When we start the engine raptor mass flow metering valve not working...
When we start engine.engine.engine showing shut down indignation and show alarm history differential fuel pressure low.then we check alarm history indignation found fuel metering not working...we check signal supply to valve all is ok.....but metering valve not working
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P1095 Mass air flow ahead of throttle valve implausible (too high) Possible fault causes: - Hot-film mass air flow meter faulty (battered) - DME control module faulty (ambient pressure sensor at fault detection threshold)
Your car cold start valve puts more gas into the system keeping your engine running higher RPM. When you car warms up, the cold start valve will stop working and your car RPM will drop. What you could have is a vacuum hose disconnected which puts more air into your engine - therefore when you press on the gas pedal, your engine would shut off or you find lack of power and then shut off.
If you can get it to an Autoparts store, ask them to read codes.
It sounds like an ignition timing problem, which codes should indicate. There are other sensors that may contribute for example an air mass meter but should show up in the bad code reading.
I personally had a problem with an air mass meter. Engine ran terrible. Foot on the gas eventually got me home.
The air mass sensor is located on the left hand side of the engine compartment. Follow the large hose which starts out as plastic down and to the front of the car. you will reach a rubber hose about 4" in diameter. It is attached to the back of the air mass sensor.
They stopped using air flow meters in 1979 (I beleive) Then they switched to what they call a "hot wire air mass sensor".
Rather than take a stab in the dark replacing items - get the codes scanned and this should show what area the fault lies in. Normally if there is a fault with the MAF (mass air flow meter) it would normally show as a check engine light (MIL) - is this warning on?
So many things can affect these engines from O2 sensors, coil misfires, bad cable connections etc etc. - so best move get the car scanned.
Hope this helps (and saves money) good luck.
YOU NEED 2 VOLT METERS.FIRST OF ALL START ENGINE.LET IT GET OPERATING TEMPERATURE THEN TURN OFF ENGINE.THEN YOU CONNECT TWO VOLT METERS TO THE TEST CONNECTOR.TURN IGNITION ON AND CHECK THAT CURRENT FLOWS TO ONLY ONE VOLT METER.IF BOTH VOLT METERS SHOW CURRENT FLOW REMOVE THE CAP AND TURN THE ADJUSTING SCREW COUNTERCLOCKWISE UNTIL ONE VOLT METER SHOWS CURRENT.IF NO CURRENT IS REGISTERED BY EITHER VOLTMETER TURN THE ADJUSTING SCREW CLOCK WISE UNTIL ONLY ONE VOLT METER SHOWS CURRENT.INSTALL THE CAP ON THE ADJUSTING SCREW AND DISCONNECT THE THROTTLE SENSOR CONNECTOR.CONNECT AN OHM METER TO THE THROTTLE SENSOR TERMINALS.OPEN THE THROTTLE VALVE AND CHECK THE RESISTANCE READING FROM THE THROTTLE SENSOR.AT IDLE THE THROTTLE SENSOR SHOULD SHOW ABOUT ONE KILO OHM RESISTANCE.AT WIDE OPEN THROTTLE THE SENSOR SHOULD SHOW ABOUT 5 KILO OHMS RESISTANCE.ANY RESULTS OTHER THAN THESE.REPLACE THE THROTTLE SENSOR AND RETEST.
Try to unplug the mass air flow meter. The mass air flow meter is atached to the air filter housing on the left of the engine bay at the front edge (left side when sitting in the drivers seat). It will be a somewhat flat 5 or 6 pin connector that mounts to the air box on one side and goes to the black air intake tube that goes down to the back of the engine.
Do it with the key off of course. With the mass air flow meter unplugged start the car and see if it will idle. if it does the mass air flow meter is bad. If the car will still not run then there is a good chance the Eletronic Throttle Module (ETM) is failing. The ETM is under an extended waranty from Volvo for 10 years or 200,000 miles.
I would suggest taking it to a garage or directly to the dealer.
Of course there are numerous other things it could be, but the Mass Air Flow Meter and the ETM are the most likely.