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So, it turns out I didn't know how to do a leak down test properly. I was following the instructions for good leak down testers that have an orifice between the two guages, on a cheap leak down tester that does not. Got the following results, and repeated the test a few times to ensure I wasn't...

That's because you need to use the special EGR tube disassembly tool

I'm not kidding when I say I've got it down to like 15 minutes on my setup. It's 7 10mm bolts, two screws, one hose clamp, and a bunch of connectors. I have a focus ST intake mani using the Damond adapter which simplifies it a lot. Gen2 as well so no PS pump. 0. get under car 1. loosen the hose...

Thanks for the luck, I think I'm gonna need it lol. At this point I am convinced it is genuine predetonation knock, versus engine bay noise. Everything is pretty meticulously wire/ hose managed, and the knock is non-existent at turbo spring pressure, acceptable on my first revision (1.5 max)...

It's not over yet. Replacing the injectors did make a lasting difference, but as soon as I got my next revision from Will, things started getting dicey again. Then, he sent me a followup tune with a fuel taper, which I believe will slightly lean out the mixture towards redline. This should make...

Good question.

Jesus christ. It was one of the injectors. Check out this 4th gear 3k-7k WOT log, that is night and day. Repeated across a few pulls. Finally I can continue the process with Will @ PD. Yay. Not entirely sure how to feel right now. Elated that my car can get tuned now. Less than thrilled that...

I have a second set of recently serviced injectors on hand, so no cost involved there. I was going to try swapping them in earlier, until I found my leaking injector #3 and decided to leave them alone as I was blaming the seals at the time. I have no access to E85, just the E10 that we have at...

Sigh. This is getting pretty depressing. Damond motor mounts - no improvement Swapping out injector 4 - no improvement Brand new set of overspeed seals - no improvement I honestly think my last update was a fluke. Sometimes it only registers between 2 and 3 degrees after a pull, but most of...

I have made some progress on this and figure I might as well share to the class. I ran out of hair to pull and started yanking my injectors out with the intention of swapping out #4, the one which appears to be leaking from inside the connector. Last time I blasted the connector and receptacle...

Thanks for your thoughts. I actually made a note in my phone to try a pull at partial throttle to see if it's load or RPM related. Will probably give that a try this evening. Also may try holding the clutch pedal in slightly during the problematic area to see if it's related to my throwout...

Hey all, long time lurker first time poster. I pride myself in being a pretty good automotive troubleshooter, but this issue has been absolutely kicking my ass on my fresh engine and setup. I need the help of the MPS hive mind. ENGINE/DRIVEABILITY Year/Make/Model: 2010 USDM Speed3 Mileage...