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  #1  
Old 02-19-2011, 09:33 AM
Ford Tough
 
Join Date: Aug 2010
Posts: 416
Default Engine Revs when Braking - HELP!

Alright, Ive been having this problem for sometime now, and ive neglected to long. When I come to a stop, braking with my foot 100% only on the brake pedal, my engine will rev upto about 1100 rpm or so as I am just about to come to a full stop- it then drops to a normal idle speed.

It does not rev through the the entire slowing. My RPM actually goes under 1000 rpm when I am almost stoped, but then it revs and goes down.

I do not know what is causing this. I have read it could be a Vaccuum issue but I replaced one of the hoses that looked terrible.. And if it was vaccum wouldnt it to it through the entire braking experience?

What else could be an issue here? I think it is robbing my gas mileage, reving that little bit every single stop probably adds up here in the City.

Additional info, possibly related is that once in a blue moon my throttle will stick at a low rpm.. The pedal doesnt stick but the engine will hover from 900-1200rpm and wont stop unless I brake or give it gas- its barely rolls at this speed though 5mph max.. I usually restart the truck an its fine.


Any help would be awesome
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2002 Ranger XLT 3.0
General Grabber AT2 31/10.5/15, 15x7 ATX Slot, Hot girlfriend for passenger seat, Fabtech 2.5", Bilstein 5100, Poly Bumps, JBA Ceramic Coated Headers, Straigh pipe, Throttle Cable Mod, Air Box Mod, 5 Angle Valve Job, 180* Thermostat, Clear corners w/ Amber LEDs, Tinted Tails, 6000K Volt Digital HID Hi/Lo, K&N Drop-In, MAF Mod,
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  #2  
Old 02-21-2011, 12:04 PM
Ford Tough
 
Join Date: Aug 2010
Posts: 416
Default Re: Engine Revs when Braking - HELP!

bump
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2002 Ranger XLT 3.0
General Grabber AT2 31/10.5/15, 15x7 ATX Slot, Hot girlfriend for passenger seat, Fabtech 2.5", Bilstein 5100, Poly Bumps, JBA Ceramic Coated Headers, Straigh pipe, Throttle Cable Mod, Air Box Mod, 5 Angle Valve Job, 180* Thermostat, Clear corners w/ Amber LEDs, Tinted Tails, 6000K Volt Digital HID Hi/Lo, K&N Drop-In, MAF Mod,
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  #3  
Old 02-21-2011, 05:02 PM
Ford Tough
 
Join Date: Feb 2011
Posts: 244
Default Re: Engine Revs when Braking - HELP!

Quote:
Originally Posted by VegasRanger02 View Post
Alright, Ive been having this problem for sometime now, and ive neglected to long. When I come to a stop, braking with my foot 100% only on the brake pedal, my engine will rev upto about 1100 rpm or so as I am just about to come to a full stop- it then drops to a normal idle speed.

It does not rev through the the entire slowing. My RPM actually goes under 1000 rpm when I am almost stoped, but then it revs and goes down.

I do not know what is causing this. I have read it could be a Vaccuum issue but I replaced one of the hoses that looked terrible.. And if it was vaccum wouldnt it to it through the entire braking experience?

What else could be an issue here? I think it is robbing my gas mileage, reving that little bit every single stop probably adds up here in the City.

Additional info, possibly related is that once in a blue moon my throttle will stick at a low rpm.. The pedal doesnt stick but the engine will hover from 900-1200rpm and wont stop unless I brake or give it gas- its barely rolls at this speed though 5mph max.. I usually restart the truck an its fine.


Any help would be awesome
Have your power brake booster and lines inspected.
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  #4  
Old 03-04-2011, 01:40 PM
Learning to use the forums
 
Join Date: Mar 2011
Posts: 2
Default Re: Engine Revs when Braking - HELP!

VegasRanger02,

Im having the same problem with my 2002 ford ranger 4.0. Did you find out what the problem is. Im thinking that it could be the tps switch.

Thanks Heath
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  #5  
Old 03-04-2011, 05:06 PM
Ford Tough
 
Join Date: Aug 2010
Posts: 416
Default Re: Engine Revs when Braking - HELP!

No, I havent. Its not a major concern. I checked all the lines and they seem to be good. What is the TPS switch/ and where? Im not familiar.. that would definately be something Id try changing out.

