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Running Rich, But Could it Be?

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Mark90gst

15+ Year Contributor
73
8
Apr 15, 2005
Near Hartford, Connecticut
just recently I got my second DSM on the road and this car really runs rich. I mean rich, well only after about 5 psi of boost, and by 15psi it is richer. I can't understand. It should be leaning out if anything since I have stock injectors. I have tried a different FPR and MAF but no luck. Mabye I have bad injectors but they run fine off boost. I'm going to read the resistance across them this weak. I have done a boost leak test and I'm perfect at 25psi, no leaks. I'm not venting my BOV either. my other mods are in my profile. any input would be apprecatied.
 
Well I think I'm rich because I went to the dyno and made a few pulls, then all the guys made fun of me and tell me im running pig rich, also air fuel ratio gauge goes all the way rich after 5 psi but you cant trust that thing. Last it smokes a bit and smells like gas bad when it is boosting( unburned fuel) I dont know. thanks for the help
 
Mark90gst said:
also air fuel ratio gauge goes all the way rich after 5 psi but you cant trust that thing.

Tape off the area around the gauge, then spray the face of it black. Then the problem of the blinky lights making you think something is wrong with your car will go away.
 
LOL. second the painting of the gauge face!!

only way you could be running rich is if your fpr is being overun. if you have acess to a wideband (dyno place should have one) or running a pocketlogger, but even then you can know for sure with your stock 02's. hook up a fp gauge and test the base fuel pressure.
 
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