Section 10.12.150 Engine Switching


Prior to the adoption of Ord. 03-2002 on 10/01/2002, Section 10.12.150 read as follows.

        A.    The following adjustments may be required if deemed necessary by the Division to further control CO emissions. If required by the Division, the following adjustments shall be performed on all 1980 and older vehicles (where applicable) that fail the I/M test. These adjustments, if required, must be performed by a certified emissions tester or certified emission repair technician before a vehicle will be eligible for an emissions waiver.
    B.    The high altitude specifications for idle speed, idle air/fuel mixture, ignition timing, and dwell, shall be determined for the purpose of adjustment. If no high altitude specifications are available, the technician/tester shall refer to the emissions tune-up specification decal in the engine compartment or sea level specifications taken from a suitable reference manual for proper specifications. Fuel control systems designed with sealed, tamper-resistant adjustment screws for air/fuel mixture shall be adjusted according to manufacturer’ s specifications and resealed. On vehicles that have limiter caps on the fuel control systems, the limiter caps shall be removed and the air/fuel ratio adjusted to meet manufacturer’ s specifications and the proper limiter caps shall be reinstalled. The adjustment procedures shall be as follows:
    1.    Failed vehicle readings of CO and HC shall be recorded before any adjustments are made;
    2.    The dwell, if applicable, shall be checked with a dwell meter to determine if it is within the recommended tolerance of +2 degrees of specifications. The dwell shall be reset if it exceeds this tolerance.
    3.    The idle speed shall be checked with a tachometer to determine if it is within +50 rpm of the manufacturer’ s specifications. If it is not, it shall be set to within +50 rpm of the manufacturer’ s specifications;
    4.    The ignition timing shall be checked, using a timing light or engine analyzer, to determine if it is within +4 degrees to -2 degrees of the recommended setting while the engine is idling at the specified speed. If the timing exceeds this tolerance, it shall be adjusted until it falls within +4 degrees to -2 degrees of the recommended setting;
    5.    The idle air/fuel ratio shall be adjusted according to manufacturer’ s suggested procedures and/or specifications using an infrared analyzer, propane enrichment kit, or tachometer;
    6.    The choke shall be checked and adjusted according to manufacturer’ s suggested procedures and/or specifications, if the choke is not sealed;
    7.    After completing the preceding steps, the idle speed shall be readjusted to manufacturer’ s specifications;
    8.    The performed adjustments shall be entered in the required data base of the analyzer if required by the Division.
    9.    If the adjustments are required by the Division, a maximum charge will be adopted as part of Section 10.12.250.
    C.    The vehicle shall then be retested and if it continues to fail, other repairs shall be performed as necessary or waiver procedures should be followed if the vehicle qualifies. (Ord. 7-1996 § 1 (part))
    A.    Engine switching shall be allowed only in accordance with E.P.A. policy.
    B.    Vehicles not meeting the requirements of this section Section 10.12.150 shall be deemed as tampered and dealt with in accordance with the tampering provisions of this chapter Ordinance.
    C.    All 1984 and newer vehicles with switched engines shall be verified to meet E.P.A. requirements by the Division prior to issuance of a certificate of compliance.
    D.    For 1968 to 1983 vehicles, having an engine other than the original engine and emission control configuration are deemed as tampered. These vehicles must meet the HC and CO standards for the model year of the vehicle in order to receive a certificate of compliance, and are not eligible for a certificate of compliance - waiver, unless they are restored to the original engine and emission control configuration. or a configuration approved by the Division. (Ord. 7-1996 § 1 (part))