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What is the purpose of the vacumn air pump on the right front side of the engine in a 1991 Mercury Grand Marquis?
Wiki User
∙ 17y ago
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.
Wiki User
∙ 17y ago
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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 disconnections...bank 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.
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 the opposite to a vacumn?
mass
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
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.
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.
