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1986 should be carburatored and it is not required. That would only apply to a fuel injected engine.
NO there is not. The timing on that engine is computer controlled and it REQUIRES an engine scanner to set the timing. A timing light will not work.
The only way to set the timing is with a OBDII engine scanner. You CANNOT use a timing light. The timing is computor controlled.
Start engine, unplug coolant sensor, set to 12 btdc
UNPLUG THE COMPUTER TIMING CONTROL, and set the ignition to ZERO with engine at idle, hook-up PCM control, YOUR DONE! Good luck, Jamison
if it is tbi you have to unplug the est, it is a single wire (tan/blk stripe) get a timing light and set the base timing at 0 degrees,then shut off the engine plug the est back in . unhook the neg batt terminal for 30 seconds to a minute , that will clear the codes, then put it back on and crank the engine , the timing should be set.
Ensure cam and crank are timed correctly. When installing distributor, make sure rotor is pointing near number one. On firewall to the left there is a plastic cover. Under cover is a tan wire w/ black stripe. Unplug this wire. Start engine ( check engine light will be on because wire is unplugged ) and set timing to 0 degrees. Shut off engine. Reconnect wire. You're good to go.
There should be a sticker on the radiator shroud that gives timing and spark gap values. All the Chevys I've done say 0 degrees btdc. Warm up the engine. Turn it off and unplug timing wire. On later models, the connector is located near the distributor (except for 1995 models; on these, it's located under the dash, below the glove box). Tan wire with a black stripe. Set timing to 0. Turn engine off. Plug timing wire back together. Reset ECM. ECM will recalibrate after driving a while.
on the passenger side of the engine by the head and the bellhousing of the transmission you will need a 13 or 14 mm socket to remove and unplug the wire over by the distributor
If the engine is EFI you must unplug the 4 wire plug behind the distributor before starting. Then rotate the distributor while using a timing light to the correct position. If the engine is NON EFI then you must unplug the vaccum line from the distributor and adjust the same way. You should plug the line off to avoid a high idle situation as well..
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.
First unplug brown wire to computer , set timing at o degrees, turn off engine, disconnect bat, wait 10 to 15 seconds , hook computer back up , connect bat cable back , start the engine and the computer will set the correct timing.