The O2 sensor for my 92 F150 is located in the crossover pipe between the two exhaust pipes, in between the cat converter and the exhaust manifold. I am in the process of converting my truck from SD to MAF and to complete the install of the new kit, I need to get rid of the current O2 sensor and have 2 others welded into the exhaust pipes, one in each pipe close to the exhaust manifold.

So I am wondering how I can do this. I can't run the engine after I have converted to MAF unless I have also installed these 2 new O2 sensors. So I thought that the first thing I do in the process of converting to MAF was take my truck to the local muffler shop where they'd plug up the hole for the sensor in the crossover and then weld in 2 more bungs for the 2 new sensors near the exhaust manifold (then I would install the rest of the MAF system later).

This results in the O2 sensor being a little closer to the exhaust manifold than before and only sampling exhaust from one pipe instead of two. Will my stock sensor and system be able to operate like this, with the O2 sensor being so close now?

Thanks

 

MAF does not require 2 sensors, simply connect the output of the single sensor to both O2 inputs on the EEC, that is exactly how the Ford MAF conversion kits for these trucks were wired, I know beccause I have one. And... earlier this year I converted my truck to dual sensors for testing purposes and it made no difference at all, so I put it back to a single sensor system.

 

Does your system have the output wires from each O2 sensor combine into one set of wires that feed into the computer?

 

No.. it has a single O2 sensor that is Y'd to feed both O2 inputs on the EEC.

 

I appreciate your input, you made me think and figure out what I really needed to do here.

I did some research and what you are effectively doing with your truck is tricking your computer to think there are actually two sensors by using the two inputs.

Since I am building my system for power I want to get as much as I can out of it and I want it to be as accurate as possible. I'll end up going with the two sensors.

 

Did you completely miss this comment I made? I did this on my truck earlier this year and with the tuning system I have I was able to see that dual sensors makes no difference to power or efficiency.

 

Understood, but it is no trouble for me to do what it says in the install instructions. I also have an after market supercharger and that may, or may not make a difference. I don't know the answer but just the fact that I might not have the same setup as you makes me think I should do what the install instructions indicate.

 

If you have a kit with a mustang computer then you have what I have. There's nothing wrong with what you are proposing to do, the sensors are right next to or right in the manifolds on the Stangs so if anything you're just installing it the way it was designed for the cars. But.. it's extra work on an exhaust system you won't be keeping if you have any engine upgrades planned and it's not necessary to make the system operational. I have data from my tuner and wideband O2 sensor as well as a clean bill of health from our local emissions test center that proves this system works just fine with a single O2 sensor.

 

I know what you are saying. I don't know if I have a mustang computer or just what, I know it is from a Ford and is meant to do what I am doing. As for the exhaust, I will be keeping that. What I have on there should suffice as far as headers go; if anything, I'll look in to free-flow catalytic converters.

 

Ok, guys, Donny here, again! I bought a 1990 ford f150 monday night, and put in a new water pump, and thermostat, changed the plugs, wires, oil and filter, and installed new brake pads. Dude i bought it from, at some point in it's history, installed dual exhaust, and left my o2 sensor plug just hangin' so of COURSE I have a trouble code kickin' on my check engine! What, if anything, can i do about it, short of finding a factory exhaust cross-over and goin' back that way? In other words, can I fool my computer, and if so, HOW?

 

well first off stumpy you should post a new thread. this thread is almost 4yrs old and unrelated to your issue.

take the truck to an exhaust shop and have them weld in an o2 sensor bung either by one of the collectors. does the truck have headers or still stock manifolds?

 

What kind of math are you smoking??? And can I have some?

first post for this thread: 04-09-2010, 07:00 PM

 

I like installing the o2 in a connector tube just like stock so you can get pulses from either side...that way if one bank or the other is lean or rich the o2 picks up the condition and adjust accordingly. If the new o2 is located after the merge, then not needed. When I built my mandrel y pipe I welded in a piece of 1 inch pipe collecting both banks before the merge just like stock. I think that is why he is wanting to use 2.

 

Have an o2 bung welded in one of the pipes and thread it back in. Fixed.

 

no crap, i was looking at the Join date. man i need to step away lol

my bad Stumpy