r2wilde

I believe this to be a fairly routine problem that is discussed in a variety of threads ie. exhaust leaks, engine ticking noises, lost power and in most cases not totally understood. It seems you can block the inlets with little to no decrease in performance. There are even some who believe total removal of the emission system improves performance albeit at the cost of our atmosphere.

The Secondary Air Intake Manifold had completely failed when I got my truck. All the inlets were plugged and I'm wondering what the lasting impact on the engine will be. Is it really worth it to try and repair or just leave it as is?

I'm hoping that some of the experts on this site will clear up the importance of keeping this system functioning as designed or at least confirm that disabling some of the parts (particularly those that are difficult/expensive to repair) will not result in burnt values or premature engine failure.

Thanks in advance for sharing you knowledge and experience.

Roy

Just call me Sean

iTrader: (1)

Removing the smog system will have no detrimental effects on the truck, it's just to make the truck cleaner emissions wise. All air introduced into the exhaust is after the combustion chamber so it will not affect the way the truck runs. The only problem would be if the smog pump pumps air at the wrong time to the wrong place, and even then it just makes the truck backfire. With it removed you don't have to worry about that. If you leave the control solenoids hooked up and cap the vacuum lines out then you won't even get smog codes stored. Now the EGR is another story, it needs to be there and needs to work or performance and gas mileage will suffer.

dirtcrew51m

First, as I stated in another post, we are not experts just cheap *** hacks who wont go to a mechanic, we repair our trucks with zip ties and duct tape, but seriously there is no real cost to the atmosphere with a truck running without the A.I.R. system, the vehicle still burns the same amount of exhaust, the system just recirculates exhaust, introduces air from the air pump thus diluting the parts per million of hydro carbons, the real thing that reduces emissions are the cats. The only thing the AIR system does is dilutes the hydrocarbons thus making the enviro hippies to think the vehicle is running cleaner, yet it is putting out the same amount of hydrocarbons until the exhaust is introduced into the cats. If the truck runs fine without it, leave it, if you want it to operate, fix it. there is no gain or loss in power, actually under stress or during performance driving the AIR system is not active.

r2wilde

Thanks for putting me at ease that I'm not ruining the engine by not getting this fixed right away. If it were'nt for the darn state inspection I probably would do like many others and remove all the superfluous crap.

Roy

Just call me Sean

iTrader: (1)

That's not how it works. It adds oxygen before the catalytic converter to aid in the combustion of unburned hydrocarbons. It's not there to "fool" the sniffer.

r2wilde

By state inspection I didn't mean the sniffer. I was referring to modifying the emission control system.

Just call me Sean

iTrader: (1)

The sniffer tests the hydrocarbon levels. Not everywhere uses it.

dirtcrew51m

You have to watch, if emissions are checked I dont know if they check, but here in Jersey they open the hood and make sure every thing is there. This is why I do not play around, if anything breaks I fix it or if someone before me rigged it I still make it work right. and yes as Sean said and I forgot to mention, the AIR system puts O2 to help burn uncombusted gases.