mustangfxbdy

finally got around to where i could run a koer test because car was running way to rich imo.. so the codes came back 41 which is 02 sensor not switching always running lean. so i ran to the parts store bought 2 new 02 sensors. code is now gone and shes not running pig rich anymore....

just thought id share this with ya....

WhiteFoxGT

Im having the same "problem" No codes, and the only codes in the history is something like low EGR flow...When idling its rich as hell, and just driving around anywhere. I re-used the old O2s when I bought my h-pipe, maybe I should replace them?

mustangfxbdy

when just checking the codes with the koeo(key off engine off) it didnt show these codes... funny..

but when i ran a koer(key on engine running) the code 41 popped up......

have you did a koer test on it to verify def. no codes.

depending on how old the 02 sensors are id replace them if you got the extra cash....
but there are several reasons why a car would run rich....

WhiteFoxGT

I hooked up the scanner and did a koeo test, and no codes present, but in the history is where that code was. I've been dying to kno what could cause my car to run this rich. Other than O2's what could be the problem? EGR not flowing well? Too much fuel pressure?

Blckstng93

Thats normal. They dont show up KOEO, only KOER.

Lysawy

Same problem here running really rich regardless of pressure took off spark plugs and o2's black soot all over the place...

i have all the emission stuff off ...

will scan the codes repleced the map sensor b/c it wouldnt run at all without it... black smoke out the tail pipes


also cylinders are coated with carbon, pinging when really hot , oil gets dirty quickly...

Blckstng93

Check your vac lines. Checked you PCV lately?

Lysawy

yes ... just did the lower intake , waterpump, timing cover gasket, all new vac hoses ... checked for vac leak....

gotta scan the codes but all the emission stuff is off .. i bought the car like that..


noticed my rpm jump up and down will settle but only if i raise it to around 1000 rpm...

checked tps voltage when moving the idle screw its perfect at .987 v

got a new Iac motor.... runs strong but only when its cold outside denser air perhaps for the rich condition...


alternator just went yesterday bearing got loose ... damn this car is $$$ ...

mustangfxbdy

do a koer test thats where my 02 code popped up... no codes showed up in the koeo test....

mattdel

running codes wont show up on KOEO unless they are hard, engine light on all the time, kind of codes. other than that all you will get is evap codes. KEOR is the way to go. btw, check your ECT.