Ugh....running too rich
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Supreme Member
Joined: Feb 2002
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From: miami, florida
Ugh....running too rich
Look to sig for work done.
Ever since I installed the motor, I am guessing roughly 5mpg. I pulled the air cleaner and I can visably see the injectors are shooting too much fuel. I pulled the codes 43 and the one for the MAP sensor. Also, my PCV valve hose is too soft, so it gets sucked flat. (At least my vacumn is good...for a change.)
What I was wondering, where is the MAP sensor located, a pic would be great.
Same for the ESC, which I never changed with the motor.
Also, what is the part number for the line between the PCV valve and the throttle body? Since I know more about my camaro than the parts guys for the local dealer. =\
Ever since I installed the motor, I am guessing roughly 5mpg. I pulled the air cleaner and I can visably see the injectors are shooting too much fuel. I pulled the codes 43 and the one for the MAP sensor. Also, my PCV valve hose is too soft, so it gets sucked flat. (At least my vacumn is good...for a change.)
What I was wondering, where is the MAP sensor located, a pic would be great.
Same for the ESC, which I never changed with the motor.
Also, what is the part number for the line between the PCV valve and the throttle body? Since I know more about my camaro than the parts guys for the local dealer. =\
Supreme Member
Joined: Dec 2001
Posts: 1,418
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From: Morris, IL
Car: '91 t-top RS; '91 hrdtp Z28
Engine: LO3;383tpi
Transmission: 700r4;very nice 700r4
Axle/Gears: 4.10 zt posi, 3.70 auburn
Yeah, 5mpg is definetely horrible. You should at least be getting 15 mpg, but more like 20-25mpg. So first, to answer your questions:
Your map sensor is on the passenger side of the firewall-it has a vacuum line running to it obviously. Your esc module is on the drivers side of the firewall, left of the brake booster. Make sure you not using the 305's knock sensor either. As far as the hose to the pcv, go to auto zone or where ever and get a hose that matches and try that. It should be thick rubber. Make sure your valve is good as well.
Other things to check/suggest: Base timing, custom chip, winaldl data, torque converter lockup, burnt wires/correct firing order, fouled plugs, engine warming up to operating temp, etc. Keep in mind it could be a number and combination of things, as anyone of those alone wouldn't make for such horrific gas milage.
Your map sensor is on the passenger side of the firewall-it has a vacuum line running to it obviously. Your esc module is on the drivers side of the firewall, left of the brake booster. Make sure you not using the 305's knock sensor either. As far as the hose to the pcv, go to auto zone or where ever and get a hose that matches and try that. It should be thick rubber. Make sure your valve is good as well.
Other things to check/suggest: Base timing, custom chip, winaldl data, torque converter lockup, burnt wires/correct firing order, fouled plugs, engine warming up to operating temp, etc. Keep in mind it could be a number and combination of things, as anyone of those alone wouldn't make for such horrific gas milage.
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Joined: Mar 2003
Posts: 523
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From: Marion, Iowa
Car: 92 Camaro
Engine: ZZ4 Crate Engine w/Hot Cam
Transmission: Rebuilt 700R4 with Transgo and MW 3
Axle/Gears: 3.73 Eaton Posi
i would definitely change the oxygen sensor. It's on the exhaust manifold (On the 350's there may be one on each manifold). They are expensive but it could be your prob. I replaced mine and I went from 20mpg to 26mpg or better on open highway. I got better mpg on my 305 TBI than my mom's MPFI 4 banger! Check it out man!!!
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