground issue I'm thinking), but I've given up on chasing them. I've learned to come in with focused, detailed descriptions of the issue, otherwise it's not worth dealer's time either.

That being said, I was hoping if I posted some details and pics here that I might get some valuable insight from the folks here to take in with me.

Soon after I picked up after Service A, I noticed a distinct smell coming from the engine after parking. A friend said it smelled like "antifreeze". I noticed dried white residue splattered over both timing chain covers (where camshaft solenoid adjusters are). Also seemed like coolant in expansion tank was visibly lower than when I took it in. I haven't found any "active" or liquid leaking. Pink coolant does appear to have slightest tint of orange to it with cap off from main reservoir. Also noticed a couple white streaks on backside of radiator (fan side). Finally, timing chain cover appeared to have oil residue coming from bottom right (of driver's side) opening. Hard to see, but almost looks like it could be missing a bolt (unlikely). Any thoughts/suggestions/concerns I should have?

Also noticed engine compartment seemed to be getting dirtier very quickly. Upon wiping, seemed like oil residue was getting in various places and then dirt/dust coating it. One area that concerned me was the connection between intercooler and intake. Also dirtier in back area of engine bay, moreso on passenger side, but just kind of all over, including cables and wires. Nothing abnormal found in air filters or housing (except a small piece of glass!). I noticed on some hose connections (coolant? vacuum?), where it goes from metal to rubber connection there appears to be some kind of odd build up around the seal or connecting point of the metal to rubber, like dirt maybe, or oil/dirt? Finally, I've noticed the coolant temp warms up to operating temp quite quickly, but not over, while oil temp seems to take quite a while to reach operating (S+ mode acceptable) temperature.

Lastly, and most recent, I started hearing a whistle when at WOT appearing at higher RPMs right before each gearshift change (ex: flooring it while getting on the freeway). Oddly, I noticed excess air also coming/pushing from the vents (even though I had AC going at 3 or 4 fan speed). Almost sounded as if it was being "pushed" through the defrost vents. Again, only at WOT higher RPMs before shift change. Also swear I can now hear constant low whistle coming from passenger side vent at various settings. But I also might just be losing it. Car seems to (me) to have slow boost, like a hesitation while it is building up pressure (regardless of drive mode, but exaggerated in C). Also noticed some misfires occur at first startup of the day. No CELs. Scanner will pull some codes (misfires, knock, EVAP circuit low/high, low fuel rail pressure P0087, P0611, P219C,E,F, etc, P2401/2, P054A/C, P0547, P0332/3, P0327/8, and others). And I've repeatedly checked the fuel cap, it's not loose. Thinking possible vacuum leak, or boost leak, or maybe transducer? Maybe all of these things are connected in some way? I just know from previous experience if I don't come with specifics and a direction, or CEL, I get the tried and true "can't find anything, appears normal" answer. But I know it's not, and it's starting to drive me crazy.

Any thoughts, suggestions, ideas, you've heard of this or that before, or just whatever, is very greatly appreciated from me. I'm trying to learn more, and I've learned a lot already, especially that these vehicles can be insanely complicated, but I know the members here are a fountain of knowledge and experience.

Thank you.









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