(95 LS) Im running very rich (aprox 20-21mpg) I usually get 25-28. I replaced the injectors, and FPR, new plugs, wires, cap and rotor. I've done all I can think of. I also have noticed a performance loss, and when i took off my intake and opened the butterfly on the throttlebody, I could see/smell a gas vapor cloud come out. Compression is fine, so is leakdown. Any ideas?

 

Somebody?

 

why didnt you change ur o2 sensor and pcv valve, that can make it run rich,

 

Sorry, I changed the pcv valve(forgot to mention), and I didn't bother with the o2 because if thats bad doesnt it throw a code??


[Modified by Tegra, 8:16 PM 1/27/2003]

 

QUICK catch him!! (hrhr)

make sure you have all the vacum hoses on the right way... FPR diaphram may be open

 

I checked all the vaccume hoses and I replaced the FPR with a new one, chances of them both being bad are next to nothing.

 

Will a bad o2 sensor always throw a code?