How to connect fuel and air pipes to right place

Check for vacuum leak, hoses, tubes, gaskets and exhaust leak upstream from the oxygen sensor, most likely a vacuum leak when missing.

There are alot of factors that could prevent the engine from revving over 1500RPM. Some sensors like the crank angle or cam angle have to be connected in order for the engine to even start, other wiring loom plugs like the turbo controller need to be connected or the car goes into limp mode and it won't rev past a certain point.

Then there are the automatic throttle controller area wiring loom type plugs near the inter cooler, sometimes people forget to put them all back and the engine won't rev high. Making sure the vacuum pipes in this area are all connected properly, one unplugged pipe, no vacuum, the injector pump relies on the vacuum system and if it doesn't work then not enough fuel delivery, engine can't rev high. Also if the fuel rail is leaking or if the fuel filter is clogged then engine won't rev high.

Do you have black smoke or what looks like soot coming out of the tail pipe. The check engine light monitors fuel pressure through the computer and pressure regulator. It will come on if the pump pressure is too high or too low. If the pressure regulator is faulty it could cause excessive fuel consumption,

P0152 P0152 - O2 Sensor Circuit High Voltage Bank 2 Sensor 1Possible causes - Faulty Front Heated Oxygen Sensor Bank 2
- Intake air leaks may be faulty
- Exhaust gas leaks
- Front Heated Oxygen Sensor Bank 2 harness is open or shorted
- Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
eplacing the Front Heated Oxygen Sensor Bank 2 usually takes care of the problem
Symptoms- Engine Light ON (or Service Engine Soon Warning Light)
- High Fuel Consumption
- Excessive Smoke from Exhaust P0152 Description The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

look under and around the iar filter /engine cover for a sensor with a vacumn pipe attached ,think thats the renault but i just cannot remember but it causes this fault ,failing which check the fuel filter for sucking in air by pressuring the system with a electric pump and looking for leaks connect to pipe from fuel tank and outlet to where the pipe connects and then run pump to look for leaks ,the fuel filter is at the front of the engine ,then if no leaks check the reading on the mass air flow sensor ,a OBDII cheap code reader will do this by checking all the pids it will show timing and air temp ect and this vehicle can be read with one depending on year

P2240 HONDA - Front Air/Fuel Ratio Sensor Bank 2 Sensor 1 IP Line High Voltage.
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- High Fuel Consumption
- Excessive Smoke from Exhaust Possible causes - Air/Fuel Ratio Sensor Bank 2 harness is open or shorted
- Air/Fuel Ratio Sensor Bank 2 circuit poor electrical connection
- Faulty Air/Fuel Ratio Sensor Bank 2
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

Possible faults:-

Coolant sensor - engine is signaled as being 'cold' all the time, not just at start up, causing ECU to set longer injection cycle

? Low coolant level can prevent sensor being able to detect coolant temperature

? Faulty 'open' thermostat allows coolant to circulate without regulation and perhaps prevents the engine from achieving normal running temperatures.

To check put a voltmeter across the coolant sensor connections and there should be a difference between the engine being cold and hot. If not the sensor is faulty. Check sensor connections and wiring.

FPR - broken diaphragm allows fuel to enter the vacuum line and then into the inlet manifold. Additional source of fuel makes the fuel air mix richer causing a faster and lumpy idle. To check the FPR have the engine at idle and pull the vacuum line off it. If the FPR is healthy the engine will pick up in revs for a few seconds and then settle back to a very lumpy idle. If fuel dribbles out of the vacuum line then replace the FPR.

Vacuum leak - 'high oxygen' signal from O2 sensor causes ECU to set longer injection cycle. Check all hoses and connections with the inlet manifold. Check the inlet manifold to block junction and around injector ports. A small squirt of WD40 on suspect areas will cause the engine to momentarily pick up in revs if there is a leak.

O2 sensor - 'high oxygen' sensor error causes ECU to set longer fuel injection cycle. A voltmeter across the sensor pins should show above 200mV (note this is AC voltage). Check again when hot as the sensor can fail progressively and lose voltage as it gets hotter.

MAF - 'over reads' in error the amount of air entering causing ECU to set longer fuel injection cycle. Located in the collar next to the air filter box on the air ducting. Make sure the MAF is clean, do not touch, just spray it with electrical cleaner when it is off the car. The MAF has three wires (0volts; 5 volts supply; signal). Check that the signal voltage varies according to engine speed (air being sucked in). If not change it

IAT - 'under reads' in error the temperature of incoming air causing ECU to set longer fuel injection cycle. often co-located with the MAF but can be nearer the throttle on the air ducting. Has two wires. Unplug the IAT from the ducting and check that its resistance changes when you blow on it. Give it clean with electrical cleaner spray. If not change it

Hope the above check list helps.

Hi Warren,,
These cars are fitted with a Delphi common rail system that is known for various faults including yours, you need to have a sealed rail test done on the injectors as they are probably leaking off to much causing low pressure in the common rail,when the car is warm,they also suffer with injector code loss ,no reason they get confused this normally gives poor performance and high fuel consumption ,if the injectors are fine check the system for air leaks in the fuel supply pipes and check the leak off pipes for leaks,even the smallest leak can let air in,if the engine light has come on get the codes read ,
Darren DCS

Suspect worn needle valve & seat assembly !---Quick test , with care>Whilst riding on open road &holding throttle at set position, switch off fuel supply & note IF engine speeds up, IMMEDIATELY Back off throttle, watch rear vision mirrors for traffic behind & switch on fuel supply!---If that small test indicates Carburettor area of further examination, UNLESS YOU ARE QUALIFIED the needle valves need to be examined byTrained eye!-(Especially wear on sides of needle valve & ALSO, check "floats"Stay Upright Des

Sounds like the choke is sticking on, that would also explain the heavy fuel consumption