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This is for timing a 93 suburban with a throttle body carb.
On the passengers side firewall in the engine compartment there is a cover with three
plastic nuts. Take off cover and look for a cylindrical plug about 2 1/2 " long it usually has
a tan or brown wire going to it with a dashed lined with another color. Unplug this wire,
then start truck and set timing to 0 degree TDC . Turn the truck back off after setting
timing and disconnect the positive terminal to battery. Wait about 10 to 20 seconds and
reconnect battery, now plug the cylindrical plug back in and check timing again, it should
still be at 0 degrees TDC. If not repeat process again to ensure you didn't miss a step.
This procedure resets the computer.
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∙ 14y ago
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