I have a 1993 f150 4x4 with a 302 does anyone know what i need to do to remove all the smog pump crap and cats any help would be great.

 

You're treading on ice with this one...alot of opinions no doubt will be spoken.Unless you've got the smog pump (air pump) delete kit...leave the pump on there.there are lines that run from the smog pump to the backs of the heads....unscrew them and you MUST plug them off with machine plugs...the kind that fit right in there with either a 3/8 or 1/2 ratchet head.On your exhaust pipe there'll be a line running from your pump to I think your cat...not positive...that can just be secured and hang there...just pumping hot air.......That should get you on your way...I've been wanting to do this on my 95 Flareside with a 302 but haven't gottem around to it yet...I'll probly do it when I rebuild the motor and drop it back in.

 

Remove it and replace it with what? The onboard computer is programmed to the specific emission system and fuel parts (Calibration Code) you now have. Making changes, alters the Calibration Code, and you will soon discover the vehicle will not run correctly with the replacement parts you're planning on using. Everything must match the specific Calibration Code.

 

Maybe someone can answer my question in here since I can't seem to post a new thread (?).

My air pump seized over the time my truck was sitting recently. Is it possible to free it up or should I just invest in a new/used unit? And.. If I bypass the airpump with a shorter belt can I leave it connected and I'll be fine or will I mess stuff up?

 

Theoretically yes it would mess it up.Since it would still be hooked up but not used it might mess with ur computer....Not sure how to free it up...maybe a little 3N1 Oil? or some lubricant non combustible.......they seem to seize up all the time and I've seen a few that were bypassed and ran just fine....however if you want a used one and ur in Florida...I got one on a spare motor......Where's Conanski when u need him?

 

Well... heres my take.

I cut the cats off my truck about 20,000 miles ago. I left all the smog stuff on, and just left the pipe leading to the cat dangling underneath. When the tranny went out... I finished the job.

When I pulled the engine, I myself did a few modifications to the smog stuff. For instance, removing it. The back of the heads got plugged off, and since you can't really bypass the air pump with the belt, you have to leave it. Since I couldn't get rid of it, I ran a hose from the outlet of the pump, and ran it to the little baffle that sits on the passenger side behind the battery. You'll see the hose running to it, and occassionaly will feel air blowing out of it. With mine, air pumps out of her all the time.

As far as how it runs... well... I like it. I didn't notice any power decreases at all. If anything, it seems if it gained a little low end. But it still runs good, and still gets around 12-13 MPG no matter how I drive it, or where I drive it. Plus, I like the classic truck sound anyway.

 

My two cents...

Nice to see some states don't hassle you with this, but they might some day soon, then you're stuck replacing all the stuff taken off. I know in MA, the cats must be present in every car/truck 1980 and later. Worse, for Fords (which are the only ones I really see these in) the smog pump must be present, even though 1983 and older are emissions exempt.
Other states are gradually adopting tougher emissions regs, so unless one reaps a dramatic increase in performance or mileage, best to leave well enough alone.

 

Also if they find out that YOU removed it's big fines. Not $250 try $10k++ per instance. It's also a FELONY in most states to sell any vehicle with non functioning or removed emissions equipiment.

 

They'd have a heck of a time with people around here. Here in Union county I think cats are illegal haha.

 

There's no need to remove the cats unless they are plugged or you are replacing the whole exhaust system with headers and custom plumbing. Even then there's no good reason not to install an aftermarket cat.
I have free'd siezed air pumps before, sometimes they are fine for years, somethimes they don't last. If you remove it you have to remove all the plumbing and plug the heads and vacuum lines or you will have problems.

 

Chad, in the state of Ohio (what a wonderful pace to live......) if you sell a vehicle without brakes or emissions equipment, not only is it a felony, you can be sued for the cost of restoring the vehicle to "proper" working order. It's written into the law.

 

pfogle, do you have a reference to this law ?

I live in Ohio and and am very interested.

I also wonder if you are responsible if you offer full disclosure when selling.

 

Can you totally remove the smog pump and emissions and run a smaller belt? can this be done?

 

kolb02-- Yes you can do it (I'm fairly certain the Federal fine of $10k applies to repair shops, dealers, or Chuck Next Door who removes this stuff on someone else's vehicle with or without charging for it)

As the owner, you can do this, but as they say in the other posts, why bother? You're not going to see much (if any) of a jump in performance or gas mileage-- and without these things you'll never pass the emissions test unless it's a real old truck. In Massachusetts they don't check emissions 1983 and older, BUT they look for the smog pump under the hood and they look under the vehicle to see that a Cat is present. (I knew some who hollowed out their cats-- but the emissions standards were easier back then. Now, for example, a 1984 model must pass emissions testing with stricter limits than when it was new. -- side "benefit", gets older stuff off the road and helps out the new car dealers--

As for the smog pump, had a 77 Maverick I took the smog pump off, and even though it was emissions exempt at that time, the inspector looked under the hood and told me it had to be there. Didn't have to be connected, but it had to be there. I had thrown away the old one that was seized so went to a bone yard and picked up a different one and bolted it on.

Long story short, unless your truck is pre-1980, don't chance it unless you're only going to run it on your property thus not registering it, like they do with farm trucks.

 

netscaner If pfogle can't find the exact quote of the law, each state has an official website and their respective DMV sites are usually part of that. In turn each DMV site (For MA it's RMV) will have Federal links RE emissions.

BTW, some years ago MA passed a law requiring everything from 95 and newer to pass rigid CA emissions tests and have CA emissions packages. If one buys a new car in a non-CA state, you can't register it here until it reaches a certain mileage, or you retrofit CA emissions equipment. So for everyone, check your individual state web site for vehicle regs.