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It can. The leaking gas cap is preventing the fuel tank to establish the proper positive pressure levels that the emission systems rely upon to operate correctly. A leaking gas cap will also cause the vehicle to fail its emissions tests. The leaking cap is also putting excess vapors into the environment. Replace that cap ... they are not that expensive.
What else can I help you with?
What is the typical cause of a vacuum leak in a 2004 Chevrolet Impala?
The most typical cause of a vacuum leak is a cracked vacuum hose. The hoses get brittle with age, and cracks are common.
What causes high fuel consumption on a petrol fuel injection?
Most common cause of unusually high fuel comsumption is a fuel leak. Other possiblities include leaking injectors, faulty O2 sensor, vacuum leak or incorrectly adujsted intake valve.
What can cause oil leaking from behind your exhaust manifold?
Valve cover gasket
What would cause a rough idle when stopped on a 99 Toyotal Rav4?
I can't speak directly for a Toyota, but if you have a carberated system then you could be having problems with a leaking vacume hose or something in your EGR valve.
Every time my heating system in my house comes on I hear a dripping sound in the ceiling. What could be the cause?
If you have a hot water system the plumbing is expanding and retracting as the pipes heat up and cool down. If it was leaking water it would have shown up by now.
What will the results be if a fitting is leaking and the system is evacuated to a deep vacuum?
If a fitting is leaking and the system is evacuated to a deep vacuum, the vacuum pump will struggle to reach and maintain the desired vacuum level, and the system will not hold the vacuum pressure. This can lead to moisture and air infiltration into the system, which can cause performance issues and potentially damage system components. It is important to fix the leak before evacuating the system to ensure proper operation.
Why would the ac change from dash vents to the defrost vents when accelerating?
Because you have a vacuum leak in the system or your vacuum canister is leaking. When you accelerate the vacuum from the engine will drop. That will cause your system to loose vacuum and the floor/defrost door will go to its neutral position. To keep the vacuum up you have a canister that will hold vacuum. It must be air tight.
What does code p1443 mean?
P1443 Evaporative Emission Control System - Vacuum System - Purge Control Solenoid or Purge Control Valve fault Loose or defective gas cap will cause this code.
Will bad oxygen sensor cause rough idle?
Not likely but possible. I would suspect a leaking vacuum hose.
Can a leaking intake gasket cause coolant to flow into the exhaust system?
No.
What is the cause of air conditioning blower switching to defrost instead of dash when accelerating up hill on a 1998 dodge b1500 van Already tested for vacuum leak none found?
Low vacuum, an external leak, or a leaking vaccum check valve are the only causes.Low vacuum, an external leak, or a leaking vaccum check valve are the only causes.
Only have 14 lbs of vacumn at idle 350 Chevy why?
more than likely you have a leaking vacuum line. some of those lines are really thin, and the smallest puncture will cause a loss of vacuum.
What would cause whistling or hissing noise from 2001 Rav4 at idle?
vacuum or air intake hose leaking or disconnected or loose...? good luck:)
Is the air valve leaking in your system causing any issues?
Yes, a leaking air valve in your system can cause issues such as reduced efficiency, loss of pressure, and potential damage to other components.
1996 Honda civic will start but won't idle enough to keep it running?
A common cause for a stalling 1996 Honda Civic is a vacuum leak. Check the vacuum diagram for the vehicle and is if there are any leaking air lines.
Will a leaking heater core cause your car to overheat?
A leaking heater core will cause the engine to overheat because the coolant is leaking out.
How do you cure backfire in an mg midget?
you must have air leaking into the exhaust system that will cause backfire when you decelerate raw gas goes into the system
