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Sergio 10/10/2019

2006 Mercury Montego Premier 6 Cyl 3.00L


Car starts but shuts off quickly will not stay on

Hard to start but when it does start it will only stay at idle. It shuts off as soon as you press the gas pedal. Fuel pump has plenty of pressure fuel injectors were changed EGR valve has changed spark plugs were changed cam sensor was changed and the crank sensor. Your help would be greatly appreciated

1 Answer


Jimm 10/11/2019

First question - what is the specific fuel pressure measured in two locations; at the fuel pump outlet and at the engine fuel rail? When you say 'plenty of pressure' exactly how much is plenty?

There are several possibilities - faulty fuel pressure regulator, faulty fuel pump, clogged air intake, faulty / clogged air filter, engine vacuum leak, faulty / dirty mass airflow (MAF) sensor - to list only a few.

Before replacing any more parts, and throwing money at the problem - recommend to perform diagnosis and testing to find out the root cause of the issue.


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