Help! Car Idles Rough, Won't Accelerate, Service Engine Soon Light Flashes, Code P300

Chuck33079

Midas? Problem found. They might be one of the few shops worse than the dealer monkeys.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

NeoNz

To their credit, Midas was actually helpful.

Changed my Pre-cat o2 sensors and that still didnt solve the problem.

The manager thought about it, and figured out it could be a fuse. Traced the O2 heater and O2 sensor fuses back to the engine bay and it turned out to be a mini 15 amp fuse that was blown. after that was fixed, boom problem solved for now. I will drive it around a few hundred miles and run the codes to ensure they are solved. As of now i have the old downstream O2 sensors in, i'll see if that is a problem still.

What a pain to get to that fuse box, its next to the battery and you have to remove your windshield cowl to get to it. Just happy this is fixed now, the fuse must have blowl when i went into limp mode when the vacuum line fell off, (midas screwed that up)

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2012 G37x, K&N Intake, FI RHFC, 13.9 @ 100(Daily)
2008 Corvette LS3, B&B Exhaust, 12.3 @ 116