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

Quick question for you guys

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Old Dec 10, 2004 | 10:08 AM
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Default Quick question for you guys

The more I think about this the more I think I'm just going to do it.
When my EM long tubes show up, I'm going to just pull all the emissions crap out. I don't need cats in MI so that's no problem. What all can I remove? What do I need to block off? and the last and most important is ------- Will removing the EGR and blocking off the holes make the System light come on and give me a code?
two years ago my air pump went out and I pulled the pump. That gave me a code, so I plugged it in but without the pump it's self. So I know I can get around that part, I just don't know about the blocking off the EGR holes in the intake and what that would do.
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Old Dec 10, 2004 | 01:54 PM
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Originally Posted by fsr402
The more I think about this the more I think I'm just going to do it.
When my EM long tubes show up, I'm going to just pull all the emissions crap out. I don't need cats in MI so that's no problem. What all can I remove?
EGR valve, secondary air injection pipes, AIR pump and associated tubing.

What do I need to block off? and the last and most important is ------- Will removing the EGR and blocking off the holes make the System light come on and give me a code?
You'll need to block off the EGR and air injection holes at the back of the intake. TPiS has a nice set on their website (www.tpis.com). You will also need to get a new tune to program out the codes for missing EGR and AIR pump.

It's a piece of cake and really helps clean up the engine compartment.
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Old Dec 10, 2004 | 02:15 PM
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Originally Posted by fsr402
The more I think about this the more I think I'm just going to do it.
When my EM long tubes show up, I'm going to just pull all the emissions crap out. I don't need cats in MI so that's no problem. What all can I remove? What do I need to block off? and the last and most important is ------- Will removing the EGR and blocking off the holes make the System light come on and give me a code?
two years ago my air pump went out and I pulled the pump. That gave me a code, so I plugged it in but without the pump it's self. So I know I can get around that part, I just don't know about the blocking off the EGR holes in the intake and what that would do.
All you need is a 1996 LT4 egr block off plate with gasket sold at any GM dealer. Cost is around $5. On long drives it will set a code so programming is recommended.
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Old Dec 10, 2004 | 02:17 PM
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Ok now how would I reprogram it on a 93? It does not have a flashable chip.
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Old Dec 10, 2004 | 02:23 PM
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Originally Posted by fsr402
Ok now how would I reprogram it on a 93? It does not have a flashable chip.
It may 1993 was a split year. My car is an early 1993 and I have an ECM with a removable chip. Late 93 they switched to PCM. Please verify which you have.
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Old Dec 10, 2004 | 02:29 PM
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Sent you a PM with who I use.
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Old Dec 10, 2004 | 02:31 PM
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Umm, ok. I had a hypercrap chip at one time so I am assuming that I have a removable one. Right? I don't know crap about this stuff, but I'm trying to learn.
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Old Dec 10, 2004 | 02:34 PM
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Originally Posted by fsr402
Umm, ok. I had a hypercrap chip at one time so I am assuming that I have a removable one. Right? I don't know crap about this stuff, but I'm trying to learn.
Yes, and don't worry about it we are all her for the same thing, an education. This forum is amazing!
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Old Dec 10, 2004 | 02:44 PM
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Thank you for your help.
I think I will start by getting the stuff off the car then talk to that programer and have a chip made.
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Old Dec 10, 2004 | 02:48 PM
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Originally Posted by crheinish
It may 1993 was a split year. My car is an early 1993 and I have an ECM with a removable chip. Late 93 they switched to PCM. Please verify which you have.
If the car was manufactured in '93 as a '94 model year, then it will use a PCM like the '95-'96 have. I know of no '93 models with a PCM (they all have flashable EEPROMS).
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Old Dec 10, 2004 | 03:10 PM
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Originally Posted by cprgmr
If the car was manufactured in '93 as a '94 model year, then it will use a PCM like the '95-'96 have. I know of no '93 models with a PCM (they all have flashable EEPROMS).
You are correct! The reason I ask is I have found people that mistake what year their car is.
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Old Dec 10, 2004 | 03:19 PM
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Mine's a Ruby, so I KNOW it's a 93..
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