I have a 94 Ford f150. Just did a motor swap to a 5.0 h.o.bout of a 93 t-bird. Block is only thing out of the bird. Everything else came off my other engine. Getting a couple of dtc's. Egr flow insufficient and o2 sensor senses rich condition. I think I might have it figured out but I'm very confused on something. I have a scanner I can read data with and I noticed my shirt term fuel trim was stuck at 0. My long term fuel trim was stuck at -56. My o2 sensor was staying at .2v. neither was changing the way they normally do. This didn't happen when I first got the codes. When I first checked it I entered info for the 93 t- bird. Everything was fine. This didn't start until I entered info for 94 f150. Also, the exhaust keeps popping until engine warms up. I built a set of true duL exhaust with cross over for o2 sensor. Got magnaflow high flow cats and flowmaster 44 mufflers. I do have a couple of pin hole leaks at cat flanges I welded on there that o have to fix. If anybody can help me, I would greatly appreciate it. I'm most concerned about the fuel trims.

 

When you say "Everything else came off my other engine" do you mean the complete truck intake and all the engine wiring and PCM from the truck?

What are the exact code numbers you are seeing? There is nothing on this motor that senses EGR flow so your definition for that code is wrong and that makes me suspect the other code definitions. This PCM does not support realtime data streaming either so I'm not sure how you accomplished that, what scanner are you using and how are you connecting it? I also question the exhaust setup and would like some more info on this crossover tube and the location of the O2 sensor. It doesn't matter if the sensor sees only one side of the engine and it's more important that it be roughly the same distance from the engine as original so putting it in one of the head tubes near the collector would work fine, if you have it way down behind the trans now that is not going to work.

 

Everything on the t-bird motor in truck now is off motor that came off the truck. Code 332 was egr insufficient. Code 173, if I remember correctly was the o2 sensor senses rich condition. I got the new actron scanner that tests one 1 and 2. I retested with my old myd1 scanner to be sure and got the same codes. They were koer codes. Koeo was clean with no codes. As for the real time data streaming, I have no idea. It does though. I'll take video tomorrow if you want me to and even snap a pic or do video of the values of fuel trim and other such readings as well. I got Hooker long tube headers on it and wasn't able to out the cats on until after the cross member. Also, I was under the impression that a o2 sensor had to sniffing exhaust out of both heads. Maybe I was wrong on that. The cats are located after cross member beside transmission. I got the crossover before the cats like on original. The o2 got moved back about about 3 foot.

 

The proper code defs for this system with engine running are.. https://www.troublecodes.net/ford/

332 - EGR did not open/respond during test or if memory code, did not open intermittantly
173 - Oxygen sensor not switching – system is or was rich.

The EGR system on this motor just opens a valve via vacuum control so you could have a broken vacuum line or a leaking EGR valve. It's easy enough to test the valve and line with a vacuum pump or even your mouth with a piece of rubber hose attached, you can see the valve move if it's not stuck. The control solenoid(EVR) is also suspect of course, check that it's not leaking vacuum and that it is opening when commanded.
The O2 code could be a red herring so don't jump to any conclusions on that, something else could be causing the engine to run rich(a leaky injector) and that will prevent the O2 from switching too. Does the fuel system hold pressure after the engine is shut off?
The O2 sensor should be as close to the engine as possible so in the passenger side header collector works fine.. I ran my truck with longtubes like this for many years and the realtime data I saw(I had a tuner on it) proved it ran as it should.

 

I'll give that a try. Appreciate it. Also, how do you check the evr. This is my 2nd Ford of this generation, (first was an 86), and I've never had an egr code. Also, what about the popping in the exhaust. Sounds like somebody is letting off m-80's in there.

 

You have the plug wires routed for the HO firing order?

 

Sure do. I happened to stumble across that on another forum and I'm glad I did. 351 firing order.