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Mass Air Flow Sensor 1997 XJ6L

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drpulpit

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Hello Jag Friends:

I have a'97 XJ6L that my wife loves, but the Jag is having some issues.

My mechanic has boiled down to what he thinks is the Fuel Pump (least likely) or the Mass Air Flow Sensor.

the symptoms: engine sputters and quits, when starting from a stopped position, or when accelerating quickly from a steady speed.
the fuel pump, he has tested as producing the correct flow and psi.

He had earlier repaired the alternator which had several burned out diodes.

Any suggestions?
 
Most of the issue we had with those cars were related to bad gas, ie. water, destroying the pumps, filters and injectors.
Assuming you have established good spark, clean air filter and good fuel pressure.


drpulpit said:
Hello Jag Friends:

I have a'97 XJ6L that my wife loves, but the Jag is having some issues.

My mechanic has boiled down to what he thinks is the Fuel Pump (least likely) or the Mass Air Flow Sensor.

the symptoms: engine sputters and quits, when starting from a stopped position, or when accelerating quickly from a steady speed.
the fuel pump, he has tested as producing the correct flow and psi.

He had earlier repaired the alternator which had several burned out diodes.

Any suggestions?
Click to expand...
 
I'm with Steve. By '97 they at least got rid of the dual tanks.

There's a "lift pump" in the tank that may be intermittantly working due to age/crud/water, too. Pick one.

I'd be for getting that pump out and replacing it.
 
Is it setting a "code"/check engine light on? Anyone check the Throttle Position Sensor? Is the fuel filler drain area clear? Take a fuel sample, and let it settle, and inspect for water in the fuel. What do the plugs look like? What kind of plugs? Never use platinum plugs....Have the mechanic connect a fuel pressur guage, and drive the car and observe it when the car stumbles. You can do the same thing with the air mass meter, and a DVOM.
 
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