Question about 2000 GMC Jimmy

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2000 GMC Jimmy slow acceleration until 3000 rpms

It seems that when I first start and begin to drive the vehicle, the acceleration is very slow until the engine hits 3000 rpms. Then the vehicle will shift into second gear and begin to pickup speed as normal. This just started happening, and doesn't do it all the time but is happening more often. I don't think it's a transmission problem because I don't have any other shifting problems.

I've done all the usual preventitve maintenance. The vehicle is 4x4 V6 4.3L, has 76,000 miles and I've never experienced any major problems. Any help would be appreciated!

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  • bmgordocamar Mar 02, 2009

    i have the same problem with my jimmy

  • Anonymous Mar 07, 2009

    I am having the same problemdoes anyone have a solution. i recently changed the fuel filter

  • tevon_c Mar 12, 2009

    my 2000 jimmy wont switch into 2nd gear until 3k rpm, it also wont reverse. it makes a weird/strange sound

  • JoeC Oct 23, 2011

    I've since discovered the problem I originally posted about was caused by the Mass Air Flow Sensor. A local mechanic cleaned it for me and no problems since then!!!

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I have the same problem when i start it up it takes a while but then seens to pickup as i continue driving, and doesnt happen until i shut it off and restart again. My mechanic told me that it was not the fuel pump because if that was the problem, it would just break meaning; it would not operate basically when it wants to. It would just work or not no in between. I was thinking maybe it could be the the Master Airflow Sensor but i have to look more into that. If anyone eventually finds a solution comment on this add. Thanks

Posted on Oct 23, 2011

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You could check the fuel pump i recently had some problems with my punp after i replaced it where i would get to 3k rpms and it would sorta shut down and wouldnt go past it untill i let off the pedal

Posted on Nov 18, 2008

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1 Answer

Have an fx45.Should the tach read 25-3000 ROMs when moving at 75mph? Auto tranny seems like it should be in higher gear.


there is not info to be able to give a definite answer
to work it out
you have top know the diff ratio, wheel tyre circumference to be able to work from rpms of the engine to road speed
However as a pointer, most cars will be around 3200 rpms at 60mph as this will be direct drive and od causes a drop in rpms
Being an automatic find yourself a good section of low traffic road and start from stop slowly increase the rpms and watch the rpms. keeping the accelerator steady you will see when the auto changes by a drop in rpms. slowly increase road sped until you see the next drop in rpms and so on. Over drive normally comes in around 55 mph or around 3000rpms
I would think that it is working because 3500rpms at 75mph is reasonable rpms to be expected. If it wasn't working I would expect the rpms to be around 3800 to 4000.at 75mph

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Hello
The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

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Recall 84V106000: Possible Accelerator Cable Wear POSITIONING OF THE ACCELERATOR CONTROL CABLE IN THE ENGINE COMPARTMENT COULD RESULT IN ABNORMAL WEAR TO THE CABLE. THE CABLE COULD BEGIN TO FRAY AND UNWIND.
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