What causes idle speed variation on 1972 280 SE?
A drop or two of oil on the felt pad under the rotor every 5000 miles or less). If it sticks, it can snap back and forth rather than moving smoothly, causing idle speed variation. A leaking vac retard on the distributor can make trouble, too. 1972 280 SE 4.5 165, 000 – It runs!
Is there a problem with my 1972 280 SE?
1972 280 SE 4.5 165, 000 – It runs! Still sounds like too much air. Afmcorp, verify that the AAV is closing! If so, (George, sounds like you are sure that yours is okay) close the idle air screw until cold idle is no higher than 1500, and see what value it settles down to when warmed-up (~500 is okay).
Why is the idle speed of my car so high?
Step 2 – The idle air control motor (valve) is responsible for controlling the engine idle speed, if this part fails or becomes weak the engine idle speed could become erratic, additionally, this condition may or may not trigger the MIL (check engine, service engine soon light.)
Why does the Check Engine light come on when the engine is idle?
The check engine light in your vehicle is designed to turn on if the Engine Control Unit (ECU) identifies an issues with how the engine is running. Look at your dashboard; if the check engine light is on in conjunction with idle issues, it may be because the idle control valve is malfunctioning.
1972 280 SE 4.5 165, 000 – It runs! Still sounds like too much air. Afmcorp, verify that the AAV is closing! If so, (George, sounds like you are sure that yours is okay) close the idle air screw until cold idle is no higher than 1500, and see what value it settles down to when warmed-up (~500 is okay).
A drop or two of oil on the felt pad under the rotor every 5000 miles or less). If it sticks, it can snap back and forth rather than moving smoothly, causing idle speed variation. A leaking vac retard on the distributor can make trouble, too. 1972 280 SE 4.5 165, 000 – It runs!
Step 2 – The idle air control motor (valve) is responsible for controlling the engine idle speed, if this part fails or becomes weak the engine idle speed could become erratic, additionally, this condition may or may not trigger the MIL (check engine, service engine soon light.)
What’s the problem with my 1972 350 SL?
Tight exhaust valve cold become exhaust valves held open when they heat up, so you lose compression. Doesn’t take much of a leak to mess up the idle. Intake valves don’t get so hot, so they “grow” less. 1972 280 SE 4.5 165, 000 – It runs! I have the same problem with my 1971 350 SL. But I have fix the problem.