This is a discussion on Engine Sputter within the Focus RS Discussions forums, part of the Focus RS Forums category; Originally Posted by ssstevieb Still don't have it back. When I get it I'll report back with the part number etc Sent from my iPhone ...
I had an intermittent sputter on cold starts after the HG fix. It eventually threw a CEL for multiple misfires on startup. a certain amount of misfires is allowed before the CEL comes on but this was more than that threshhold I guess. It turned out to be a faulty injector. The injector was replaced after the dealership spoke with Ford engineering.
Anyway that was done in the summer and the car started smoothly up until recently when it started to sputter a few times on startup again. Not enough to trigger the CEL though. I thought "oh no not again!" I normally use Shell VPower gas but I read somewhere about possible problems with EcoBoost engines and Shell winter blend? Interestingly, I switched to Petrol Canada gas for the last 4 fill ups and the sputters have stopped.
I guess i should take my car in. May upload a video to see what you guys think.
I use 91 octane. I've read mixed reviews of Petrol Can 94.
HUSKy 94 boom problem solved
So this engine will only run properly on a certain brand of gas?
SG RS2 17
2017 NB RS1
Engine: Radium CC's & Plate, Boomba BPV, Mountune SSC & Filter, SteamSpeed IC & Piping
Suspension: Mountune springs, Massive Rear Camber/Toe Arms, Whiteline Rear SB & EL, Powerflex Front LCA Bushings, FA 500's (Raised 40mm by FA)
Brakes: Rotora 2pc Rotors (15lbs), Mountune Street Pads, RBF 600
Shoes: Volk CE28n 18x9 +38 (16lbs), 4S 265x35r18's
Body: Xpel front Wrap, Satin black Roof / Mirrors, Boomba SS Lever, SS Arm, solid bushings
T.B.I.: Shorai Battery, Turbo Blanket