Vacuum line deletes and diagram?

[great white]

I removed it for a cleaner look in my engine bay. Put a vented cap on and I've never had any drawbacks.


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That you know of....

 

[93SierraWT]

That you know of....

Well thanks for your concern but like I said it's been ran that way for years without a problem. It's not your truck so don't worry about it.

 

[great white]

Well thanks for your concern but like I said it's been ran that way for years without a problem. It's not your truck so don't worry about it.

no need for attitude bub...

 

[dave_erald]

So if looking for performance egr only works part throttle at cruise, for emissions to help reduce nox, by pulling exhaust in it cools the heads sounds backwards but it does. And canister pulls vapours out of the tank. There are ways to hide this stuff without removing it and make it look good. Take the time and do it right.

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[great white]

So if looking for performance egr only works part throttle at cruise, for emissions to help reduce nox, by pulling exhaust in it cools the heads sounds backwards but it does. And canister pulls vapours out of the tank. There are ways to hide this stuff without removing it and make it look good. Take the time and do it right.

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Good summary. Cooling the heads I'm skeptical of, I've never read that in any of the references I've been exposed to.

Egr has other functions as well. In feeding the EGR into the combustion chamber, it lowers combustion temperatures. While it is primarily to reduce NOX (reducing combustion temps reduces nox), the reduction in combustion temperature allows the ECM to dial in more ignition advance prior to knock occurring. The ECM will keep adding advance until the knock sensor calls a halt to the fun. By pulling the egr off, you loose the advance that you would otherwise be able to take advantage of.

By allowing more ignition advance, the engine achieves better MPG and an increase in power. The additional advance far outstrips any "perceived" loss of fuel/air (there is none by the way).

There's a whole science about egr alone. Quite fascinating when you get into the workings of it all.

The early emissions were primitive and the benefits weren't as obvious as they are in newer designs, but they are there.

 

[dave_erald]

No not the head as whole but the combustion chamber portion yes.

I would google some pics on tbi engine bay, I'm sure someone will find something clean. I'm going to look on my computer if I have pics from my blue truck.

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[Ruger_556]

Looks like a pretty clean engine bay in a TBI truck to start with and all that stuff is pretty trouble free... Why mess with it?

 

[IOWNJUNK]

You can re-route the vac lines so they aren't seen, and dress up those you can't hide. That way everything still works, you won't worry about fuel smell, no check engine lights and you won't need to retune anything.

 

[SCOTTYINWV]

I see all of you guys' valid points, as far as needing a tune, someone like me who actually needs a tune to begin with...

So my egr delete would be to run headers.

 

[lkfldredneck]

Thanks for the advice guys, i just wanted to delete some stuff so it wouldnt be too bad to hook back up. As for the canister, there isnt a hook up to the tank as it was removed before but not the canister. Theres a line goin from the tank going to the frame but no line goin from that, so im guessin it was removed but the canister is still there.

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