The firing order on most GM V8 engines is 1-8-6-3-5-4-7-2.
On the distributor cap, if the distributor shaft and timing chain have been properly installed, the number one terminal is closest to the carburetor or throttle body.
CORRECTION!!! 18436572 is the correct firing order
To set the timing on a 1991 Chevy Caprice, first ensure the engine is at operating temperature. Next, locate the timing mark on the harmonic balancer and the timing tab on the engine. Use a timing light to check the current timing by connecting it to the number one spark plug wire. Adjust the timing by loosening the distributor hold-down bolt and rotating the distributor until the timing light indicates the correct specification, usually around 8 degrees BTDC for most models, then re-tighten the distributor bolt.
you dont
Sounds like your timing chain might have jumped a notch. Timing is set by rotating the distributor. There is a nut underneath the distributor that locks it down. Timing mark is on the harmonic balancer, sorry I don't have the setting handy. I would start by checking the timing with a timing light. VBdenny
It does not have a timing belt. The cam is chaindriven.
I think is 8 degree BTDC ...........
you turn the distributor and use a timing light
No need to if the distributor was not moved.
To add, this is a 5.7 v8 engine.
10w 30
0 degrees in drive bypass disconnected
It's 4 degree BTDC ... A computer controlled distributor on SBC engines is set at 0 degrees. There is a special procedure for setting the timing on computer controlled distributors. Consult the Chilton or Haynes manuals for specifics.
turn the distributor