Mechanics

CHEVY ENGINE TIMING

1994 Chevrolet S-10

Engine Performance problem
1994 Chevy S-10 6 cyl Two Wheel Drive Manual

When timing engine is there a defuser or wire to disconnect to stop timing advance?
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ChristineBossDR
July 13, 2010.




You need to disconnect the EST wire tan and black wire-see below info


http://www.2carpros.com/forum/automotive_pictures/12900_est_4.jpg

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Tiny
Rasmataz
Jul 13, 2010.
V6 IGNITION TIMING 1. Set parking brake, block drive wheels and place transmission in Neutral or Park. Warm engine to normal operating temperature. Turn A/C off (if equipped). Ensure Malfunction Indicator Light (MIL) is off. 2. Disconnect Tan/Black Electronic Spark Timing (EST) by-pass connector wire. DO NOT disconnect 4-wire connector at distributor. 3. On models where engine computer is located underhood, on right fenderwell, by-pass connector which is a single Tan/Black wire, breaks out of wiring harness near engine computer harness connectors. 4. On models where engine computer is located in passenger compartment under right side of instrument panel, by-pass connector which is a single Tan/Black wire and breaks out of wiring harness where heater box and carpet meet on passenger side floor. Pull back carpet to expose single Tan/Black wire and connector on outside of control module harness. 5. On all models, connect timing light to No. 1 spark plug wire. Check timing and adjust if necessary. See V6 IGNITION TIMING table. Reconnect EST by-pass connector, and clear ECM trouble code. NOTE: The location of the EST by-pass connector has been updated per General Motors Service Manual Update number 41-65-41, dated January 4, 1995.
Timing is 0 degrees at idle, both auto and manual trans. Soory Razz! But this IS clearer!

Merlin2021
Jul 13, 2010.

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