Federal Model
- With engine at idle speed, check pipe to EGR valve. Pipe should not warm up. Disconnect rod for EGR valve and push lever on EGR valve to full throttle position. Check pipe to EGR valve. Pipe should not warm up.
- If test is not okay, shorten rod turning hex until idle speeds drops suddenly (valve opens). On manual transmission model, turn hex 1 1/16 turns. On automatic transmission model, turn hex 5/6 of a turn.