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1. Connect the distributor's B+ (battery) terminal to a switched 12-volt source, such as the ignition switch.
2. Connect the distributor's tach terminal to the tachometer signal wire, if you have a tachometer.
3. Connect the distributor's ground wire to a good engine ground.
4. Connect the distributor's #1 spark plug wire to the #1 spark plug on the engine. The #1 spark plug is usually located on the driver's side front cylinder.
5. Connect the remaining spark plug wires in firing order sequence to the distributor cap terminals. The firing order for a Buick 455 engine is 1-8-4-3-6-5-7-2.
The green wire from the tach goes to the negative side of the coil or if its an HEI distributor it will connect to the left of the hot wire going. to the distributor.
ok looking from the driver's side of vehicle at your distributor. There is a power wire (which on most accel or msd distributors) on the right in the first row the wire connection on the left is for a tachometer the row behind it can either have 2 or 3 wires most of the time 1 is usually black and it grounds the ignition coil module inside the cap the other wire/s tranfers power from power connection to coil. A hei or high energy ignition system uses the coil module to amplify the voltage from the standard 30k volts to about 45-50k volts
Hi, I have pasted the procedure below. Your spec is 0 degrees (right at TDC).
CHECKING AND ADJUSTMENT
HEI Systems
Start the engine and allow it to reach operating temperature. Stop the engine and connect the timing light to the No. 1 (left front) spark plug wire, at the plug or at the distributor cap. You can also use the No. 6 wire, if it is more convenient. Numbering is illustrated in this section.
Do not pierce the plug wire insulation with HEI; it will cause a miss. The best method is an inductive pickup timing light.
Clean off the timing marks and mark the pulley or damper notch and timing scale with white chalk.
Disconnect and plug the vacuum line at the distributor on models with a carburetor. This is done to prevent any distributor vacuum advance. On fuel injected models, disengage the timing connector which comes out of the harness conduit next to the distributor, this will put the system in the bypass mode. Check the underhood emission sticker for any other hoses or wires which may need to be disconnected.
Start the engine and adjust the idle speed to that specified on the Underhood Emissions label. With automatic transmission, set the specified idle speed in Park. It will be too high, since it is normally (in most cases) adjusted in Drive. You can disconnect the idle solenoid, if any, to get the speed down. Otherwise, adjust the idle speed screw.
The tachometer connects to the TACH terminal on the distributor and to a ground on models with a carburetor. On models with fuel injection, the tachometer connects to the TACH terminal on the ignition coil. Some tachometers must connect to the TACH terminal and to the positive battery terminal. Some tachometers won't work with HEI.
WARNING
Never ground the HEI TACH terminal; serious system damage will result.
Aim the timing light at the pointer marks. Be careful not to touch the fan, because it may appear to be standing still. If the pulley or damper notch isn't aligned with the proper timing mark (see the Underhood Emissions label), the timing will have to be adjusted.
TDC or Top Dead Center corresponds to 0°B, or BTDC, or Before Top Dead Center may be shown as BEFORE. A, or ATDC, or After Top Dead Center may be shown as AFTER.
Loosen the distributor base clamp locknut. You can buy trick wrenches which make this task a lot easier.
Turn the distributor slowly to adjust the timing, holding it by the body and not the cap. Turn the distributor in the direction of rotor rotation to ******, and against the direction of rotation to advance.
Tighten the locknut. Check the timing again, in case the distributor moved slightly as you tightened it.
Reinstall the distributor vacuum line or the timing connector. Correct the idle speed.
tach hook up for chevy with hei distribitor is 1)white wire ; 12volt source 2)red wire -12 volt ignition switch (+) 3)black wire -battery ground (-) green wire ; to tach terminal on dist. / if it not hei with points just put green wire to neg. (-) side of coil
if you have an hei distibutor you need one 12 volt wire when cranking and running to the distributor. that is all that is need to hook to the distributor to run.the distributor will have a plug from the module that hooks into the cap/coil. you also have a tach hookup on the cap.
Hey , just take the positive wire from the coil you are removing and feed it to the + terminal on the HEI dist. cap.the other terminal under there is for your tachometer. If you are mounting a master kill switch in the bumper for drag racing- attatch the kill wire to the tach terminal also.
Thats it you just plug the three wire pigtail from the dist. base(pickup) to the cap and you are off.
Remember firing order is 18436572 in a clockwise direction. to find #1 remove #1 plug and have someone"bump" the engine over while holding your finger over the hole-carefull. then line up the slotted mark on the crank pulley with the big notch on the timing indicator. Good luck
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