I have a 2001 chevy silverado with a lm7 5.3l. the truck has 300,000 miles on it. I'm swapping the engine out for a 2005 lm7 5.3l with 70,000 miles on it (the price was right). I'm replacing all the seals on it before dropping it in my truck. Also putting headers on it... Probably. My question is: should I do an EGR delete? I would do all the proper reprogramming. I just want to know if it would cause more problems.
Thanks
why do you want to delete it?
If your state does emissions testing, the truck will fail it.
The headers I have gotten doesn't have an egr port.
And IL doesn't have emission testing I'm outside of any major city
it seems easier to just get the right headers. Programming isn't cheap.
I think the entire engine was engineered around having an EGR system. When you take out an integral part like that, the rest of the engine just isn't going to run the way it's supposed to.
* EGR improves fuel economy too. By diluting the mixture when power isn't needed, you are reducing fuel consumption.
* Under high load the EGR shuts off as if it isn't there, so I can't really rob you of power.
* In fact, you gain power , because it removes pumping losses at reduced throttle.
To me it seems like a bad idea to remove it.
Removing and blocking off the EGR will stop the engine from re-burning exhaust gases. I did it to mine and it runs better and I don't have to worry about busted EGR valves that always seem to get crudded up and make the engine run worse. I live where there is no smog inspection so I took off all the emission related equipment on my truck. It runs much better. As long as hypocrites like John Kerry are dumping tons of C02 into the atmosphere on their private jets, I don't feel too bad about de-smogging my truck.
exhaust gases can't burn because they contain no oxygen or fuel. They are inert and pass unchanged through the engine. They're used to reduce combustion temperatures. Does your engine run hotter?
Actually, it runs cooler. Exhaust gases do contain unburned fuel. The egr valve was a crude, early attempt at smog control by re=burning unburnt fuel in the exhaust. The cooling you are talking about was accomplished by the then air injection systems.
unburnt fuel is neutralized in the catalytic converter.
"EGR works by recirculating a portion of an engine's exhaust gas back to the engine cylinders. This dilutes the O2 in the incoming air stream and provides gases inert to combustion to act as absorbents of combustion heat to reduce peak in-cylinder temperatures. "
https://en.wikipedia.org/wiki/Exhaust_gas_recirculation
"Secondary air injection (commonly known as air injection) is a vehicle emissions control strategy introduced in 1966, wherein fresh air is injected into the EXHAUST stream to allow for a FULLER SECONDARY COMBUSTION of exhaust gases. "
https://en.wikipedia.org/wiki/Secondary_air_injection
Whatever, my engine runs better without it.
Placebo effect