It's a brown wire with a connector. It's located on the firewall on the driver's side to the left of the Power Steering booster. Pull the connector apart before checking the timing. Be sure to re-connect afterwards.
There is no such thing as a timing advance wire on a 84 El Camino.
It will be a tan wire with a black stripe that breaks out of the wireing harness on the fire wall but close to the dist.
If it is the same as my 1995 k2500 it is a single tan wire with a black stripe underneath the glove box inside the cab.
losen the distribiter have the eltronc advance un pluged normal locater on leaft side by fire wall a singel wire look 4 your makes with a timing light
It is a brown wire connected to the distributor.
looking for help on the brake light ground wire location for 1999 gmc suburban 4x4
AnswerMost of the time, the steps to take to set the timing are on the catalyst sticker under the hood. But first, you must get the vehicle into base timing (usually disconnect a wire from distributor). Remove distributor hold down bolt, hook up timing light to #1 spark plug wire, start engine, and align timing mark (0°) Once this is set, reconnect the wire you had to disconnect for base timing. Timing advance will automatically set itself. if it doesn't, you have a faulty timing advance mechanism on the distributor. You can check timing advance by pointing the timing light at scale (while hooked up to #1 spark plug wire) and rev the motor. Timing marks should move up the scale.On many GM cars and trucks the wire that you disconnect is solid gray in color, it is in the wiring harness on the firewall, the wire has a black plug for separating when doing the timing.
It retards the timing so the engine is easier to start. After it starts, it advances the timing back to an advanced position for best engine performance.
You have to unplug the distributor advance wire, it's a tan or brown colored wire, set to 0 (or up to about 8 advance) then reconnect the wire.
buy a timing light. clip it to the #1 plug wire. loosen the bolt on the distibutor. Unplug the timing advance. start the engine Point it to the harmonic balancer and turn the distributer until the timing mark on the timing cover lines up with the mark on the harmonic balancer. Tighten the distibutor bolt. plug in the timing advance.
Run engine to temp. Turn off key. Unplug tan wire under hood. Start vehicle. Set timing at 0. Turn truck off plug in tan wire. Disconnect battery for 5 minutes
unplug the wire that says tach on the dist cap that's the one that reads rpm do this while car is off if this wire is unplugged it will not tell the computer to advance or retart the timing then set your timing to 8 degrees tighten it up and plug it in and that's how you set the timing