An air leak might cause the car’s computer to balance out the equation by adding more fuel. This means that the engine is using more fuel to accomplish the same amount of work. Intake manifold ...

Air leaking into your car—not out of it—can be a problem. Popular Mechanics’s automotive experts outline the tools and techniques proven to smoke out even the toughest to find vacuum leaks.

Vacuum leaks can also come from a loose or cracked intake manifold. If you've recently removed the manifold, carburetor, or ...

ANSWER: Leaking intake manifold gaskets are a fairly common problem on several GM V-6 and V-8 engine types built during the past two decades. ... incoming air and fuel, ...

If the fuel is in the atmosphere, it can cause pollution, even if the vehicle's engine is off. Evaporative emission control systems (EVAP) are used in cars' fuel systems to prevent gasoline fumes from ...

Q-The intake manifold on my 1982 Lincoln was leaking. Last December, a Lincoln Mercury dealer resealed the manifold and cleaned out the carbon buildup. As I was driving home, I noticed big puffs of… ...

It was time to pull off the entire manifold and TGV assembly from the heads. ... and gasket when you do this step. Nothing is worse than finding a fuel leak after you're all done! See All 25 Photos.

When the PCM sends a signal to open the valve, the valve allows the fuel vapors to flow into the engine. When the valve is closed, the fuel vapors are trapped in the evaporative canister and held ...

Investigators have found that a ruptured fuel manifold hose on the Rolls-Royce Trent XWB-97 engine of a Cathay Pacific Airbus A350-1000 led to an in-flight engine fire that could have caused ...

Snap-On's AC 6500 vacuum leak detector monitors the sounds coming from your engine and will beep faster as the probe is moved closer to a leak. You can frequently find used detectors on eBay ...