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  • #1

    !AIR,!EGR questions

    While I'm installing the cam and heads should I remove the air pump and EGR systems? I hear differing stories as to what will happen. like clogged cat and oil leaks to nothing will happen to it will run better. I figure that I only put about 1500 miles on the car cruising and problaly 30-40 1/4 mile passes a year so If I don't need them and they take up room in the engine bay why not take that junk out? If I remove them will I need to program them out or will they not affect the PCM?
    Thanks
    Skip
    95Z,A4 (w/TCI trans control unit), P&P LT1heads,Edelbrock shorties, CC233/242-.569/.576 114*LSA cam Crane 1.6 RR,LT1_editted. Ford 30#SVO's Vigi 3200 converter and a 150 shot of nitrous
    Tags: None
  • #2
    Can't answer the question regarding codes and programming unless you tell us what year your car is. Suggestion - Include a short "signature" with vital info like year, model, trans, any major mods, etc.
    Fred

    381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

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    • #3
      removing them will cause the ses light to come on and you will fail inspection (even if it is just a visual inspection and not a tail pipe emissions test). There should be no problem running the emissions control with the proper cam and heads selection.
      96 WS6 Formula: Ram Air, 383 Stroker, Ported LT4 Heads and Manifold, 1.6 Crane Rollers, 58MM T.B., AS&M Headers, Borla Exhaust, Meziere Elec. H2O Pump, Canton Deep Sump Oil Pan, 100 HP OF TNT N2O!! , T56 Conversion w/ Pro 5.0 shifter, SPEC Stage 3 Clutch, Hotchkiss Subframe Conn., Lakewood Adj. Panhard Bar, Spohn Adj. LCA's, BMR Adj. T.A., Custom 12 bolt w/ 3:73's, Moser Axles, Eaton Posi, Moser Girdle
      11.6 @ 123mph (1.6 60' - getting there )

      Comment

      • #4
        That's why we need to know the "year"... not all LT1's are the same. On the 93-95 models, you can unplug the AIR pump and remove the entire system with no code/SES, as long as you have a good fuse in the circuit. 96 and newer OBD-II cars have a flow detection device, to it is difficult to remove without getting a code.

        Same with EGR.... the OBD-I models will GENERALLY not set a code/SES, because the diagnostice test is not very sensitive. OBD-II it is almost guaranteed you will get the code.
        Fred

        381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

        Comment

        • #5
          either way, he'll fail inspection.
          96 WS6 Formula: Ram Air, 383 Stroker, Ported LT4 Heads and Manifold, 1.6 Crane Rollers, 58MM T.B., AS&M Headers, Borla Exhaust, Meziere Elec. H2O Pump, Canton Deep Sump Oil Pan, 100 HP OF TNT N2O!! , T56 Conversion w/ Pro 5.0 shifter, SPEC Stage 3 Clutch, Hotchkiss Subframe Conn., Lakewood Adj. Panhard Bar, Spohn Adj. LCA's, BMR Adj. T.A., Custom 12 bolt w/ 3:73's, Moser Axles, Eaton Posi, Moser Girdle
          11.6 @ 123mph (1.6 60' - getting there )

          Comment

          • #6
            Depending on the year of your car, it may or may not throw a code. The earlier 4th gens are NOT very sensitive on the AIR, but probably will detect the deleted EGR.

            It can be programmed out very easily.

            I have the Air and EGR deleted from my 93 Formula, and I aced the emissions test in OH. But I also have a cat on there.
            I am not sure what kind of inspection laws Michigan has, but if you have a cat, and let the car warm up, you should have no problem with the test.

            Randy
            99 TA "RBLUTA" - NBM, M6, Whisper Lid, SLP Fan Switch, 160* Thermo, SLP LM, BMR STB & LCA's.


            ***SOLD*** It will be missed!!
            93 Formula "FRMLAV8" -383 Stroker

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            • #7
              Updated info

              Fred, It's a 95 Z with an A4, I'm installing a CC cam(233/242 .534-.540 lift on 114*lsa. Edelbrock shorty headers are going on too. I use LT1_edit on it.) I updated my sig too.
              I bought a NOS 5176 instruction manual from you about two years ago
              Skip
              95Z,A4 (w/TCI trans control unit), P&P LT1heads,Edelbrock shorties, CC233/242-.569/.576 114*LSA cam Crane 1.6 RR,LT1_editted. Ford 30#SVO's Vigi 3200 converter and a 150 shot of nitrous

              Comment

              • #8
                I'm see so many people have emissons test in other places. We do not have any kind of tests here. They just ask you to honk the horn and turn on the lights and blinkers and thats it.
                ______________________________
                94 Camaro Z28 T56

                Comment

                • #9
                  Originally posted by N20LT4Bird
                  either way, he'll fail inspection.
                  NO emissions inspections for him to worry about in Michigan.
                  Former Ride: 2002 Pontiac Trans Am WS6 - 345 rwhp, 360 rwtq... stock internally.

