What is the timing set for a 4.3 motor


Old 11-30-07, 05:42 PM
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Join Date: Nov 2007
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Question What is the timing set for a 4.3 motor

Hi can anyone tell me what the timing should be set at for 4.3 motor in a 1988 chevy truck .
I looked in my book but it did not tell me ' it said to look on the truck . And I can't find it there .

PS: And what is the idle RPM suppose to be set at.


Last edited by major41; 11-30-07 at 06:22 PM.
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Old 12-01-07, 05:08 AM
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Looks like 700 on the idle, not adjustable if it's fuel injected. Timing 4 deg BTDC for manual trans, automatic - "see underhood info". Hmmm. Maybe someone knows; in the meantime you're probably safe using the 4 BTDC.

On carbureted engines you would need to disconnect the vacuum advance line to kill the advance on the timing. On injected models there should be a small connector visible near the distributor that must be disconnected to accomplish the same thing prior to setting timing.
Old 12-01-07, 08:17 PM
Join Date: Jan 2007
Location: North Central Indiana
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Set timming on 4.3

I believe fuel injection started in 87 so your idle speed would be computer controlled. RW

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