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2005 Mercury Sable Rpm/ shifting issue
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Ryan.Quiles
New User
Apr 22, 2013, 11:33 AM
Post #1 of 2
(1611 views)
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2005 Mercury Sable Rpm/ shifting issue
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Hey guys,
About a week ago my check engine light came on and since its my first car I freaked out. I opened the hood when i got home and found that upon starting the car the engine would rev and vibrate slightly and then stop to continue again. After about three minutes the movement would cease and the car would seem fine. Driving around today i realized that accelerating from a red light my car would shoot too 2500 rpm and then settle at 1250 rpm. When i turn the car on i see the rpm fluctuating from about 750 rpm to as low as 500. Before the check engine light it would rarely drop beneath 1000. Another problem i have is after changing gears my car would seem to lurch a little bit then go, but ths has been the way since i bought it.
2005 Mercury Sable Ls 3.0L 6cyl 4A 178000 miles
Thanks for your help
Ryan Quiles
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 22, 2013, 11:44 AM
Post #2 of 2
(1604 views)
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Re: 2005 Mercury Sable Rpm/ shifting issue
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The "check engine" light is an indicator for a system that monitors many electronic functions in the system, also called the "malfunction indicator lamp" (MIL). It can come on for any of hundreds of different causes from any of the systems that the computer monitors. Some are very important and can lead to further component or engine damage and some are emissions related not as serious but still a problem and need to be repaired.
Your first step is to have the computer scanned to retrieve the trouble codes that were set when the check engine light came on. Those codes will give you specific information about what the computer saw and will get you pointed in the right direction to find your problem. With a 1996 or newer and some 95 cars and you have an AutoZone or Advanced auto parts in your area, they will read them for free. Once you have these code numbers, we can be a lot more specific about what your problem may be.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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