Bronco Forum - Full Size Ford Bronco Forum banner

1 - 3 of 3 Posts

·
Registered
Joined
·
217 Posts
Discussion Starter #1
44 Thermactor Air Injection system inoperative
34 PFE or EVP circuit above the closed limit of 0.67 volts.
25 Knock Sensor (The connector broke off and I never replaced it, just unplugged it)

I removed the air pump because it locked up...but would any of these codes cause me to get 10mpg freeway at 75, and 8mpg in the city. (I could pull 12 at 80 with the truck on same tires and trans. It had 300 with a cam, 500cfm edelbrock, header, and close to same exhaust...and this does include a correction factor of 1.06 (difference between 31s and 33s)...I got it up from 7.5 (timing was WAY out) just by setting it from ~7.5 to 12BTDC. It has a fresh oil change/wires/dizzy cap, but it does have an exhaust leak at the passenger side flange.

Code 83 is the only code I got from KOEO test. EGR Control solenoid circuit failure.
Besides the 33"s and C6, could the lack of smogpump and exhaust leak be killing my mileage? :beer The bronco has pulled 11 before in the exact configuration, but with a leaking headgasket and no leaking exhaust.
 

·
The Anti Yam!
Joined
·
22,674 Posts
34 KOER = EVP circuit above the closed limit of 0.67 volts.
The EVP is relaying a reading to the EEC that is imposable, Test it.
http://fordfuelinjection.com/index.php?p=35

44 KOER = Thermactor Air Injection system inoperative (Right side).
Self explanitory in your situation. If done properly this should not affect milage.
Are you in the Metro Atlanta area? (emissions testing)
Are there still cats on it?

83 KOEO = EGR Control solenoid circuit failure.
I have never seen this one before. I would guess it is refering to the EVR, but I am not sure.
http://fordfuelinjection.com/index.php?p=43
 

·
CheeseBurger Milkshake!!
Joined
·
3,760 Posts
Smogpump shouldn't affect mileage.

The EGR valve might be bad or gummed up. That would affect power and mileage.
 
1 - 3 of 3 Posts
Top