Quote from: EcoBoosted-Mks on March 17, 2020, 08:30:22 PM
Hi all, new member to the forum and need some help. I recently bought a 2010 Lincoln mks with the ecoboost engine. This is my first turbo car. Anyway it has 188,000 on the odometer but runs very strong! My issue is that if the car is revved to anything over 2000+ for about 10 seconds or so it will begin to misfire, blick CEL and eventually stay on throwing code's P0300,P0302,P0306. As i let the engine return to idle it will run rough for around 10 seconds or so, then start idling smooth again. I can do this on command and replicate this everytime. I read in this forum that someone else had nearly the exact same symptoms as me with their ecoboost. I'm just wondering if anyone knows the specs on the upstream wideband sensor's so that i can get a reading on them to determine if they are in fact bad. Also just wanted to add that all coil packs, spark plugs and high pressure fuel pump are all new. Any help would be very helpful and appreciated.
That was me, but it was on a brand new block, new injectors, new plugs. For the me issue would come up if i ran the car in manual mode for 10-20 seconds at 3000 rpm, letting off would resolve it after the plugs would dry. For me the issue stopped after a longer break in period.
For you I would suspect the rear injectors. This is a tough one because you cannot pull the plugs fast enough to check for wet tips.
Cheapest options
-check the plugs see if they are filthy.. these engines tend to HHAATTEE gas additives like torx or octane adders, free just costs time and maybe one rage fit with the rear plugs
-check charging system have a parts store check the battery output, and the charge going back into the battery. (free at some places?)
-change the plugs, strictly my opinion no NGK's stick to good old motorcraft oem plugs 60$ +/- plus another rage fit at the rear accessibility for old big handed people
-replace Coil packs 300$
-put the car in the shop and test the injectors and hope you dont get scammed .. cross fingers .. injectors are frigging expensive