                  Current Ride: 2006 Subaru Legacy GT Limited - spec.B #312 of 500

                  Comment

                  • #10
                    Originally posted by Jay 02 TA ws6
                    NO emissions inspections for him to worry about in Michigan.
                    We dont have an "emissions inspection" in upstate NY either, but as a NY state inspector, I know that a car that has the air pump and egr system removed will fail. Unless its different in Michigan, the car would fail visually for missing the components.
                    96 WS6 Formula: Ram Air, 383 Stroker, Ported LT4 Heads and Manifold, 1.6 Crane Rollers, 58MM T.B., AS&M Headers, Borla Exhaust, Meziere Elec. H2O Pump, Canton Deep Sump Oil Pan, 100 HP OF TNT N2O!! , T56 Conversion w/ Pro 5.0 shifter, SPEC Stage 3 Clutch, Hotchkiss Subframe Conn., Lakewood Adj. Panhard Bar, Spohn Adj. LCA's, BMR Adj. T.A., Custom 12 bolt w/ 3:73's, Moser Axles, Eaton Posi, Moser Girdle
                    11.6 @ 123mph (1.6 60' - getting there )

                    Comment

                    • #11
                      No inspections of any kind in Michigan - visual or otherwise...
                      Former Ride: 2002 Pontiac Trans Am WS6 - 345 rwhp, 360 rwtq... stock internally.

                      Current Ride: 2006 Subaru Legacy GT Limited - spec.B #312 of 500

                      Comment

                      • #12
                        Originally posted by Jay 02 TA ws6
                        No inspections of any kind in Michigan - visual or otherwise...
                        None in Wisconsin either, but I still would not remove that stuff if you intend to keep the car street driven. If you want to go race only, fine. What if you want to sell the car? It's value is damaged. It cannot be registered in many states because it will fail the visual. A dealership will not take it on trade if it is butchered up.

                        It is your car now, but it most likely will not always be yours. What about the next owner? In the end, it is yours to do whatever you want to, screw the next guy, right? (or screw yourself if you cannot sell it in a few years)

                        Comment

                        • #13
                          Originally posted by Jay 02 TA ws6
                          No inspections of any kind in Michigan - visual or otherwise...
                          If that is true...thats my kinda state.
                          96 WS6 Formula: Ram Air, 383 Stroker, Ported LT4 Heads and Manifold, 1.6 Crane Rollers, 58MM T.B., AS&M Headers, Borla Exhaust, Meziere Elec. H2O Pump, Canton Deep Sump Oil Pan, 100 HP OF TNT N2O!! , T56 Conversion w/ Pro 5.0 shifter, SPEC Stage 3 Clutch, Hotchkiss Subframe Conn., Lakewood Adj. Panhard Bar, Spohn Adj. LCA's, BMR Adj. T.A., Custom 12 bolt w/ 3:73's, Moser Axles, Eaton Posi, Moser Girdle
                          11.6 @ 123mph (1.6 60' - getting there )

                          Comment

                          • #14
                            Originally posted by tabahr
                            A dealership will not take it on trade if it is butchered up.

                            It is your car now, but it most likely will not always be yours. What about the next owner? In the end, it is yours to do whatever you want to, screw the next guy, right? (or screw yourself if you cannot sell it in a few years)
                            I keep ALL the original parts from the car and IF I sell it I will offer to return the car to original condition. I will also inform the "next guy" about what was done to the car as far as me "butchering up" the car. I'm not out to "screw" anyone.

                            Poor choice of words.

                            Plus the car is almost ten years old now (95) and not worth much as far as re-sale value anyway. I'm 50 years old too and planning on retiring at 62 to enjoy racing it.
                            Attached Files
                            95Z,A4 (w/TCI trans control unit), P&P LT1heads,Edelbrock shorties, CC233/242-.569/.576 114*LSA cam Crane 1.6 RR,LT1_editted. Ford 30#SVO's Vigi 3200 converter and a 150 shot of nitrous

                            Comment

                            • #15
                              Sorry about the word choice. I didnt intent to flame you. You have a point in the age of the car, it's small value and your intentions to keep it for racing. I've been through it with an 86 I had. I dropped a non-emissions carb'd 350 in it, and had a heck of a time selling it. (it was only 4 years old at the time) Nobody wanted it on trade and most people looking at it were not into that type of thing.

                              I didn't intend to sound overly critical!

                              Comment

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