Engine photo if the filter is hasn't nicely been connected to air pipes will the perfom well

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

Honest, there are over 3,000 reasons that it could be, but one thing about engines hasn't changed. They need FUEL, AIR and SPARK. Check to see that it has all three (like pick a piston easy to get at (if you have the tools, I 'assume' too much quite often) and see if it is getting "fire", if so is there fuel pressure? ... (as for "air" just make sure nothing has taken up residence in the air intake filter or pipes ...lol).

mass air flow sensor in the air intake pipe

It was not a surely OCV problem.. Can u plz first check the basic components of the system like petrol or diesel filter and pump perfomance nd air filter. If you are satisified plz reply me.

usually caused by busted diaphram in fuel pressure regulator allowing fuel to be drawn thru regulator directly to intake manifold. Pull vacuum line off regulator, plug line with golf tee, start car and watch to see if gas comes out of regulator. If yes, turn off car, replace regulator. The regulator sits near the fuel rail on the top of the engine as shown below. I will paste replacement instructions below from autozone.com in case you need to replace the regulator. Please let me know if you have any questions.

Removal & Installation

4.2L Engine

1. Relieve the fuel system pressure.
2. Remove the air cleaner outlet resonator.
3. Disconnect the engine wiring harness from the retaining clips at the front of the engine.
4. Disconnect the fuel pressure regulator vacuum line.
5. Clean any dirt from the fuel pressure regulator and the surrounding area.
6. Disconnect the fuel return pipe.
7. Remove the fuel return pipe retainer.
8. Remove the fuel pressure regulator retainer.
9. Remove the fuel pressure regulator.
10. Inspect the regulator filter screen for contamination. If contaminated, replace the fuel pressure regulator.

To install:

1. Install the regulator filter.
2. Install the new O-ring on the fuel pressure regulator.
3. Lubricate the fuel pressure regulator O-ring with clean engine oil.
4. Push the fuel pressure regulator into the regulator housing on the fuel rail.
5. Install the fuel pressure regulator retainer. Tighten the regulator retainer screw to 71 inch lbs. (8 Nm).
6. Install the fuel return pipe retainer. Tighten the return pipe retainer screw to 71 inch lbs. (8 Nm).
7. Connect the fuel return pipe.
8. Connect the fuel pressure regulator vacuum line.
9. Connect the negative battery cable.
10. Inspect for leaks:
    1. Turn ON the ignition for 2 seconds.
    2. Turn OFF the ignition for 10 seconds.
    3. Turn ON the ignition.
    4. Inspect for fuel leaks.
    
    
11. Install the engine wiring harness into the retaining clips at the front of the engine.
12. Install the air intake resonator.

The mass air flow sensor will be fitted in the pipe work that comes from the air filter housing. Find the air filter housing and in the round pipe that goes towards the engine, there will be a wiring connector. this will be connected to your mass air flow sensor. Hope this helps

Fuel Filter The filter should be inspected for external damage and/or leakage at least once a year. The fuel filter should be changed only as necessary. Toyota Motor Corporation recommends replacing the carbureted fuel filters at 15,000 miles and 30,000 miles on fuel injected models. NOTE: Fuel lines and connections, fuel tank vapor vent system hoses and fuel tank bands should be inspected every 60,000 miles or every 36 months. The fuel tank cap gasket should be replaced 60,000 miles or every 72 months.
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REMOVAL & INSTALLATION Carbureted Engines The fuel filter on carbureted engines is a plastic cylinder with two ports for the fuel. It is usually located in the engine compartment near the charcoal canister.

1. Using a pair of pliers, expand the hose clamp on one side of the filter, and slide the clamp further down the hose, past the point to which the filter pipe extends. Remove the other clamp in the same manner. Grasp the clamps and slide them up the hose slightly above the filter ends
   
   
2. Grasp the hoses near the ends and twist them gently to pull them free from the filter pipe. Slide the hose off the end of the fuel filter end
   
   
3. Pull the filter from the clip and discard. Be carefull when removing the filter, some fuel may spill out if not held upright
   To install:
   
4. Install the new filter into the clip. The arrow must point towards the hose that runs to the carburetor.
5. Push the hoses onto the filter pipes, then slide the clamps back into position.
6. Start the engine and check for leaks.

Fuel Injected Engines 1993-97 MODELS

1. Turn the ignition switch to the LOCK position. Disconnect the negative battery cable and wait at least 90 seconds before proceeding with working on the fuel system. This will depressureize the fuel system. The fuel filter can be hard to locate on these engines
   Fig. 4: Exploded view of the fuel filter mounting - 1993-97 models
   Fig. 5: Disconnect the negative battery cable prior to all fuel system repairs
   CAUTION
   Failure to depressurise the fuel system could cause personal injury.
   
2. Disconnect the Intake Air Temperature (IAT) sensor wiring.
3. Loosen the air cleaner hose clamp bolt, the disconnect the four air cleaner cap clips. Fig. 6: Loosen the air cleaner hose clamp bolt
   
   
4. Spearate the air cleaner hose from the throttle body, and remove the air cleaner cap together with the air cleaner hose.
5. Disconnect the EVAP canister hose from the charcoal canister. Fig. 7: Remove both EVAP hoses from the charcoal canister
   
   
6. Remove the charcoal canister from the bracket.
7. Place a suitable container or shop towel under the fuel filter. Remove the union bolt and two gaskets, then slowly disconnect the fuel inlet hose from the fuel filter outlet. Fig. 8: Remove the union bolt and two gaskets from the fuel filter, then disconnect the inlet hose from the filter
   
   
8. Using a special wrench 09631-22020 or equivalent, disconnect the inlet pipe from the fuel filter. Remove the two bolts and the filter from the vehicle. Fig. 9: Using a special tool, disconnect the inlet pipe from the fuel filter
   Fig. 10: Remove the two filter mounting bolts, then separate the filter from the vehicle
   To install:
   
9. Install the fuel filter with the two bolts and tighten them to 43 inch lbs. (5 Nm).
10. Using the special wrench 09631-22020 or equivalent, connect the inlet pipe to the fuel filter. Tighten to 22 ft. lbs. (30 Nm). Using a torque wrench, tighten with a fulcrum length of 11.81 inch (30cm). Install the fuel inlet hose to the filter outlet using new gaskets and union bolt. Tighten to 22 ft. lbs. 30 Nm). Fig. 11: Install the filter inlet hose to the filter outlet, then tighten to 22 ft. lbs. (29 Nm)
    
    
11. Install the charcoal canister to the bracket. Connect the two EVAP hoses to the canister.
12. Connect the air cleaner hose to the throttle body. Install the air cleaner cap together with the air cleaner hose.
13. Attach the IAT sensor wiring.
14. Connect the negative battery cable. Start the engine and check for leaks. Reset any various digital equipment such as radio memory and the clock if necessary.

I'm guessing there should be a tube or pipe that goes to the valve cover. Is the hole about a 1/2 inch in diameter? If so that's the fresh air intake for your "crankcase ventilation system". That hole should not be left open because, dirt and dust can can go directly into the engine and crankcase. There should be a tube, they are usually plastic.

Replacement it when engine cold is better by steps below. - Remove Air filter - Remove intake duct - Remove thermostat housing. - Pull-out metal coolant. end-of pipe has not bolt or nut. Some Ex. photo
More info. Honda Accord 1992 Repair Manual

Hi, before the pump it is a loose connection or maybe a pin hole in the pipe, check all the connections and pipes for seepage, after the pump it will be a leak, i knowit sounds the same but after the pump the fuel is under pressure. It would appear that your system drawing air rather than forcing air in. daveg