My truck is funny sometimes it barely even does a rise in RPM, but sometimes it rises farther, and sometimes sticks. Ill shutdown the truck and restart it and itll be fine.. Idk if this is a computer issue.
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2002 Ranger XLT 3.0
General Grabber AT2 31/10.5/15, 15x7 ATX Slot, Hot girlfriend for passenger seat, Fabtech 2.5", Bilstein 5100, Poly Bumps, JBA Ceramic Coated Headers, Straigh pipe, Throttle Cable Mod, Air Box Mod, 5 Angle Valve Job, 180* Thermostat, Clear corners w/ Amber LEDs, Tinted Tails, 6000K Volt Digital HID Hi/Lo, K&N Drop-In, MAF Mod,
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  #6  
Old 03-04-2011, 05:18 PM
Hazardous to Your Health!
 
Join Date: Jan 2011
Posts: 9,968
Default Re: Engine Revs when Braking - HELP!

just to try....disconnect ur battery for awhile (more than 20 mins) and reconnect it
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Ford Ranger Edge Supercab, 2004 3.0 Auto, 2WD, 4.10 Axle 31x10.5x15 BF Goodrich All Terrain T/A KO's


My Truck Is My Mountain Bike's Ride!

Class III hitch, Rhino Bedliner, Almost Maxed T-Bar Crank, Tuff Country Add A Leaf, Custom Low Anchor Points, OEM ('99) Tow Hooks, Pro Comp Offroad Lights , Mustang Dome Light, Clear Corners, Slim Toolbox, Blinker Mod,Cargo Brake Light Mod,Expo Lighted Visors, Ultra Silverstar heads/fogs, Fog/high mod, Reverse/switched lights, Bike Fork Mounts
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  #7  
Old 03-04-2011, 05:40 PM
Ford Tough
 
Join Date: Aug 2010
Posts: 416
Default Re: Engine Revs when Braking - HELP!

Ive probably have had that done many of times since ive had the issue. I guess I could keep trying lol.
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2002 Ranger XLT 3.0
General Grabber AT2 31/10.5/15, 15x7 ATX Slot, Hot girlfriend for passenger seat, Fabtech 2.5", Bilstein 5100, Poly Bumps, JBA Ceramic Coated Headers, Straigh pipe, Throttle Cable Mod, Air Box Mod, 5 Angle Valve Job, 180* Thermostat, Clear corners w/ Amber LEDs, Tinted Tails, 6000K Volt Digital HID Hi/Lo, K&N Drop-In, MAF Mod,
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  #8  
Old 03-04-2011, 05:45 PM
Hazardous to Your Health!
 
Join Date: Jan 2011
Posts: 9,968
Default Re: Engine Revs when Braking - HELP!

worth a shot lol seems like it fixes alotta my problems haha
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Ford Ranger Edge Supercab, 2004 3.0 Auto, 2WD, 4.10 Axle 31x10.5x15 BF Goodrich All Terrain T/A KO's


My Truck Is My Mountain Bike's Ride!

Class III hitch, Rhino Bedliner, Almost Maxed T-Bar Crank, Tuff Country Add A Leaf, Custom Low Anchor Points, OEM ('99) Tow Hooks, Pro Comp Offroad Lights , Mustang Dome Light, Clear Corners, Slim Toolbox, Blinker Mod,Cargo Brake Light Mod,Expo Lighted Visors, Ultra Silverstar heads/fogs, Fog/high mod, Reverse/switched lights, Bike Fork Mounts
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  #9  
Old 03-04-2011, 06:00 PM
Learning to use the forums
 
Join Date: Mar 2011
Posts: 2
Default Re: Engine Revs when Braking - HELP!

The tps switch ( throttle position switch ) is located on the throttle body ( carburator ) it is a small switch with two screws holding it on. you can look on napa, autozone sites to see picture of it. I just bought my 2002 ranger last week, and this started the other day with the revs. I did some research and found this was a problem with the rangers. The tps switch cost about $30 dollars. Make sure you really clean the plug with electrical cleaner spray. Im going to try this with mine. make sure you install the tps switch back in the exact same spot. not to hard to do.

Heath
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  #10  
Old 03-05-2011, 02:31 PM
JOHN 3:16, 14:6
 
Join Date: Oct 2010
Posts: 547
Default Re: Engine Revs when Braking - HELP!

I have to agree with oldcarfart, Iam an old gear head for 40+ years! Have your break booster checked.
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