Power loss and misfire under load at 1800 - 2800 rpm (1986 740 B230F)

Discussion in 'Other Volvo Models' started by Guest_artist, Aug 2, 2004.

  1. Guest_artist

    Guest_artist Guest

    Vehicle is a 1986 740 wagon, 208k, B230F, manual trans. Fuel injection /
    ignition systems are LH 2.2 and EZK117 respectively.

    Per the title, a 'misfire' condition with severe power loss occurs under
    load between engine speeds of 1800 and 2800 RPM. Otherwise a smooth power
    delivery above or below that range. Engine also runs very high at idle
    (>1600 rpm), for which I have grounded out at the CIS test point as a
    'remedy'.

    Ignition primary components check out OK. Engine sensor voltages and
    resistance measurements at the FI ECU seem to be within limits.

    Recent component replacements include plugs / cap / rotor / wires, fuel
    pressure regulator, engine wiring harness, AMM, and timing belt.

    Looking forward to the group's input..

    Thanks,

    Chris
     
    Guest_artist, Aug 2, 2004
    #1
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