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  • #1

    Bypass VATS

    So I thought my key was bad, went and bought another key from my GM dealer. Doesnt work. Went back and he showed me the tester. Both keys work great and have the same number associated with them. After talking with the service tech guys they think that the ignition module its self has gone bad.

    How the car has started so perfectly for the last week is beyond me, it simply will not start today. I'm not going to sweat the small stuff, I paid a lower level so I expect these issues.

    To disable VATS it looks like I guy the wire going to the key, throw in a resistor with my value of ohms and that should just send the PCM the correct electrical signal without even needing the chip part of the key.

    Here is the write up I found, there are many others like it: http://vats.likeabigdog.com/


    Before I start hacking into this car, I want to think of other ideas.


    Here is what happens:

    Put car in N, put key in, turn one position and radio comes on(this confirms the key is good) turn to next part and the fuel pump primes like it does on all cars, turn it to Crank, and the SECURITY light comes on. Wait exactly three min and try it again.


    OK, what do we think.
    1998 Chevrolet Camaro Z28 - 6 Speed
    Tags: back, bad, car, cars, electrical, fuel, good, guys, hey, ideas, ignition, issues, light, ohm, part, pcm, pump, radio, started, stuff, tech, thought, throw, today, week, work
  • #2
    This car is doing the exact same thing
    1998 Chevrolet Camaro Z28 - 6 Speed

    Comment

    • #3
      Didn't watch the Vid because I've done the Bypass on my own car and it is quite simple.
      Just make sure you leave enough wire to work with and make sure all the soldered joints are solid as any loose connection may disable the car.
      Craig
      Semi Retired Street Racer
      2012 Lava Red Mustang GT 5.0 MT82
      GONE BUT NOT FORGOTEN
      sigpic
      NBM `98 Formula M6 HdTp
      1 of 1 Build Date 3/12/98

      "Political correctness is a doctrine, fostered by a delusional, illogical, liberal minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

      "For you who believe all you read, I caution you - you are daily being brainwashed for profit by extremely effective psychology with very little regard to factual accuracy. In short, you're at the mercy of the world's greatest bullshit artists with the morals of a stray tomcat."
      - Smokey Yunick

      Comment

      • #4
        Originally posted by 9T8W66 View Post
        Didn't watch the Vid because I've done the Bypass on my own car and it is quite simple.
        Just make sure you leave enough wire to work with and make sure all the soldered joints are solid as any loose connection may disable the car.

        Did your car do what I described mine doing?
        1998 Chevrolet Camaro Z28 - 6 Speed

        Comment

        • #5
          Originally posted by nascarnate326 View Post
          Did your car do what I described mine doing?
          VATS has 2 modes (that we know of) Pass/Fail which is the normal mode and a Start Default mode.
          Pass/Fail reads the keys resistence and starts the car if the proper value is found. The Start Default happens when the system detects an issue but still allows the vehicle to start (but the light may remain on). The problem is you never know which mode the car will be in at any given time.
          My Car hovered at Start Default for years but would occasionally revert back to Pass/Fail and flash the Security light when the key was turned. So I'd wait my 3 min then try again. It finally took a major turn for the worst last Summer and cycled 20+ times. So after almost an hour of trying to start it I walked home came back 2 hr's later and it fired right up. I took it back home and did the bypass. My first attempt failed because the soldered joints came loose, so that's why I said make sure it's a solid connection. Mine has actually acted up a couple times recently so I'm looking to check it and redo it if need be.
          Craig
          Semi Retired Street Racer
          2012 Lava Red Mustang GT 5.0 MT82
          GONE BUT NOT FORGOTEN
          sigpic
          NBM `98 Formula M6 HdTp
          1 of 1 Build Date 3/12/98

          "Political correctness is a doctrine, fostered by a delusional, illogical, liberal minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

          "For you who believe all you read, I caution you - you are daily being brainwashed for profit by extremely effective psychology with very little regard to factual accuracy. In short, you're at the mercy of the world's greatest bullshit artists with the morals of a stray tomcat."
          - Smokey Yunick

          Comment

          • #6
            Well I trust you and it sounds like we have the same experience. I am going to buy some resisters and give it a whirl.

            I am going to just unplug the connection first, and insert the wires into the plug and see if that works, if it does then I will make the cut.
            1998 Chevrolet Camaro Z28 - 6 Speed

            Comment

            • #7
              When you unplug the connection cut the 2 white wires that run to the lock cylinder and leave as much wire as you can. Then splice the resistors on to that connector then it's just plug and play.

