2000 GMC Jimmy Surg

2000 GMC JIMMY
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FOSTERJ
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Engine Mechanical problem
2000 GMC Jimmy 6 cyl Four Wheel Drive Automatic

I have a 2000 GMC Jimmy and when driving at a steady pace somtimes the RPM's surg up 100-300 rpm
The shop told me it was the mas air flow sensor and replaced it 356.00. Once the car warmed up and I was a couple of miles down the road the surg returned like it always does? Oh and yes the air conditioning is off. The RPM's do not surg when I am accelerating. Only when I'm at a level RPM range.
May 5, 2009 at 7:57 AM
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RACEFAN966
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How old is the fuel filter? What is the fuel pressure doing when this is happening? Let me know what you can. Thanks.
May 5, 2009 at 10:37 AM
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FOSTERJ
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Fuel filter is probably the original. Not sure regarding the fuel pressure. Also just to clarify it doesn't always surge only about 20% of the time when driving at a steady RPM. I will try and look at the feul pressure and see what it's doing.
May 5, 2009 at 11:31 AM
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RACEFAN966
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Well if the fuel filter might be original then replace it even if it don't fix the problem it is in need anyway. The fuel filter should be changed once a year. So start with that and see what it does. Then you can get to checking fuel pressure if it continues. Let me know how it goes.
May 6, 2009 at 10:02 AM