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Mike S.
Mike S., Chevy Mechanic
Category: Chevy
Satisfied Customers: 7500
Experience:  ASE Certified Master Technician
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How do you set the timing in a 2000 chevy tahoe z71 5.7 v8

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How do you set the timing in a 2000 chevy tahoe z71 5.7 v8
Ignition timing is preset and cannot be adjusted. Ignition timing is controlled by the Powertrain Control Module (PCM). On V8 engines the distributor can be rotated for proper alignment of the rotor to the cap. The engine base timing is not adjustable by rotating the distributor.
If you have never had the distributor out then there should be no need to align the rotor to the cap, but if you want you could double-check it.
The rotor will point to the No. 1 terminal of the distributor cap when the # XXXXX is at tdc on the compression stroke and the timing mark at 0.
Customer: replied 7 years ago.
when i hook it up to a computer for a diognastic it is reading a constant 28 deg. no fluctuation what so ever when the engine is revd up or in gear, basically the engine fluctuates between 500 and 700 rpm while i am in gear at a stop light but it runs strong with no problems during regular driving, i changed the iac, tps, cam shft snsr and crank sft sensor, this seems like it would be the prob since the dio says the timing is off, wouldnt you agree or do you think it is something else?
Is there a code associated with that timing is off?
Customer: replied 7 years ago.
yes, P1345 manufacturer ingnition correlation , misfire. it relates in the haynes manual as crankshaft/camshaft sensor

For reinstalling the distributor, click here.

For testing that code, click here.

Customer: replied 7 years ago.

thank you, XXXXX XXXXX have 1 more question, is there a nut under the rotor that i can loosen after i bring the engine to tdc @ 0deg. to reset the timing?

The bolt is to hold the clamp on the distributor housing.

If when you get the # XXXXX up on tdc on compression stroke and the rotor does not face the #1 mark on the cap, loosen the hold down bolt and turn the distributor untill it does align.

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