lizbeth
Senior Member
Posts: 150
Loc: Az,desert rat
Reg: 06-22-03
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07-23-11 07:46 AM - Post#2117090
Help please...I have a 91 s-10 4.3 automatic 2 wheel drive. Want to check the timing..My chiltons says "see the decal under the hood".No decal at all.This p/u has been around the block many times & also repainted.Cleaned & marked the damper,but with timing lite on=no show.Also once heard the dist plug in on back of dist must be unplugged?? Please let me know the right way to do this..
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 Chevytech
Subject Matter Expert - Senior Member
Posts: 3923
Loc: Twin Cities, Minnesota, U...
Reg: 04-25-04
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07-23-11 10:57 AM - Post#2117148
In response to lizbeth
For the Small block TBI trucks, the timing specification is Zero degrees BTDC.
Here is some information I saved for a 1993 S/T truck.
Check and see if your truck is the same.
On 1993 V6 S/T trucks, to set the ignition timing, unplug the set timing connector. The timing connector breaks out of the wiring harness below the heater case in the passenger compartment on the passenger side of the firewall. It is a single wire connector with a tan wire with a black strip.
Image source
http://0.tqn.com/d/autorepair/1/0/Z/X/ 41927325.gif
For those of you that are wondering why you are not getting replies to your thread:
Did you give the model, year, engine, fuel system type, and transmission information?
If your vehicle has been altered from stock, let us know about that too. |
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 gchemist
Member #271 Senior Chevytalk Moderator
Posts: 25442
Loc: Austin, TX 78748
Reg: 05-09-00
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07-23-11 05:21 PM - Post#2117246
In response to Chevytech
Zero is the factory timing. Truck owner sometimes add up to 4 degrees for more power and efficiency. Any more timing requires a chip upgrade.
Here is more TBI information: http://www.cfm-tech.com/GM_tbi_tuning_tips.htm
'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE
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popcorn89
Contributor
Posts: 178
Reg: 12-22-10
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07-24-11 08:33 AM - Post#2117413
In response to gchemist
the sticker is located on top of the radiator cover.
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