check your vacume lines by spraying them down with carburetor cleaner. if the engine revs when you spray you found the leak. also check your air flow meter it could just be dirty.
Yes - You have a vacuum leak
when a dozer is idling its rpm are at 90,000 to 95,000 Could be dirt in the carb's idle circuit. Maybe a vacuum leak.
NO not that engine.
check the wires, if they are crossed up you get bad ilding. my aurora was idling around 1500 rpm's, but after having all the spark plugs and boots replaced it went back to around 600...see if that helps
1500 rpm.
RPM stands for Revolutions-Per-Minute, and is counted at the crankshaft. At 3000 RPM the engine is spinning twice as fast as at 1500 RPM.
800 RPM
You can adjust the idle air control valve on a 1992 1500 truck while it is just idling. This is done if the truck is idling too fast or too slow. It will help the truck run better.
If you have average mileage on it, you should go get it checked. That is too low for an idle. The vibration is probly from the low idle.
Mine is between 500 and 600 rpm's after the engine is warmed up.
Normal operating temperature 650-750 RPM it should be between 0.5 and 1
if it drives normal except when you let off the gas the rpm jumps then it is a map sensor