Speed Bumps on Cruise Control - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Cars and PAG Vehicles > Ford Taurus | Mercury Sable | Ford Taurus SHO | 1986-2007
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

Ford Taurus | Mercury Sable | Ford Taurus SHO | 1986-2007 Forum for discussion of the Ford Taurus, Mercury Sable and Ford Taurus SHO. Covers vehicle years: 1986-2007

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 11-05-2010, 21:06   #1 (permalink)
Registered User
 
Join Date: Dec 2008
Location: Montana
Posts: 6
Speed Bumps on Cruise Control

Hey everyone, first off thank you for reading this message. When I'm flying down the highway, I generally always put on the cruise control and notice every now and then, the RPMs will bump up a notch then down, like the car can't decide if it needs an extra boost or not for a split second. It seems to happen at semi level road or going up very small inclines. Is there a sensor or speed control device i can replace to fix it? Or is this an early warning that the tranny might be going out? Its rather annoying and the mechanics i've talked to have no clue what could be causing it.

Thanks!

2005 Ford Taurus SE, Vulcan V6
beamermt25 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-05-2010, 21:23   #2 (permalink)
Registered User
 
ROBERTSUNRUS's Avatar
 
Join Date: Sep 2010
Location: Lakewood, Ca.
Posts: 84
Re: Speed Bumps on Cruise Control

Hi, here is one possibility. As you are going down the road at highway speeds, your vehicle will be in overdrive; When you hit a slight down grade, the cruise control will let off of the throttle. When you let off of the throttle, with or without your cruise control on, your torque converter will release/un-lock, and your RPMs will slightly increase as you get back into the throttle or maintain it. The torque converter will lock up again and reduce your RPM as you resume your speed. This is normal.
__________________
BOB
2000 Navigator 1959 Galaxie 2005 Airstream
ROBERTSUNRUS is offline   Reply With Quote
Old 11-24-2010, 20:40   #3 (permalink)
canuck
 
360ci's Avatar
 
Join Date: Nov 2007
Location: Waterloo
Posts: 2,475
Re: Speed Bumps on Cruise Control

You can ask your shop about replacing the TPS and/or IAC (throttle position sensor or idle air controller). Generally when one goes the other one will go at some point after. Both run about $40, but dealers charge at least twice that, so shop carefully if you want to try that. Both sensors are located above the intake manifold.

Remember speed costs money.
__________________
'00 Durango R/T 360ci 290hp (modded); 138,500m
'06 Pontiac G6 GT 3.5L 220hp; 44,000m
'12 Chrysler 200 Limited 3.6L 283hp; 13,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!
360ci is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Cars and PAG Vehicles > Ford Taurus | Mercury Sable | Ford Taurus SHO | 1986-2007



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 21:52.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.