Running Rich!!! But Why??

[Kdubslugga]

I just got my car back a few days ago, with some backfiring and starting issues. Anyways the mechanic said its running kind of rich. What causes that to happen, and how can i fix it?

 

[Kdubslugga]

the backfiring and stuff had nothin to do with it running rich, he just mentioned it to me

 

[5spd GT]

If you still have the 19lb injectors...I dont' see why it would run rich...can you smell it?...if not you should be fine...check your plugs...the autos are known to usually run a bit richer than a 5spd car...I wouldn't worry about it unless the "richness" makes your eyes water like my car does...it runs real rich at idle ...the eyes get

 

[PNY PWR]

Mine seems to run rich too. Of course it has an off-road h pipe but still it seemed rich. Mine for some reason has an ECU for an auto (A9P)from the factory. After the Superchip it seemed to lean out a bit. I get a haze from the exhaust when I gas it hard in gear.

Could be O2 sensor or something like that. The way I see it, it's better to run a lil rich than lean though.

I notice we both have smog pumps removed too, maybe that will do it?

 

[HISSIN50]

pull codes. also since you have a mechanic, see if he has a scanner that streams (reads real time data) - that would tell you real quick.

good luck.

 

[blkstangman88]

better rich then lean

 

[bmo37]

o2 sensors may be going.