Hello again.So far you have been spot on with my mustang problems,so here we go again.My 1995 mustang is now emissions exempt.I removed the smog pump, no problems.I then removed the EGR valve and installed a bypass on the wiring harness.I plugged all of the open vacuum lines and the open pipe on the headers.I now have 3 engine codes 332,314,311.All codes are EGR related. Any help would be great.Thanks again

Sounds like the bypass harness is not working. I checked with one of the guys here that was a Ford tech. and he said the bypass harness is most likely not giving the correct resistance to trick the computer. I can see getting rid of the smog but the EGR is not going to cause you to lose or gain horse power. I would hook it back up if you are able. The computers on the 1994-95 cars as well as the newer cars are tempermental and don't adapt well to change.

 First off I would really like someone to show me a big enough gain in horse power to negate them removing the emission control off a vehicle, and where it's actually cost effective, in the sence of having to get a phoney state inspection at an extra cost and the time is take to find that certian someone that'll do it, plus all the other risks involved.

 With this said let's look at the EGR system:

The EGR system is used for lowering the NOx formed during combustion. In the presence of sunlight, NOx reacts with hydrocarbons in the atmosphere to form ozone (O3) other wise know as a photochemical smog.

 The EGR system does not operate during ,idle, cold start-up, and WOT, and only small amounts of exhaust are all that's needed to lower peak combustion temps.

Operation the EGR at WOT would reduce engine performance, in addidtion to lowering NOx, the EGR system helps control detonation, using an EGR system allows for greater ignition timing advance sooner without detonation.

Now for your smog pump, or primary and secondary air injection systems:

The air pump provides air necessary for the oxidation process inside the catalytic converter.

During cold start-up the air is pumped to the back of the heads to help provide enough oxygen to convert hydrocarbons and carbon monoxide to water (H2O), when the engine goes to closed loop and is warmed to operating tempature, the air is diverted from the heads to the converters to help oxidize HC, CO, into H2O and CO2.

Under rapid deceleration and the vacuum rises above the normal idle level, air is diverted back into the air intake system to silence the air incoming, and keep the engine from backfiring.

Probably the most loss in horse power from this system would be a maximum of 6-7HP, if that is such a huge loss for a cleaner/better running and performing car, than you might want to try adding a K&N filter to offset the loss in power, or try some under drive pulleys.

But untill someone brings me some hard evidence that it's that much of a power robber, and harms that much performance, to wade around to all the underground service shops and pay 3 times the amount for my state inspection sticker, I'll drive mine green and with peace of mind and more dollars in my pocket.

Thank You LRS for providing me with replacement smog parts for my Fox body!