When i disconnect the tan/black wire to set timing engine will not hold steady idle. is this normal?

timing. pass side under dash brnor tan with black stripe wire, one connector,disconnect it. check engine light will come on. set your timing, reconnect wire. disconnect battery to clear check engine light.

also keep this in mind when setting the 4.3 if its the vortec Set timing under the following conditions:

* Normal operating temperature.
* Air cleaner installed.
* A/C "OFF."
* Transmission in neutral.
* Disconnect SET TIMING connector.

The location of the set timing connector is inside the cab where the heater box and the carpet meet on the passenger side floor. Pull carpet back to expose the single wire and connectors on the outside of the control module harness. The wire colors are tan with a black stripe. DO NOT disconnect 4 wire connector at distributor. (connector is sometimes found hanging right in front of the blower motor)

Connect timing light and adjust as necessary by loosening hold down bolt and rotating distributor. Tighten hold down and recheck the timing. Stop the engine and connect SET TIMING connector. Clear control module trouble code by disconnecting control module power source. With engine at operating temperature, drive vehicle at part throttle with moderate acceleration and decelerate to idle condition. This will "teach" the control module and return the engine to normal performance.

these are usually located on the firewall on the passenger side under a cover that looks like the letter T.remove the cover and look for a tan with a black stripe wire,this is the wire that needs to be disconnected with the car running you should hear a difference in the idle.set timing and reconnect wire then check to make sure check engine light is off.if not start motor disconnect wire,turn off motor and reconnect wire start motor and check the light it should be off.

Hi there is a tan/black wire it should be just above the carpet on the passenger side of the truck. you will need to disconnect this and set the timing then reconnect it and clear the timing code. If this motor will not fire you may want to check and make sure the distributor is set in and timed right. the rotor on these motors dont point at the number one spot on the cap.

The tan colored wire with a black stripe is located either breaking out of the wire harness near the distributor, or under the carpet on the passenger side floor, (look up towards the top right hand corner, and you might also have to remove the kick panel to see it if it got stuffed behind the kick panel).

It is a Tan colored wire with a Black stripe, and it will usually have a unique black connector.

You will know it is the right wire because when it is dis-connected at the connector the idle and timing will change, and the check-engine light will come on.

Set the timing where you want it to be, then turn off the ignition and re-connect the wire to the electronic timing control. Re-start the vehicle and the check-engine light should go out, that is of course if it was not already on before because of another problem.

You can re-set the check-engine light by dis-connecting the battery ground for three minutes.

Look on the passenger side floorboard by the firewall. Should be a single connector. Tan wire with a black tracer. Set the timing to 0

You have to put the Ignition Control (IC) system in the bypass mode by disconnecting the "set timing" connector. This is a single wire sealed connector that has a tan with black striped lead. The location of the "set timing" connector with a Powertrain Control Module (PCM) controller is near the PCM connectors in the passenger compartment. Unplug connector (tan/black stripe) start engine set timing to 0 TDC, TURN OFF ENGINE, re-connect timing connector

Firing Order 1 - 6 - 5 - 4 - 3 - 2
Drivers side: 1 - 3 - 5
Passenger's side 2 - 4 - 6

start engine and bring to normal operating temp. unplug the base timing connector located in the distributor wiring harness tan wire with a black stripe use a timing light and set timing to 0 degrees at idle the timing marks are on the crankshaft pulley and a tab on the timing cover with numerical indications

Note: The Timing Connector breaks out of the engine wiring harness conduit adjacent to the distributer. It is a single wire sealed connector that has a tan with black stripe lead.
Note: Timing specifications are listed on the Vehicle Emissions Control Information label under the hood. Always follow the Vehicle Emissions Control Information label procedures first before using the following procedure. PROCEDURE:
Set timing under the following conditions:

• Normal operating temperature.
• Air cleaner installed.
• A/C "OFF".
• Transmission in neutral.
• Disconnect SET TIMING connector (tan/black wire) located in the harness close to the distributor. DO NOT disconnect the 4 wire connector at the distributor.
• Connect timing light and adjust as necessary by loosening hold down bolt and rotating distributor.

Base Timing, with Manual and Automatic Transmissions: 00(TDC)

• Tighten hold down and recheck the timing.
• Stop the engine and connect SET TIMING connector.
• Clear ECM trouble code by disconnecting ECM power source.

Connect a voltmeter set on ac volts to the pickup coil wires (disconnected from the module) and crank the engine.

2. The pick-up coil output should be more than 0.7v AC. If not, replace the pick up coil and distributor shaft.

3. Visually inspect the condition of the magnet on top of the distributor shaft to be in good condition. If not, replace the distributor

1. Disconnect the set timing connector or ground the Tan/Black bypass wire.

2. The check engine light should come on and code 42 should set.

3. If the engine stops stalling, disconnect the pick up coil connector at the Ignition Control Module (ICM).

4. Check acv output from the pick up coil while cranking the engine at a normal cranking speed.

5. If output is less than 700 mv replace the distributor shaft with a new one.