Hey guys,

After fixing my previous CEL issue, I was quite excited to've accomplished that. But a few days later, another 2 CEL's popped up. Here they are:

P0301 cylinder 1 misfire

and

P1171 manual control fuel air mixture (something like that)

Any idea why I have these going on and/or how to correct them? Would the cylinder 1 just need a simple pull of the plug and a re-gapping? Then the second one, I have no idea.

Any help would be awesome..

Thanks!!

 

the misfire cyl 1 could be a number of things...firstly, I would switch coil packs with a different cylinder....if the code comes back and moves with the coil pack....theres your problem. if the code still stays with cyl. 1, i would then replace the spark plug....if it still comes back to cyl 1, then you have a bad injector, or an internal engine issue. CHeck the compression on cyl 1 if you get to the point of pulling the spark plug if possible. ALso check the color of the plug when/if you pull it out...

The P1171 is a GM specific code, maybe someone else can chime in on that, I'm a chrysler tech.

 

a p1171 is not a missfire code yeesh its a manufacter specic a/F code po301 would be that would be missfire (3) 01 cyl specific thats why a multiple random missfire is po300 the 1 is manufacter specific codes take it to good drivablitly tech shouldnt be to hard to diag if u lived in az id help ya im a drivabilty tech

 

are you drunk? haha

 

P0171 is a lean code witch could be caused by the P0301. as for fixing the P0301, I would try and re gapping, and if that doesn't work then swap the coils and then get back to us. Also disconnect the battery each time you make a change.