Car has high RPMs and low MPH

2001 NISSAN XTERRA
93,450 MILES • 6 CYL • 4WD • AUTOMATIC
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Hello. My 2001 Nissan Xterra (4WD) has been dragging recently. I had a problem where i started the car and when i shifted it into any gear besides neutral, it shut off. Once the car warmed up, I was able to drive normally. However, now the car displays really high rpms at low speeds before shifting to a normal rpm (i.e., when driving 20 mph down a residential street, the car rapidly climbs to 4RPMs and then shifts gears to 1-2 RPMs). Any thoughts on what service for my car? I am away and need to quickly drop by a mechanic/auto repair before I start my workweek. Thank you in advance!
Nov 27, 2010 at 8:12 PM
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MHPAUTOS
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I would be starting with a diagnostic scan, not all faults will set a MIL check light, start here and report any codes in the system here for further assistance.

mhpautos
Nov 27, 2010 at 8:31 PM
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Thanks! I got a diagnostic recently and everything was A-OK...was a bit surprised as I had not done any major road trips/put any heavy mileage on my car following this. But I will drop it to the shop Monday morning.
Nov 27, 2010 at 8:32 PM
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MHPAUTOS
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Just re check that there are no loose or damaged vacuum lines as well,

mark (mhpautos)
Nov 27, 2010 at 8:39 PM
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Will do. I had to tow my car with a UHaul about 150 miles recently for a move, so there may have been some damage. Would that have affected the vacuum lines?
Nov 27, 2010 at 8:43 PM
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MHPAUTOS
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normally no, as these are all up around the manifold and out of harms way, they normally perish and split with engine heat.

mark
Nov 27, 2010 at 8:50 PM
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Ok yes, Ill report back on the diagnostic. I was thinking of dropping my car at Aamco instead of my usual mechanic as I figured they could be quick in servicing and turnaround - but Im worried about if this is a severe problem they would overcharge? Should I just stick to my usual mechanic and wait it out?
Nov 27, 2010 at 8:52 PM
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MHPAUTOS
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Your usual mechanic should be fine, they will have any past history and i feel you will get better service from a private operator, if you have been using him for some time go there.

mark (mhpautos)
Nov 27, 2010 at 8:57 PM
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Thanks Mark. I appreciate all your help.
Nov 27, 2010 at 8:58 PM
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MHPAUTOS
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let me know how you get on, good luck and than you for using 2carpros.

mark (mhpautos) Australia.
Nov 27, 2010 at 9:05 PM