              Good Luck

              And BTW there are literally thousands of F-body guys who have successfully done the Bypass so don't worry.
              Craig
              Semi Retired Street Racer
              2012 Lava Red Mustang GT 5.0 MT82
              GONE BUT NOT FORGOTEN
              sigpic
              NBM `98 Formula M6 HdTp
              1 of 1 Build Date 3/12/98

              "Political correctness is a doctrine, fostered by a delusional, illogical, liberal minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

              "For you who believe all you read, I caution you - you are daily being brainwashed for profit by extremely effective psychology with very little regard to factual accuracy. In short, you're at the mercy of the world's greatest bullshit artists with the morals of a stray tomcat."
              - Smokey Yunick

              Comment

              • #8
                im surprised this hasnt really given me any issues yet. The only time it did i was having an electrical issue that no doubt encouraged it.
                -Joel
                1995 Z28 M6 - AI226/234 - autocross ricer
                1984 Scottsdale K10 - 305/4bbl/4spd


                WTB List:Midwest Chasis DS Loop

                Comment

                • #9
                  Originally posted by JoeliusZ28 View Post
                  im surprised this hasnt really given me any issues yet. The only time it did i was having an electrical issue that no doubt encouraged it.
                  Ah now you did it Joel

                  Start knocking on wood and crossing your fingers lol.
                  Craig
                  Semi Retired Street Racer
                  2012 Lava Red Mustang GT 5.0 MT82
                  GONE BUT NOT FORGOTEN
                  sigpic
                  NBM `98 Formula M6 HdTp
                  1 of 1 Build Date 3/12/98

                  "Political correctness is a doctrine, fostered by a delusional, illogical, liberal minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

                  "For you who believe all you read, I caution you - you are daily being brainwashed for profit by extremely effective psychology with very little regard to factual accuracy. In short, you're at the mercy of the world's greatest bullshit artists with the morals of a stray tomcat."
                  - Smokey Yunick

                  Comment

                  • #10
                    Heres the best way to bypass vats, lol. Do a swap to OBD1, get cheap tuning software, check box in tuning software to turn off vats. And doing a OBD1 swap is REAL easy. PM me and i can tell you all about it and hook you up with tuning software, let me know. Eric L

                    1997 Camaro SS #2819 M6, Red, 3.42, 1 of 27, Ttops, BBK shorty headers, Flowmaster cat back, 1.6 rr, LT4 valve springs, ASAM CAI, Centerforce clutch, runs 12s, breaks 10 bolts.
                    http://s602.photobucket.com/albums/t...20Camaro%20SS/


                    1963 Plymouth Valiant Signet 200, 6.0 LS3, Carb, Rapid Motorsports Dominator 2X cam.
                    http://s602.photobucket.com/albums/t...uth%20Valiant/

                    Comment

                    • #11
                      Originally posted by prorac1 View Post
                      Heres the best way to bypass vats, lol. Do a swap to OBD1, get cheap tuning software, check box in tuning software to turn off vats. And doing a OBD1 swap is REAL easy. PM me and i can tell you all about it and hook you up with tuning software, let me know. Eric L
                      nates probably gonna do it right and go the other way to an LS1 pcm

                      But if you want to do that nate, ive got an extra OBD1 PCM foh sale.
                      -Joel
                      1995 Z28 M6 - AI226/234 - autocross ricer
                      1984 Scottsdale K10 - 305/4bbl/4spd


                      WTB List:Midwest Chasis DS Loop

                      Comment

                      • #12
                        Its up to him, but i think the 1500 could be spent in beter places right now. Id wait till the opti dies to do the swap. But if hes interested, i got a GOOD hookup on tuning software for him. Eric L

                        1997 Camaro SS #2819 M6, Red, 3.42, 1 of 27, Ttops, BBK shorty headers, Flowmaster cat back, 1.6 rr, LT4 valve springs, ASAM CAI, Centerforce clutch, runs 12s, breaks 10 bolts.
                        http://s602.photobucket.com/albums/t...20Camaro%20SS/


                        1963 Plymouth Valiant Signet 200, 6.0 LS3, Carb, Rapid Motorsports Dominator 2X cam.
                        http://s602.photobucket.com/albums/t...uth%20Valiant/

                        Comment

                        • #13
                          Originally posted by prorac1 View Post
                          But if hes interested, i got a GOOD hookup on tuning software for him. Eric L

                          OBD2 FTMFW and I have a good hook up too, the internet. Eventually Ill buy the cable for my laptop, get a copy of the software and do a windows install so I can turn lights off my self. For now a five dollar resistor and solder should work.
                          1998 Chevrolet Camaro Z28 - 6 Speed

                          Comment

                          • #14
                            Going to try this at lunch. Its about .11 different than my key.
                            Attached Files
                            1998 Chevrolet Camaro Z28 - 6 Speed

                            Comment

                            • #15
                              best of luck to u
                              The Original




                              Originally posted by 81DaytonaPaceCar


                              Can you argue that it's "revolutionary"? Perhaps. Just because it's "new" and "different" doesn't mean it's the greatest thing since sliced bread.

                              Comment

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