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Swapped engine out of '89 with '91, replacement engine came with wiring harness attached. Connected all wires, starter cranks, fuel pumps buzzes but no start. Bentley manual says 89-93 have Volvo/Chrysler ignitions with a one-way connection to the ICU (ignition control unit) and disconnecting harness from ICU will cause damage and require replacement of harness and/or ICU.
Checked and found not spark at spark plugs (checked #1 & 2) - suspecting ignition problems. Hoping that ICU or harness (or both) do not have to be replaced. HELP?!
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