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  • Emission Control Air Pump

    I have an 88 Cutlass Supreme Classic with a 307V8. My emission control air pump locked up on me so I cut the belt off and am running without it, and of course the SES light comes and goes. Can this be taken off? If so what has to be done? WV does not have an emission inspection so there is no worry about that.

  • #2
    Not having the AIR pump operating will only trigger the check engine light during warm, this is due to your O2 sensor detecting a rich mixture. If it's on during normal operation then you have other issues. Simply removing the light won't fix them, jump the A & B terminal with a paper clip on the ADL connector below the radio and count the flashes the Check Engine light gives you, the first set of flashes will give you the first digit and then a small pause will occur before the next set of flashes for the second digit. This will repeat 2 more times and then move on to the second fault code.
    Here are some fault codes, I have an extensive list in my GM Chassis manual if other codes are needed:

    87-90 5.0L VIN Y
    13 Oxygen sensor voltage stays between 0.35 and 0.55 volts for 60 seconds. Engine was at normal operating temperature and had been running for at least 2 minutes after start with a throttle angle above 5%.
    14 Coolant temperature sensor signal indicates a temperature of over 275° F for 2 seconds.
    15 Coolant temperature sensor signal indicates a temperature colder than -27° F for 30 seconds after the engine has been running for at least 30 seconds.
    21 TPS voltage was above 2.5 volts for 8 seconds when the MAP sensor signal showed manifold vacuum to be 15 pounds or more.
    22 TPS voltage was under 0.2 volts for 2 seconds when the engine was running.
    23 Inlet air temperature sensor signal showed an air temperature below -22° F after the engine has been running for 5 minutes.
    24 When engine speed was between 1200 and 4400 RPM and throttle position angle was less than 2%, the MAP signal showed low voltage (high manifold vacuum) for at least 5 seconds.
    25 Inlet air temperature sensor signal showed an air temperature over 302° F after the engine has been running for 5 minutes.
    32 EGR open command did not change MAP sensor signal. Normal EGR flow should cause slight decrease in manifold vacuum which would change MAP sensor signal.
    33 MAP sensor signal voltage was too high (low vacuum) for 5 seconds when throttle opening was under 4%.
    34 MAP sensor signal voltage was too low (high vacuum) when engine speed was under 1200 RPM or the engine speed was over 1200 RPM with a throttle position angle above 21%.
    42 The EST signal did not change when the ECM applied bypass voltage to the ignition module.
    43 The ECM did not detect a knock signal during near wide open throttle operation with coolant temperature above 194° F or the knock signal was present for 5 seconds or more during normal engine operation.
    44 Oxygen sensor voltage was under 0.2 volts for 50 seconds of closed loop operation.
    45 Oxygen sensor voltage was over 0.7 volts for 30 seconds of closed loop operation with a throttle angle between 2% and 20%.
    51 PROM error.
    52 CALPAK error.
    54 Fuel pump voltage was not present at fuel pump sense line for 2 seconds after the ECM has sent the fuel pump on command.
    55 ECM error. Replace ECM.
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    • #3
      I have a emission control air pump from my 86 cutlass supreme, that i just swapped a 71 olds 350 into and will no longer be needing the pump. Its yours for FREE if you wanna pay the shipping? lmk john

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      • #4
        Originally posted by MrLightning View Post
        I have a emission control air pump from my 86 cutlass supreme, that i just swapped a 71 olds 350 into and will no longer be needing the pump. Its yours for FREE if you wanna pay the shipping? lmk john
        Thanks John, but I think I will just take mine off. With the air pump belt off, my SES light comes on after car gets warm and stays on. Is that normal? I will check my factory service manual for the ADL plug. I had the radio out and did notice a stray plug, was that the ADL plug?

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        • #5
          The light should not stay on after it's warmed up but it's possible the computer is not sensing the AIR switching valve off the AIR pump.
          Here is more info on the AIR system:

          http://tech.oldsgmail.com/emis_AIR.php

          It's mounted directly below the dash, more info here as well:
          http://tech.oldsgmail.com/ecm_aldl.php
          Lightning Rods repair service:CLICK HERE
          Seller Feedback:CLICK HERE
          1988 H/OCA Advisor
          88 H/O #1 of 4
          88 CSC White/Claret - T-tops
          88 H/O Triple Black
          87 442 Black/Gray - T-tops
          85 442 White/Blue - T-tops
          85 442 White/Blue - T-tops
          85 442 White/Claret - T-tops
          85 442 White/Sage
          84 H/O Aero Commemorative #2199 - Sunroof
          83 H/O #2400 Sand Gray - Sunroof
          83 H/O #1607 Sand Gray - T-tops
          83 H/O #727 Maple
          "Keep them Rockets lit!"

          Comment

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