New and have a fuel issue

[evolegacy]

hey all, Im new to the site and if you wanna check my ride out you can see it at http://www.cardomain.com/ride/2917551

But ya, about my fuel problem. I seem to be running very rich, when i start the car and have it idle, i smell a lot, and i mean A LOT of fuel, as if i was at a gas station with the pump going. I have an AFR gauge and the thing is going bonkers when im driving and when its at idle it goes from mid lean to mid rich. I have new O2 sensors, knock sensor, spark plugs and wires, fuel filter, etc. I checked the timing at 700 rpms and it sits at 20 degrees like it should, so the timing isnt off, and I checked the blet for broken teeth and they are fine as well. I was thinking it could be a broken fuel injector or a bad fuel pump but im not getting any CELs for those, anyone have any ideas?

[Grafton]

the SRI + the new exhaust is causing it. the MAF has issues with non stock intakes under 2K rpm but mainly @ WOT, i know mine was running rich @ idle just with the snorkel delete, i modified the snorkel now it doesn't run rich @ idle

[evolegacy]

ew.....I lost the snorkel at my exs place when she owned the car, but i dont really wanna downgrade......hm....I had a buddy of mine tell me that there might be too much back pressure from the exhaust that could be causing the richness, atm its borla headers, magnaflow hi-flow cat and muffler, all attached to a custom mandrel bent 2 1/2 in pipe. the other thing he mentioned was it could be a program error on the ECU, so i might pick up a piggy-back to adjust. any other ideas what it could be or does that pretty much sum it up? lol

[jey]

If your AFR gauge is hooked up to the O2 sensor, not a wideband sensor, it's not going to provide you useful information. You're going to get the lean-rich back and forth because the O2 sensor is not sensitive enough to provide an instant reading - it's more of a general reading for the ECU.

What kind of gas mileage are you getting?

[evolegacy]

haha well that explains a lot, but not the smell of gas. hm....

as for mileage, i never really looked into how many mi/gal but i know i can go roughly 350-400 miles on the highway before having to refill, maybe half that in the city.

[jey]

Check the condition of your fuel lines and connections. Perhaps check for exhaust leaks too - our cars tend to run a little rich - enough that it can smell a little like gas in the exhaust.

[evolegacy]

hm.... thanks for the advice, but im noticing something that just started today, the engine hesitates at acceleration after being on for a few minutes, almost to a full stall. But after a 5 mins go by it stops. gah, got to love an old engine HAHA!

[Okin DaVanh]

Did you find your leak?

[evolegacy]

due to the weather i havent gotten a chance to look for it yet. Bringing it down to my group's shop to do some other work to it so when i do that I'll look for it then.

[sexystover]

its the intake plain and simple, it causes u to run rich, get an apexi safc and tune it

[evolegacy]

i'll look into picking that up. But i had a buddy of mine take a look at the fuel system to check for problems, turns out i have a bad FPR, got to go replace that when i get the chance.

[sexystover]

well if it is a bad fpr that should help u some bu it will still run rich when u accelerate up untill about 2000-2500 rpm