REF: previous posts/threads were under the subject: "Help: where to buy GM
style electrical connectors"
the car: 1994 Olds 88 Royale, 3800 engine, L27
Two scan codes are persistant/current:
1. P0321 - 18X Interrupts Lost
2. P0341 - Intermittent Cam Signal
I did the pertinent continuity/ohm tests on the wiring to cam and crank
sensors, ICM, 8 way jumper harness, and PCM.
I tried a new crank position sensor: same codes. The cam position sensor was
recently replaced by the owner.
I just performed the diagnostic procedure on the Spark Reference Circuit. The
Spark Reference voltage at the PCM backplane, pin RB6, is 2.92V with engine
running. GM Spec calls for 2.5V.
In a similar test, Fuel Control, pin RB8, is 2.45V. Spec calls for 2.5V. Seems
What do you think? Is the SWS/amp or Buffer/Amp in the ICM bad, requiring
replacement of the ICM?
remove all "f"'s from address