What cause it to use too much fuel - 1997 Oldsmobile Regency

There could be several reasons why your Daihatsu Terios is consuming too much fuel. Here are some possible causes and remedies.Driving habits: Your driving habits could be the cause of the high fuel consumption. Aggressive driving, speeding, and rapid acceleration can all increase fuel consumption. To remedy this, try driving more conservatively and avoid sudden stops and starts. Tire pressure: Low tire pressure can increase fuel consumption. Make sure your tires are properly inflated to the recommended pressure levels. Air filter: A dirty air filter can cause the engine to work harder and burn more fuel. Replace your air filter regularly to keep it clean and functioning properly. Fuel injectors: Dirty or clogged fuel injectors can cause the engine to burn more fuel. Have your fuel injectors cleaned or replaced if necessary. Oxygen sensor: A malfunctioning oxygen sensor can cause the engine to burn more fuel than necessary. Have your oxygen sensor checked and replaced if needed. Spark plugs: Worn or dirty spark plugs can cause the engine to run inefficiently and burn more fuel. Replace your spark plugs regularly to keep them functioning properly. It's important to have your vehicle inspected by a qualified mechanic to determine the root cause of the high fuel consumption. By addressing the underlying issue, you can improve your vehicle's fuel efficiency and save money on gas in the long run.

It sounds like there is an issue with the fuel system in your Kangoo 1.4 2005 panelvan, specifically with the amount of fuel being fed to the fuel rail. Here are a few potential causes for the issue and steps you can try to troubleshoot:

1. Fuel Pressure Regulator: The fuel pressure regulator is responsible for controlling the pressure of the fuel being delivered to the fuel rail. If the fuel pressure regulator is malfunctioning, it could be causing too much fuel to be delivered to the fuel rail.
2. Fuel Return Valve: The fuel return valve is responsible for controlling the flow of fuel from the fuel rail back to the tank. If the fuel return valve is malfunctioning, it could be causing too much fuel to be delivered to the fuel rail.
3. Fuel Pump: The fuel pump is responsible for delivering fuel from the tank to the fuel rail. If the fuel pump is malfunctioning, it could be causing too much fuel to be delivered to the fuel rail.
4. Fuel Injectors: The fuel injectors are responsible for injecting fuel into the engine. If the fuel injectors are clogged or malfunctioning, they can cause too much fuel to be delivered to the fuel rail.
5. Fuel Filter: The fuel filter is responsible for removing impurities from the fuel before it reaches the engine. If the fuel filter is clogged, it can restrict the flow of fuel and cause too much fuel to be delivered to the fuel rail.
6. Engine Control Module: The engine control module is responsible for controlling the fuel system. If the engine control module is malfunctioning, it could be causing too much fuel to be delivered to the fuel rail.

It's recommended that you take your vehicle to a qualified mechanic to diagnose the problem and repair it. Some of the above-mentioned components may need to be checked and replaced, and they may require special tools and knowledge of the vehicle

Vapor lock can be caused by many different things, all coming down to the same root cause: too much heat in the fuel feed lines.

Low fuel pressure can cause the amount of heat needed to vapor lock to be lower than normal, so checking fuel pressure is important. Fuel pump going out feels a lot like vapor lock.

Engine overheat can also cause vapor lock. Clogged fuel filter can cause vapor lock. The fuel line should be routed away from the exhaust system.

The most common cause for this condition is a leaking purge valve located under the hood. This purge valve goes bad all of the time causing a few different conditions. It could go bad causing a hard start after filling up with fuel or it could be leaking fuel vapors causing this smell inside the vehicle you are describing.

Also, be sure to check the fuel-rail dampener, around the fuel pressure line, fuel injectors and o rings VERY carefully for any fuel leaking as this can cause a gas smell inside the vehicle.

I hope this helps and have a great weekend!

What Causes Fuel Pumps to Fail - AGCO Automotive ...

www.agcoauto.com/content/news/p2_articleid/195
The pump is the heart of the fuel pump module and does the work of moving ... Abad fuel pump could cause any or all of the symptoms below: ... This is unfortunate as fuel quality is a real problem and a clogged filter may mean a new fuel pump. ... Fuel with ethanol will go through phase separation if it remains too long in ...

Yes this is correct, you can get important information from the colour of smoke from the exhaust:

Blue/Gray Smoke: Blue/gray exhaust smoke is an indication of oil burning in the combustion chamber. These are possible symptoms and causes:
Valve Seals: Leaking valve seals will cause blue/gray smoke at startup because oil leaks past the seals into the cylinder after the engine shuts down.
Valve Guides: Excessive clearance between the valve stem and the valve guide allows oil to leak past the gap into the cylinder.
Piston Rings: Worn or damaged piston rings will cause blow-by resulting in blue/gray smoke.
Worn Cylinder Walls: Worn cylinder walls cause blow-by resulting in blue/gray smoke.
PCV System: A stuck closed PCV valve will cause excessive crankcase pressure resulting in blue/gray smoke.
Black Smoke: Black exhaust smoke is an indication of a rich fuel condition. These are possible causes:
Fuel Injectors: A leaking or dripping fuel injector will cause a rich fuel condition.
Fuel Pressure Regulator: A stuck closed fuel pressure regulator will cause a rich fuel condition.
Fuel Return: A restricted fuel return line will cause a rich fuel condition.
White/Gray Smoke: White exhaust smoke is an indication that coolant is burning in the combustion chamber. These are possible causes:
Cylinder Head: A crack in the cylinder head (around the coolant jacket) will cause coolant to enter the combustion chamber.
Engine Block: A crack in the deck of an engine block near the coolant jacket will cause coolant to enter the combustion chamber.
Head Gasket: A damaged or blown head gasket will cause coolant to enter the combustion chamber resulting in white/gray smoke coming from the tailpipe.

FUEL SENDING UNIT IN THE FUEL TANK FAULTY.THE FLOAT ARM ATTACH TO SENDING UNIT.THE FUEL SENDING IS A RHEOSTAT WITH ELECTRICAL CURRENT FLOWING TO IT.YOU HAVE A COIL OF RESISTANCE WIRE IN RHEOSTAT.WHEN FLOAT+ ARM RISE WHEN PUMPING MORE FUEL IN TANK THIS CAUSE MORE CURRENT FLOW THROUGH COIL FROM RHEOSTAT TO FUEL GAUGE WHICH CAUSE FUEL GAUGE MOVE TO FULL MARK.WHEN FUEL LEVEL DROP THE FLOAT + ARM DROP CAUSE LOW CURRENT THROUGH RHEOSTAT COIL WIRE IN WHICH CAUSE FUEL GAUGE NEEDLE TO DROP SHOWING LOW FUEL LEVEL IN THE FUEL TANK.

Sits inside the throttle body, you would have to open to install regulator. Also check your fuel filter make sure it's not clog, fuel filter is under truck on fram rail, while your there do a fuel pressure test, with a fuel pressure tester, should have 13psi.

A bad fuel pump causes low fuel pressure.

Consider replacing it. It is located in the fuel tank beneath the back seat.

Good luck.