1994 Chevy S-10 engine timing

Tiny
CHRISTINEBOSSDR
  • MEMBER
  • 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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Tuesday, July 13th, 2010 AT 3:34 PM

4 Replies

Tiny
RASMATAZ
  • EXPERT
You need to disconnect the EST wire tan and black wire-see below info


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

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Tuesday, July 13th, 2010 AT 3:50 PM
Tiny
MERLIN2021
  • EXPERT
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!
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Tuesday, July 13th, 2010 AT 3:53 PM
Tiny
WILLARD TAYLOR
  • MEMBER
It is well hidden tan wire with black stripe taped to harness coming out of passenger side kick panel. Has took me 14 years to find
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Wednesday, January 1st, 2020 AT 9:46 AM
Tiny
TOUGHDIVER
  • EXPERT
Hi,

You could also jumper A TO B terminal at the 16 pin data link connector under drivers dash it will disable timing advance also. Hope this was helpful.

Thank you
Joe T.
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Thursday, January 2nd, 2020 AT 4:55 PM

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