Flooding/overfuelling cranking with the plugs out, fuel is bucketing out of the plug holes. the car has a new coolant sensor and air flow meter. does anyone know of any cmmon faults?thanks,col.

Did you hook up a scan tool to check engine sensor data parameters - fuel trims ,mass air flow sensor .HO2 sensors ? Go on youtube check out scanner Danner videos .

How do you know its flooding out? Black smoke from tailpipe? An over fueled engine can be caused by numerous things. Check fuel pressure regulator on the fuel rail for an internal leak. Remove the vacuum hose to the regulator and check to see if fuel is in the vacuum hose. IF so, replace the regulator. You will need a scan tool to check the operation of the coolant temp sensor,map sensor,mass air flow sensor as these sensors/wiring circuits will adversely affect fuel delivery

Do you have a scan tool ?
049 Engine Hard to Start or No Start Scan Data for Vacuum Leak
048 Engine Hard to Start or No Start Scan Data for Starting Problems
047 Engine Hard to Start or No Start Scan Data for Ignition

Take off the radiator fill cap.
Top off the radiator.
Crank the engine.

Are there bubbles or is there water spouting out of the radiator fill hole?

Yes: likely cylinder head gasket failure or cracked header.

No: Pressure test cooling system after topping off with a pressure tester. Locate source of leak.

Assuming the water leak isn't anything to do with the non-starting situation, which it probably is though form the sound of it, also check the following:

1) Air filter
2) Fuel filter
3) Manifold Air Pressure sensor.
4) Mass Air Flow sensor.

My Vauxhall (Opel) Zafira 2004 1.8 liter 16V Petrol Auto
had COLD START problem; cold engine does not start no
matter what! I have changed the following parts, one after
another:
1. New Coil pack
2. New Spark plugs
3. New Battery
4. New Mass Air flow oxygen meter
5. Air filter
6. Oil filter
7. Engine oil
8. Fuel filter
9. Premium Petrol
10. Engine coolent water sensor
Still the same problem. Then changed 'Crank sensor'. And
now the car starts fine without any issue!!
Faizur Rahman <[email protected]>

NEED HAVE VECHICLE CODE SCANNED FIRST LOOK FOR FAULT CODES MANY THINGS WILL CAUSE NO STARTING,LIKE BAD CRANKSHAFT POSITION SENSOR.FAULTY CAMSHAFT POSITION SENSOR,BAD SPARK PLUGS FOULED OUT BY FLOODING ENGINE DUE TO LEAKING FUEL INJECTORS,BAD ENGINE COOLANT TEMPERATURE SENSOR,BAD MASS AIR FLOW SENSOR.FAULTY ECM. CODE SCAN VECHICLE FIRST.IF NO FAULT CODES CAME UP YOU COULD HAVE FAULT IN FUEL SYSTEM, COULD HAVE STOPPED UP FUEL FILTER,BAD FUEL PUMP RELAY OR FUSE THE FUEL PUMP COULD BE FAULTY. TURN IGNITION SWITCH TO ON POSITION LISTEN FOR FUEL PUMP OPERATION IN FUEL TANK, YOU SHOULD HEAR FUEL PUMP RUN FOR FEW SECONDS THEN TURN OFF.IF NO FUEL PUMP BAD MORE LIKELY BUT CHECK FUSE AND RELAY FIRST BEFORE BUYING NEW FUEL PUMP.DONT BUY NEW PARTS HAVE VECHICLE CODE SCANNED FIRST USING DIAGNOSTIC SCANNER YOU COULD HAVE BAD CONTAMINATED FUEL.

An engine will flood if there's too much fuel going in because of a stuck choke, a bad spark not igniting the fuel, failed temperature sensors, bad fuel regulator, timing...the list goes on.

The amount of fuel delivered to a properly functioning injected car is determined by sensors mounted throughout the vehicles air intake system. These sensors work together along with the ecu to control the fuel / air mix delivered to the cylinders.

We would need to isolate the components that have impact on the duration of time the injectors stay open. In troubleshooting it is often best to work backwards.

1. Injectors - Are they leaking? 2. Pressure regulator - is the pressure at the fuel rail the right pressure?? (40psi for most fuel injected cars) 3. TPS- throttle position sensor- is this reading accurately...there are several different styles of these 4. Air flow meter - these also come in several varieties varys from mass air sensor / simple vane meters. 5. during startup there is a seperate circuit called the throttle bypass valve - this also may not be functioning if the flooding is occuring rapidly during startup. If the car starts and runs for a while than floods. this is probably not the culprit. 6. ultimately the ECU could have a problem as it is the link in the chain that ties everything together....though not likely. Any of these these would have the potential to flood a vehicle if they were not functioning properly. The amount of fuel delivered to a properly functioning injected car is determined by sensors mounted throughout the vehicles air intake system. These sensors work together along with the ecu to control the fuel / air mix delivered to the cylinders. We would need to isolate the components that have impact on the duration of time the injectors stay open. In troubleshooting it is often best to work backwards. 1. Injectors - Are they leaking 2. Pressure regulator - is the pressure at the fuel rail the right pressure?? (40psi for most fuel injected cars) 3. TPS- throttle position sensor- is this reading accurately...there are several different styles of these 4. Air flow meter - these also come in several varieties varys from mass air sensor / simple vane meters. 5. during startup there is a seperate circuit called the throttle bypass valve - this also may not be functioning if the flooding is occuring rapidly during startup. If the car starts and runs for a while than floods. this is probably not the culprit. 6. ultimately the ECU could have a problem as it is the link in the chain that ties everything together, but it's not likely.
This is just a list of things that could cause your car to flood!

hi, please check you oil level, ( on level ground). when the car is running place an old rag in front of you and take off the oil filler cap (be careful not to get near the fan, fan belt) if no oil comes out of the filler hole possible fault: oil pick-up pipe (in sump partial block), / oil filter in sump ( blocked), oil pump worn, oil relief valve (returning oil back into the sump), spring weak / broken. the (E C U) ENGINE CONTROL UNIT has many sensors that can stop the engine: but try cleaning the (EGR) ENGINE GAS RECIRCLING VALVE, this valve recycles gas back in to the engine, ( must be CLEANED with BRAKE FLUID) this is a VERY DIRTY job, as this gets block with carbon (EXHAUST PARTICULES). the E C U will detect all of these sensors: the (ECT), TOP OF ENGINE engine coolant temperature sensor rough tick over, (HO2), EXHAUST DOWN PIPE, heated oxygen sensor checks mixture of fuel, can adjust air / fuel, it tries to keep car going / may flood engine. (M A F) mass air flow, adjusts fuel / air retio this sensor can so much fuel to the engine it may flood it. flooded engine mean WET spark plugs. i would put it on dianostic machine to check these out before paying for extra sensors. gerry

plugged air filter will result in too lean.not too rich. have the fuel pressure tested. overfuelling will result in the catalytic converter overheating.if the 02 sensor on the catalytic is no good,it will not sense unburnt fuel and the ecu will overfuel. check the air inlet hose and the airflow meter

air flow meters are expensive i would first replace the coolant temperature sensor