C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

smog pump, egr.

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Old Aug 4, 2014 | 08:28 PM
  #1  
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Default smog pump, egr.

I have looked and looked and read so many post about removing my egr and smog from my 86. but no real answers. just want to clean up under the hood. i can leave the pump on motor. i dont have emissions so nothing to worry about. so for smog just remove everything and when i take the lines off the manifolds what do ya cork them with? and egr. thers a temp sensor. just unplug? is there a egr removal plate? pipe running from manifold to intake on right side. just take off? that will make replacing the valve cover gaskets alot easier.. lol
thanks
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Old Aug 4, 2014 | 08:48 PM
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The ECM will call for EGM after some steady state cruizin' with coolant temps >175deg F.
To overcome this you can have the ECM reprogrammed or insert a diode in a cable between the EGR command line and the EGR Temp sensor line. Here simply splice in the new cable into each line.
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Old Aug 4, 2014 | 09:33 PM
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Originally Posted by shawnsdad
I have looked and looked and read so many post about removing my egr and smog from my 86. but no real answers. just want to clean up under the hood. i can leave the pump on motor. i dont have emissions so nothing to worry about. so for smog just remove everything and when i take the lines off the manifolds what do ya cork them with? and egr. thers a temp sensor. just unplug? is there a egr removal plate? pipe running from manifold to intake on right side. just take off? that will make replacing the valve cover gaskets alot easier.. lol
thanks
Let me ask you this...

why would you want to remove this stuff?

unless you are planning to "upgrade" the engine internals, this "stuff" isn't hurting anything. In fact, on a motor designed to run WITH EGR and other things, as stated above the ECM will look for EGR under certain conditions and when it does not get it....it sets a code and throws itself back into OL mode.

These engines are not 60's muscle car engines. They are made to work WELL with this "stuff". People start hacking up a technological advanced engine control system and end up with a POS that does not run right and they wonder why..? or they trash talk the car like its the problem.

So, again, WHY? because its not esthetically appealing under the hood? Hint: no ones looking under the hood ! They're looking at the car.

My God, you got a friggin Corvette ! what else could a human being ask for?
Any idea of how many people on this planet are only able to DREAM of driving a Corvette? much less owning one?

I'm not trying to pick a fight here....I am just lost on why people want to start hacking up the engine controls and emissions the minute they THINK they know better than a GM engineer....

My advice as someone that's owned muscle cars AND Corvettes....leave it alone until you're ready to pull $10,000 out of your retirement to 'build' a motor. Nothing wrong with this one as is.. In fact, leaving it alone only increases the value of the car. Start fuc&ing with it and the value drops like a stone.
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Old Aug 4, 2014 | 09:48 PM
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leesvet is absulutely correct....you can't just hack up a vette engine to beef it up.....better to get a fsm, and stay on the forum for awhile before working on your car...you're not going to clean up or beef up a 86 without some serious investment.. sometimes stock is the way to go...unless you have the bucks...here's a pic of how to properly clean up a vette engine it isn't cheap....
Attached Images  
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Old Aug 4, 2014 | 11:22 PM
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Geeezzz go easy on the Guy. He is not saying he is smarter than GM designers. He is just a guy and its in all of our blood to disconnect emission controls. When ur starting out, Good or Bad we feel like we did something Right/Positive & Something we were suppose to do but anyways Dude Depends on what u will be doing with ur vette It does help a lot with getting more MPG and here is why
http://www.tuneruniversity.com/blog/...ing-you-money/
But if u don't want to contaminate the incoming fuel/air mixture and just have to keep it as cool as possible and don't care about MPG and want a cleaner engine compartment here is a nice plate for under 20 bucks for a block off and just put all the stuff away somewhere in a box and save it.
http://www.ebay.com/itm/Drag-Racing-Camaro-Corvette-TPI-Eliminates-EGR-Billet-Aluminum-Block-Off-Plate-/231298869815?pt=Motors_Car_Truck_Parts_Accessories&hash=item35da7caa37&vxp=mtr
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Old Aug 5, 2014 | 05:19 AM
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You can use Tunerpro with the moates aldu1 cable to connect to your laptop, with the Moates Ostrich you can change settings on the fly. No need to remove the chip and get it burnt it does it instantly as you save the changes, it does this by the additional chip when it saves your changes it also saves it on your chip in the ecm.

I have run my vette without the EGR valve for 8-10 years, you just need to remove the ERG check in tunerpro and you will no longer get EGR codes. Your engine does not blow up if the EGR is not operational, it is an emissions device to reduce NOX emissions by lowering combustion temperatures by recirculating some exhaust back to the inlet manifold and engine.

It does this when you are on a steady cruise, it will not operate at idle or wide open throttle.

Tunerpro downloads. (you will need all of the following)

http://www.tunerpro.net/downloadApp.htm

Tunerpro downloads bin files etc.

http://www.tunerpro.net/downloadBinDefs.htm

Moates ALDU1 cable.

http://www.moates.net/aldu1-and-cabl1-p-127.html

Moates Ostrich emulator.

http://www.moates.net/ostrich-20-the...eed-p-169.html

Last edited by gerardvg; Aug 5, 2014 at 05:23 AM.
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Old Aug 5, 2014 | 06:46 AM
  #7  
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That's some great Info Thanxs. Im going to start with a set up like that for my laptop
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Old Aug 5, 2014 | 10:58 AM
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They make little bolt-in plates to cover the hole on the intake manifold, and you can rewire the solenoid such that it won't set a code, but I never did that and rarely got the code 32. You normally only see it on hwy cruise anyway. You can put plugs over the exhaust manifold AIR pipe inlets.

The hole in the exhaust I didn't worry with as I installed headers instead when I did the swap out.
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Old Aug 5, 2014 | 06:24 PM
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note to self... dont ask a question unless you are constipated and need an *** reaming!!! thanks for cleaning me out...
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Old Aug 6, 2014 | 01:34 PM
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sorry if i sounded rough to you.....I have a 85 and will help you..... like everybody else on this forum..... do want you want to that car....just take it one project at a time for each thread...you'll get lots of help and advice....good luck
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Old Aug 6, 2014 | 03:21 PM
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Hey also look into the throttle body coolant delete. No reason to run coolant to the throttle body IMO to warm it unless ur living in the Artic Circle and by removing that it just plain looks nicer.
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Old Aug 6, 2014 | 05:42 PM
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AIR (smog pump), and EGR need to be turned off in the programming. Tunerpro works for a lot of people, but every time I try I want to chuck my laptop out of the car. I use Tunercat, and Datamaster, because both are much more user friendly. They do cost more, but are worth it in my opinion.
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Old Aug 6, 2014 | 07:28 PM
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its kool.. it was the first reaming i got that made me wonder why i was here.. in time was planing a transplant motor..

Last edited by shawnsdad; Aug 6, 2014 at 07:31 PM.
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Old Aug 6, 2014 | 11:37 PM
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check out vader 86's website....it'll show you everything, and I mean everything you can do to your present engine...it's strong already and you can step it up if you want. shoot us some pics....coolant bypass and egr block off is relatively cheap process...removing smog is a little more involved because you need a replacement pully and bracket...and possible a different belt.....
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