Gas milage dropped???

[redsaleen]

I have a 94 GT convertible. I was getting about 200miles to the tank with these mods. CAI, O/R H-pipe, Catback exhaust, 3.73 gears. I added a set of BBK Equal length headers and now I get about 140-150 miles to the tank. I'm filling up at the beginning and end of every weekend. With gas prices, this sucks. Is this normal? What are other people averaging? I do not have a fuel pressure regulater, but I do have a gauge. And it's hanging around 33. Any suggestions, or thoughts would be appreciated.

Thanks

 

[stunner6910]

check your O2 sensors. since you switched out headers, something MIGHT have happened to them in the process and lord knows they can be a b i t c h on gas consumption.

 

[bigb64]

i'm lucky to get 200 miles on a tank

 

[Venom351R]

I can get 230 maybe even 240 if I let the needel get down there. I have brand new 02 sensor, Fuel filter, plugs, and fairly new cap and rotor. 230ish miles out of a tank isent to bad considering its blown.

 

[Yellow302]

is that your FP with vacume or without... by the number it looks like thats with vacume.

mine's set at 40-41 without vac
30-31 with vac

you might be running a little rich, just my opinion.