2013 LFX “bog” or stumble - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

67-LS1 · 06-08-2025, 07:44 PM

I’ve got a 2013 LFX in my 66 Chevelle. It’s been sitting for awhile and now that I’m driving it again it seems to have developed a bog of flat spot in the acceleration. It’s most noticeable when the auto trans shifts up a gear under mild driving conditions..
Any guesses as to what the issue might be?

xstuntman · 06-10-2025, 02:15 PM

Stumbles usually are from air or fuel being incorrect but in your case it might be stale gas if sitting a while.

After that I would be looking at TPS, MAF, oxygen sensor, vac leak, faulty spark plugs. Other options are fuel injectors or plugged exhaust.

06-08-2025, 07:44 PM	#1
67-LS1 Drives: 1966 Chevelle Join Date: Oct 2013 Location: Northern California Posts: 142	2013 LFX “bog” or stumble I’ve got a 2013 LFX in my 66 Chevelle. It’s been sitting for awhile and now that I’m driving it again it seems to have developed a bog of flat spot in the acceleration. It’s most noticeable when the auto trans shifts up a gear under mild driving conditions.. Any guesses as to what the issue might be? __________________ 66 Chevelle with 2013 LFX V6, 6 speed auto, full Hotchkis suspension, Wilwood 4 wheel discs.

06-10-2025, 02:15 PM	#2
xstuntman Drives: 2012 Victory Red LFX Join Date: Dec 2012 Location: west central Texas Posts: 1,367	Stumbles usually are from air or fuel being incorrect but in your case it might be stale gas if sitting a while. After that I would be looking at TPS, MAF, oxygen sensor, vac leak, faulty spark plugs. Other options are fuel injectors or plugged exhaust. __________________ '18 SS wheels, colored matched Heritage grille, actual driving lights, ZL1 strut tower brace, GM Performance billet aluminum fuel door, victory red rotors and calipers, 1/4 window American flags, splash guards, AEM dry panel air filter, Hot Wheels steering wheel and seat covers, Hot Wheels exterior emblems.