To set/check timing on a '94-95 5.7L TBI truck you disconnect the IC Bypass wire from the distributor by disconnecting the "set timing" connector located under the dash, in the ECM harness. It's a Tan&black wire. Doing so should set DTC 42.
And, yes, your timing should advance as soon as you reconnect the connector.
Roger
Last edited by bubba2; 04-19-2005 at 04:45 PM.
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