Really could use some help. Here’s the gist of work that was completed Friday before I noticed the CEL came on Saturday...
Stainless Works long tube headers
Ford intake manifold (ported) for 2018+ GT
JLT Performance CAI
Ford Racing EV6 fuel injectors
MMR lightweight billet aluminum 3-bolt water pump pulley
Reische Perfromance 170° thermostat
JLT Perfprmance air-oil separator
HP Tuners inferred flex-fuel tune
Got codes P0305 & P0300, so #5 Cylinder Misfire.
I’m not sure how long the CEL was on before I noticed it, but I probably worked the engine pretty hard after it came on because hey, more power! I hope I’ve done no harm. The car also exhibited a weird occasional “thump” under light steady throttle in high gear, almost like it went over a small bump but there weren’t any. Makes a faint sound and I could feel it too.
Bad plug? Ignition coil? Any idea of what might’ve caused this vis a vis the tune and mods? I doubt it’s a coincidence. I’m at 15K miles. 2017 GT.
I’m going to call the speed shop first thing tomorrow, but wanted to tap into the knowledge here before I speak with them. Thanks!
Stainless Works long tube headers
Ford intake manifold (ported) for 2018+ GT
JLT Performance CAI
Ford Racing EV6 fuel injectors
MMR lightweight billet aluminum 3-bolt water pump pulley
Reische Perfromance 170° thermostat
JLT Perfprmance air-oil separator
HP Tuners inferred flex-fuel tune
Got codes P0305 & P0300, so #5 Cylinder Misfire.
I’m not sure how long the CEL was on before I noticed it, but I probably worked the engine pretty hard after it came on because hey, more power! I hope I’ve done no harm. The car also exhibited a weird occasional “thump” under light steady throttle in high gear, almost like it went over a small bump but there weren’t any. Makes a faint sound and I could feel it too.
Bad plug? Ignition coil? Any idea of what might’ve caused this vis a vis the tune and mods? I doubt it’s a coincidence. I’m at 15K miles. 2017 GT.
I’m going to call the speed shop first thing tomorrow, but wanted to tap into the knowledge here before I speak with them. Thanks!