****to the moderators of the forum: i meant to post this thread here, and accidentally posted in the carb section. I don't know how to make that other thread disappear. sorry :-( *****

Hey all,

It's been forever since I've been on here. I hope you are all enjoying your thirdgens

Recently, my car has been burning quite rich. My fuel mileage is pitiful, too. I used to get, believe it or not, about 275 to 300 miles out of a full tank of gas on my bird with my v8 305 tbi. That is phenomenal mileage for this car. Now, I am lucky if I get 200. :-( :-(

I switched my spark plugs because I was going on a really long ride to north Jersey (wanted to be safe), and it ran really rich, so I switched them back to the same type of autolites I had on before (but I got new ones). It solved my problem for a little while, but then the car began acting up again.

I have replaced my o2 sensor and catalytic converter (it was hollowed out before, and I was actually unaware). Like I said, I have new spark plugs, as well.

The car runs rich, and when I step out after I shut it off, the smell of gas slaps me in the face. I know I have an exhaust leak, but the gas smell is like a raw gas smell.

Since I have owned the car, which is almost a year, I have not yet replaced the fuel pump.

Only things I have worked on/replaced/put in fresh are:

Fan switch
Relays pertaining to the fan/ignition
Oil filter
Oil
Transmission fluid
Spark plugs (autolites, to bosch- they were awful and I learned my lesson, to ac delco rapidfires- I didn't like these either, and back to the plain autolites)
Tranny mount
Brakes (front and rear)
Antifreeze
Radiator work
Catalytic Converter

Does anyone have any suggestions as to what might be causing my problems?

Thanks in advance for any help you may provide

 

If able, check fuel pressure, should read 9 - 13 depending the health of your fuel pump. Other things to try is ohm your injectors...should read about 1.3 ohms and check out your spray pattern from the injectors...should be conical in shape, not dripping. Like the other response in your "carb" thread another thing to look at is the fuel pressure regulator (FPR) which is integrated into the throttle body. If the pressure is good and the injectors ohm okay you might want to get TBI rebuild kit and replace the injector filters, o-rings, gaskets, and FPR spring. Also, what did you gap your new spark plugs at? Sounds like your leaking fuel somewhere. Good luck.