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Struggling with a hiccup...

Discussion in '2nd Gen 4Runners (1990-1995)' started by wavejumper, Feb 21, 2023.

  1. Feb 21, 2023 at 2:45 PM
    #1
    wavejumper

    #1
    wavejumper [OP] New Member

    Joined:
    Feb 21, 2023
    Member:
    #31388
    Messages:
    1
    Gender:
    Male
    First Name:
    Jeff
    Vehicle:
    93 3.0 4runner 4x4 MT
    93 3.0 The issue is at idle you can very faintly hear a hiccup every so often but you really have to listen as it is pretty smooth - if you throttle up to say 1700rpm - it will run for a bit then drop 200-300 rpm then jump back up - over and over. --------..--------..--------..--------..---- that sort of thing. If you hold the throttle higher (3000rpm) it just runs rough.

    To date the following are all new: fuel pump, fuel pressure regulator, O2 sensor (Bosch), all vacuum lines, plugs, wires, cap, rotor, distributor, ignition coil, igniter, intake gasket, PCV valve, had the ECU all tested OK.

    Any ideas? Please... lossing my mind over this... ;)
     
    wavejumper, Feb 21, 2023
    #1
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