What causes poor idle and stalling on a Silverado?

Carbon & varnish build up will cause poor idle. If after a cleanup you still have the problem have a tech check with a scanner. Engine hot in “D” IAC counts should be 15-30. Beyond the cleaning above, check for an air leak from either a vacuum hose off or a loose clamp, etc. between the airfilter box and the throttlebody.

Why does my Silverado stall at red lights?

Always have the A/c on as I’m in Florida. At speeds of 15 MPH up to highway speeds, all is good. A/C blows cold and engine runs fine. Stalling 10 times in 30 minutes, at red lights, etc isn’t normal though.

Is there an idle air control on a Silverado?

Your truck doesn’t have an Idle Air Control since it has an electronically controlled, drive-by-wire throttle. One can get MAF cleaner at the auto parts store. Spray the tiny filament wires inside the MAF with the cleaner.

Where is the idle control valve on a Chevy Vortec?

The idle control valve sits on the throttle body and is responsible for adjusting the amount of air that enters the engine at idle, ultimately controlling engine idle speeds. At idle, the valve blocks a small amount of air from entering the engine, keeping idle RPM’s low.

Why does my Chevy 6.0 stall out at low idle?

A poor idle sometimes happens after working under the hood as guys have a tendency to lean on the air intake piping pushing it down slightly. Which causes air to leak in around the clamps.

Is the Silverado 6.0 running rough, stalling?

SilveradoSierra.com • 6.0 running rough, stalling. : Vortec 6000 6.0L V8 6.0 running rough, stalling. The truck ran perfect yesterday (towing a trailer all around town, about 100 miles). Today, when I went to turn the key, the radio came on, and then it died- didn’t even turn over.

What should the idle speed be on a Silverado?

When I have my AC on, which is all summer here in Phoenix, it works great when the idle is just above 500 RPM, but if it dips below 500 the AC turns to warm air (not good for the attitude when in the summer heat of Phoenix).

Can a bad idle control valve cause stalling?

3. Engine stalling The idle control valve, also commonly referred to as the idle air control valve, is an engine management component that is found in one form or another on the majority of road going vehicles.