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Rpm drops driving down road some times and getting poor milage

Rpm drops while driving on road sometimes

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Get a diagnostic done but could be the O2 sensor .... if your vehicle has one ?

Posted on Apr 02, 2015

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2003 olds alero 4 cly rpms drop while driving down road


Get the error codes read at your favorite auto parts store.
I will guess you have a fuel system delivery problem, which
is affected by a number of devices.

Apr 02, 2015 | Cars & Trucks

1 Answer

I have a 97 Toyota RAV4 which sometimes while driving down the road the car seems to shift to nutral. The RPM's will go up to about 4000 and the car seems to only be coasting. I can let off the gas...


Check you transmission fluid for proper levels. If ok, have the transmission oil and filter changed!! If that doesnt remedy the issue, its possible the transmission needs to be replaced or rebuilt!!

May 25, 2011 | 1997 Toyota RAV4

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It runs rough sometimes it dies, I have tuned it up , plugs dist cap, wires rotor the computer , It has very poor gas milage .it has a 2300 with automatic trans,


have the intake gasket checked. spray carb/choke cleaner around intake gasket and if rpms change then you have a bad gasket which causes rough idle bad fuel econ

Apr 09, 2011 | Ford Ranger Cars & Trucks

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Car jerks sometimes while driving down the road also in the morning time acts like it wants to driving down the road.


Time to have the timing/tuning checked up. The fault is relative to a cold engine and can be due to poor fuel flow/delivery or poor electrics.
So the check up for replacement of suspected components like plug, filter, coil , HT wires fuel pressure must be made.

Sep 16, 2010 | 2004 Pontiac Grand Prix

1 Answer

1998 Yukon high idle sound with bad gas mileage.


What you have is the torque converter clutch,cycling on and off.
When it is off.your rpm will go up and your milage will go down
First-check to see if your brake switch, on the back of the brake peddle, is loose or misadjusted. When you apply the brakes,the first thing to happen, is that you unlock the converter,so your trans is not connected directly to the motor,or you would stall. Then below 42 MPH,your trans is working off the converter, as a pressure multiplier ,based on rpm
Second- switch okey. You remove trans pan and change TCC Solenoid.

Let me know if if you need more guidance

May 08, 2010 | 1998 GMC Yukon

1 Answer

1999 Durango: while driving down the road my rpm gage drops to z...


this sounds like a bad connection or a bad VSS sensor... either way it needs replacement/repair.. if the tach sends 0 info to the ECM the car will quit or run in an open loop causing it to run real poor... have someone like Auto Zone??? scan it for free and give you the computer code results.... this will help you unravel the mystery of the stalling.

May 06, 2010 | 1999 Dodge Durango

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Honda CR-V - 2004 - High RPM not returning to Idol RPM ????


i'am no expert on this car, but i would chk. the T.P.S. (throutle positioning sensor) there also may be carbon build up on throutle butterfly, not letting it close completely when you take your foot off the pedel.

Jan 14, 2009 | 2001 Honda CR-V

2 Answers

Ford f350 loss of power and poor fuel milage


had same problme was my wastegate stuck open wouldnt let pressure build up in turbo

Jan 06, 2009 | 2006 Ford F 350 Super Duty

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