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Ford Truck Club Forum > FORD BRONCO | BRONCO II > 1987-1991 Ford Bronco



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  #11  
Old September 17th, 2013, 08:41 AM
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Tyler.purrington Tyler.purrington is offline
 

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Could have someone messed with her the ecm? My check engine light works but I'd think it would be on since the sensors aren't hooked up?
  #12  
Old September 17th, 2013, 09:59 AM
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Yes and no. The EECIV ecu's are kinda funky with codes. Your best bet is to repair/replace the Emission System. A Junk Yard will be your best friend for the A.I.R plumbing. You can get away with running without a cat for the time being as it will have no impact on sensor readings. The EGR valve I wouldn't trust from a JY. A smog pump from a JY would be ok as long as it spins freely without noise. These engines run more efficiently and last longer when these systems are functioning properly. As far as someone messing with the ECU, I highly doubt it as the MAP system ECU's have very little to no aftermarket support for tuning. Only other thing could be the previous owner replaced the ECU with an incorrect one but even then I'd think your situation would be worse.



1994 F150 XLT ExCab SB 306, 4R70w, 8.8 3.55 open, MSD StreetFire coil, Taylor Siro Pro wires, MSD cap and rotor, 1.72 Roller Rockers, 2º cam advance w/ Cloyes Street True Roller timing set, Flat top Hyperutectic pistons, Flowtech Long Tube headers, Xpipe, High flow Magnaflow converters, Spintech XL Sportsman DIDO muffler.


Last edited by bikertrash3531; September 17th, 2013 at 10:02 AM.
  #13  
Old September 17th, 2013, 09:19 PM
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It has everything but smog pump and cat, I was going to buy vacuum hoses and start running them. Do indeed a smog pump for this?
  #14  
Old September 17th, 2013, 09:44 PM
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The Smog Pump provides the air needed to run the A.I.R system. Ultimately, through a series of valves it will pump air to the exhaust ports or to the cat. In the exhaust ports, the air will ignite the hot unburned hydrocarbons coming out of the cylinder. Without this, the O2 sensor will see this and cause the ECU to react accordingly. The air to the cat is to help "light off" the same hydrocarbons and assist the heavy metal catalysts in "scrubbing" the exhaust gasses. It also increases the life of the factory style cat. Since the cat is downstream of the O2 it is not needed at the time being and the tube that runs to the cat can be vented into the atmosphere, Its just air.



1994 F150 XLT ExCab SB 306, 4R70w, 8.8 3.55 open, MSD StreetFire coil, Taylor Siro Pro wires, MSD cap and rotor, 1.72 Roller Rockers, 2º cam advance w/ Cloyes Street True Roller timing set, Flat top Hyperutectic pistons, Flowtech Long Tube headers, Xpipe, High flow Magnaflow converters, Spintech XL Sportsman DIDO muffler.

  #15  
Old September 18th, 2013, 12:06 AM
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Okay thank you. A smog pump is only $80 new so I'll pick one up and start to run all the lines
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Old September 18th, 2013, 10:05 AM
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1994 F150 XLT ExCab SB 306, 4R70w, 8.8 3.55 open, MSD StreetFire coil, Taylor Siro Pro wires, MSD cap and rotor, 1.72 Roller Rockers, 2º cam advance w/ Cloyes Street True Roller timing set, Flat top Hyperutectic pistons, Flowtech Long Tube headers, Xpipe, High flow Magnaflow converters, Spintech XL Sportsman DIDO muffler.



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