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It is not a vacuum pump but it is an air pump. It makes the exhaust cleaner. This pump robs horsepower from the engine. More gasoline must be used to compensate for the loss of horsepower. More hydrocarbons are produced from more gasoline usage. The air pump blows oxygen rich air into the unburned hydrocarbon mixture so that we can make a measurement at the tail pipe to prove that we are not damaging the environment. It is against the law to tamper with this ingenious system. It is kind of like cutting down trees to make paper on which to write laws about cutting down trees to make paper... The catylitic converter(s) get much more efficient when clean air is pumped into the exhaust. Yes it does cause us to consume more fuel for the same unit of work. However, the overall (measured) emissions for the same unit of work is actually lower than the same system without the pump even though you have burned more fuel.

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โˆ™ 2006-12-27 15:44:01
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Q: What is the purpose of the vacumn air pump on the right front side of the engine in a 1991 Mercury Grand Marquis?
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Related questions

Where is the vacumn advance for a 95 4x4 tk-350 engine?

That engine does not have a vacuum advance.

What could cause a 1998 Jeep Grand Cherokee air conditioner and heater to stop blowing when you accelerate?

When you accelerate it probably does not quit blowing but rather blows out the defroster vent. This would indicate a vacumn leak or possibly a bad vacumn check valve. The check valve is located in the vacumn line that goes through the firewall somewhere between the firewall and where it connects to the engine. Check the vacumn with a vacumn guage (pump) in line going into the dash for vacumn leak. Hope this helps. Keith

What causes 1998 Mercedes C230 with slow acceleration and hesitation?

check vacumn tube lines for cracks or of vacumn lines are back of engine, right side, by computer modules.

Would vacumn leak in fuel line cause check engine light to be on?

Usually, but not always.

Whats the problem when 1987 corvette gears arent shifting properly way too many RPM's Cruise control wont accelerate Is this a related problem?

Vacumn modulator could be at fault. In older cars both the transmission and the cruise control rely on engine vacumn to know what the engine is doing, if the vacumn strength is not properly relayed to these components then odd behiavior will result because the tranny and cruise control don't know what the engine is doing.

What is absolute vacumn in a car brake system?

That means that the vacuum hose MUST be hooked up to the engine on a place that there is vacuum at all times when engine is idleing are speeded up.

What is the opposite to a vacumn?


Where does the PVC valve go on a 97 Mercury Mystique?

Most PVC valves go in the valve cover of the engine, either in left or right valve cover with vacumn line attached,just pulls out and pushes in for install,usually if pulled out and can shake and rattles its good, if carboned up and does not rattle its bad.

What is a Vacumn truck?

A truck that can do housework

need a cordless vacumn that does not get retail store tags caught in it. seems the charge stops after 4 months of using the tv brand cordless vacumn. Need a good rated vacumn thanks?

Eureka and Dirt Devil have the highest customer ratings.

Where is the PVC filter located on a Chevrolet aveo 2004?

top of engine cover back side all the way to your left it screws in and hooks to a vacumn line

How a vacumn toilet works?

Terribly as they suck

In your 1997 mustang the air is blowing through the defrost Why isn't it blowing through vents?

this one is easy your switch the controls the vents is not working there is a flap the closes the defrost vents so that it goes through the other vents or there is a vacumn line that is controlled by the switch, and its leaking. The vacumn line is usually on the engine side of the firewall. It is a very small plastic tube comming out of the middle of the firewall at the top and it connects to a junction with other vacumn lines. See if any of them are disconnected.

Service engine soon light blinking vehicle miss while driving?

If the check engine light is blinking that indicates that the catalytic converter will possibly be damaged if you ignore the problem and continue driving the vehicle. i had a car in the shop here last week with that problem and it turned out to be a cracked vacumn hose. I lifted the hood and could hear the hissing sound from the vacumn leak . The crack was in the 90 degree bent hose connected to the PCV valve. This was a GM vehicle with the 3400 engine.

What a is atmospheric over flow bottle in a car?

It is a container on a car used to store excess vacumn pressure that may be needed by the engine or ac systems to make starting easier

Why AC won't blow out of dash vents just defrost vents in a 1996 buick regal?

on your car it is a defalt mode for air to blow out defrost when there is no vacumn from the engine so you should look for a broken vacum line or see if it has come unplugged on the engine.

Why does my 1999 Ford Expedition idle rough and stall when engine warms up. Runs fine when cold.?

The most likely cause is a dilution of the fuel/ air mixture caused by a vacumn leak. check for a hissing sound near the top center of the engine.

What engine will fit a 1986 Honda CRX?

d16a1 from a 86,87 integra as long as it has vacumn advance = plug and play you will need axles and hubs from the integ that is the easiest or if you have alot of money anything will fit

1994 Ford ThunderBird LX and It had a vacumn hose problem I replaced that but there is still a strong gas smell coming from the engine and or the exhaust. What Could it Be?

clean your maf(mass air flow sensor)

How do you clear up dust mite bites?

Use a vacumn

What does an electronic spark module do?

an electronic spark module basically takes the place of set of advance weights and vacumn advance. it reads input from different sensors and engine conditions and either pull time or advances it for load, speed, throttle position etc... an electronic spark module basically takes the place of set of advance weights and vacumn advance. it reads input from different sensors and engine conditions and either pull time or advances it for load, speed, throttle position etc...

1990 Corolla 4 Door With 94k - Do I need new oil pump - Oil light comes on when hard braking - Mechanic should fix?

As far as I know, the oil pump and the brake system have nothing to do with each other. However, the brake system uses enging vacumn to assist braking. When you push down hard on the brake pedal, it causes the engine vacumn to diminish. This may result in the engine not getting enought fuel, because vacumn is involved in determining fuel mixture. If the oil light goes out within a second or two of releasing the brakes, I wouldn't worry about it. If it stays on for longer than that, it could mean that the engine needs to be serviced. If you have not had the spark plugs changed since the car was new, it is time to change them. Also, the air cleaner element probably needs to be changed.

Does radiation happen in solids liquids or gases?

Radiation can occur in a vacumn.

How do you remove engine from 1988 Toyota tercel carburated with standard transmission?

The path of least resistance is to pull the cross members under the car, pull the mounts disconnect : fuel lines, vacumn lines, linkage etc. and drop the engine and transmission out the bottom as a unit. Then split the engine and the tranny. GOOD LUCK

What household item was invented by Hurbett Cecil Booth in 1901?

Vacumn cleaner