need help with codes (s/c sho)

[DavidT]

KOEO:
5
51
15
I know there is no "5", but...

KOER:
98
51

When I did the KOER test, it wouldn't let me do the goose test, it immediately started reading codes...


Do I need to change the ect sensor?


Besides the ce light, symptoms include:
rough low end... hesitation- (struggling for something), backfiring. When this occurs, even the boost guage jumps around.

High end feels pretty good though
Thanks!

 

[DavidT]

its getting worse. Now it has a "miss" at the high end too frown

 

[AutoSHO]

A miss is most likely spark or ignition related. It may be as simple as a new set of plugs to solve that problem... If you are running that rich you will probably foul plugs pretty quickly.