NJFBOA - Home of New Jersey's Camaros and Firebirds - View Single Post - HELP PLEASE! Timing jumps after being set with timing light! Causing Overheating!

91RS84TA · 08-11-2009, 10:29 AM

Okay so I did a 305 to 350 Swap (Rebuild from 73' chevelle) on my 1991 RS, and were hopefully wraping up the swap. PROBLEM!!! My mechanic keeps setting the proper timing to the car but he says it keeps jumping after being set on its own. We did new plugs, correct firing order with new wires (Accell), and lined up everything with first spark plug and everything. He sets it using the timing light and then it will jump from i believe he said 12 degrees to 20 degrees. Don't quote me on that because im not sure of the exact numbers. Installed a new fan and thermostat yesterday, still climbs to 220 degrees. The coolant is flowing but the reservoir looked like a guyser after driving it for 5 minutes very easy. Maybe my distributor from the 305? Or my module? Maybe both? Help PLease?

08-11-2009, 10:29 AM	#1
91RS84TA Join Date: Dec 2008 Location: Union Twp. & Jersey City Posts: 19 iTrader: (0)	HELP PLEASE! Timing jumps after being set with timing light! Causing Overheating! Okay so I did a 305 to 350 Swap (Rebuild from 73' chevelle) on my 1991 RS, and were hopefully wraping up the swap. PROBLEM!!! My mechanic keeps setting the proper timing to the car but he says it keeps jumping after being set on its own. We did new plugs, correct firing order with new wires (Accell), and lined up everything with first spark plug and everything. He sets it using the timing light and then it will jump from i believe he said 12 degrees to 20 degrees. Don't quote me on that because im not sure of the exact numbers. Installed a new fan and thermostat yesterday, still climbs to 220 degrees. The coolant is flowing but the reservoir looked like a guyser after driving it for 5 minutes very easy. Maybe my distributor from the 305? Or my module? Maybe both? Help PLease? __________________ NJFBODYNJ