Had the car dynoed at Fordspeed on Tues(thanks Joe) but the car was running alittle rich(11.5:1) that was at 39psi. Well that's what the fuel pressure gauge on the fuel rail said. So I took 3psi out and went to 12.5 to 1. So I took one more pound out to 35 and still the fucker only went to 12.6 at the leanest. I don't wanna go any lower or the injectors will starting pissing out the fuel instead of sprayin it. When I dynoed the car I didn't have a rear 02 sensor on the passenger side rear due to it wouldn't fit. So now I have one in there(had to take the h-pipe off then put the 02 in) Do u think that the car will lean out now? Previously when I had the shorties on I still had a CE light but I was able to be at the desired a/f ratio I wanted. Now I can't even get back to stock a/f ratio. Or do I now need to invest in a chip finally to lean/richen the car at different rpm intervals? FUCK! Ok that felt better. Thanks. -Mark

 

mines been running really rich, thats only because of the way i have the timing adjusted and it also will run alot better and leaner prolly when you get the new o2. mine did

 

what were your hp/tq #s?

 

Having no rear O2's won't affect your air fuel ratio. Those rear O2's are like a dummy switch, they let you know if your cats are going bad. Get a custom burned chip for your application and be done with it.

 

 

chip is the fix.. fues pressure cant solve everything, and you actually do not want to drop it lower than the stock pressure.

FPR's are supposed to be used to bump up fuel pressure to compenstate for air mods, like mass air , intake, anything that will lean the motor out somewhat

 

That's the weird thing. After the headers the car went rich. All I want is the factory a/f of 13:1 then I'll be happy for now. I just can't believe that the headers made that much of a difference in a/f. -Mark