ABS engaging on Dry Pavement? - Page 2 - Ranger-Forums - The Ultimate Ford Ranger Resource


Drivetrain Tech General discussion of drivetrain for the Ford Ranger.

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  #26  
Old 11-03-2006
04 EDGE
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to add to that if the rear sensor is reading 0 then the other 2 should be reading 0 also.

all 4 tires roll at the same time so al 3 sensors will react the same at all times
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  #27  
Old 11-03-2006
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Right, i was told there are seperate sensors for ABS and the Vehicle Speed....Like, abs is reading one thing and the vehicle speed is another. So since the speedo is off, its saying im not traveling at any rate of speed, but the other sensor is reading i am traveling at 3 mph or w/e im going when the speedo says 0. Which is causing the abs issue when my speedo says 0....
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  #28  
Old 11-03-2006
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i have no ABS.. in turn.. no problems lol

i have a mustang rear end, and they do not have the tone ring, so i have no abs, and i had to take out the ABS bulb cause its always on
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  #29  
Old 11-03-2006
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why take the bulb out, just un-plug the module.

and the rear ABS sensor is also the speedo sensor there is no seperate sensor for the rear, whoever told you that dosent know what there talking about. the fronts however have there own sensors per wheel.

all 4 tires are the same size, so all 3 sensors should read the same wheel speed, unless something is wrong, but it cant be the wheels/tires because there all the same size and moving at the same speed.
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  #30  
Old 11-03-2006
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Bill was explaining it to me. I probably typed something wrong, i'll let him chime in and explain it over again.
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  #31  
Old 11-03-2006
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Bill?
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  #32  
Old 11-03-2006
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04lvl2
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  #33  
Old 11-03-2006
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< waiting for him to chime in.
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  #34  
Old 11-03-2006
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My old FX4 did the same thing with 32's. The ABS light never came on but the nasty ABS sound and jerking kicked in when coming to stops with the wheel cocked.
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  #35  
Old 11-03-2006
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Quote:
Originally Posted by 04 EDGE
john i hate to say this but your very wrong on all counts.

the ABS light does not have to be on for there to be a problem.

the ABS system should only be active when one wheel differs from another with speed or MPH. you must havent fixed cars very long or you just havent run into this problem on rangers/explorers yet. what happens is rust builds up under and around the sensor and does things to the sensor the computer doesn;t like. most of the time on these trucks the sensor will read 0 mph untill around 5 mph then it synks with the other 2 sensors, there will be no problems untill slow speed stops, turning, parking, with no ABS light or fault codes.
The ABS light will turn on if there is a difference in speed from the other sensors. I have never seen a bad sensor not throw a code. I have only done it for 3 years now but in my short time with Ford I never did encounter such a problem that didn't throw a light.
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  #36  
Old 11-03-2006
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Quote:
Originally Posted by 04 EDGE
< waiting for him to chime in.
He should this weekend or sometime soon, he isint online right now.

My idea is to correct to speedo via a tuner and see what happens....If its still screwy then i'll be looking to run a live data logger.
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  #37  
Old 11-05-2006
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Mark you have valid points I am not going to discount anything you have said. In my experience granted it has been all GM and Chrysler if there is an issue with one of the sensors you will get a code for that WSS. When I was talking to Mark about this he said it happened when he was turning, now its when he is going straight too lol. My thoughts were when making a right turn for instance, the left front wheels is going further inturn more speed and the left wheels have a shorter distance to go equalling less speed. Now this should all be taken into account in the ABS module but with the larger tires it may be out of the allowed tolerance. I agree that the only way that he will not sure is the monitor the data with a scan tool and come to conclusion that way. The tuner may help some but may not correct it. I cant say if its an issue with mine becuase I have had a tuner with 33s and 35s.
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  #38  
Old 11-05-2006
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Thanks Bill
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  #39  
Old 11-05-2006
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Have you check if theres rust between the sensor and the spindle? I dont know for ford but gm has a bulletin for a similar trouble which i cause by rust forming between the sensor and spindle i moves the sensor a little bit further from the abs wheel which cause a false lecture at low speed. I know its not a ford bulletin but all abs system work on the same principal so it could apply to your situation
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  #40  
Old 11-05-2006
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Quote:
Originally Posted by fredfx4
Have you check if theres rust between the sensor and the spindle? I dont know for ford but gm has a bulletin for a similar trouble which i cause by rust forming between the sensor and spindle i moves the sensor a little bit further from the abs wheel which cause a false lecture at low speed. I know its not a ford bulletin but all abs system work on the same principal so it could apply to your situation
"the ABS system should only be active when one wheel differs from another with speed or MPH. what happens is rust builds up under and around the sensor and does things to the sensor the computer doesn't like. most of the time on these trucks the sensor will read 0 mph untill around 5 mph then it synks with the other 2 sensors, there will be no problems untill slow speed stops, turning, parking. no ABS light or fault codes"


it always helps if you read all the posts
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  #41  
Old 11-05-2006
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and again shouldn't matter what tire size you run as long as there all the same size the wheel sensors shouldnt' change.
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  #42  
Old 11-05-2006
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Ever since i put my spindles on my abs light has been on. Also when im slowing down i feel the pulsation in the petal like a tire is out of round... Its not my rotors because i did my brakes not too long ago and all my tires are balanced. When i scanned it at work it says LF speed sensor. Since then i havent done anything but im planning on replacing the sensor. If this fixes my problem ill let you know because it sounds like we have the same issue.
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  #43  
Old 11-05-2006
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The ac current produced by the sensor change depending on the speed of the ring and the distance from the ring thats the trouble for gm the sensor moves backward and sends less ac signal which means the wheel is turning slower. The slower the wheel the more the ac is out of phase. Had the same symptom on a blazer 02 and correct it by cleaning the rust form between the sensor and the spindle.
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  #44  
Old 11-06-2006
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So if i have rust occouring around the spindle and the sensor, is there any way to tell which sensor it is? (besides the live data logger)

Jaren- What did you use to "scan" your truck?
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  #45  
Old 11-06-2006
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theres no way to tell besides doing a live data scan. and this i can tell you mark, you will never get the old sensor out of the bearing housing without distroying it
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  #46  
Old 11-06-2006
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I see...Where can you get them from, and how much are they?
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  #47  
Old 11-06-2006
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ford motor company, like 40 bucks each.
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  #48  
Old 11-08-2006
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Thanks for the info, i have the ABS disabled for now until the programmer comes. I doubt it will fix my issue, but you never know. If the ABS is still engaging after the tuner with corrected speedo, then i have pretty much narrowed it down to the front ABS sensors. Either i need to replace, or clean them. Thanks for all the replies everyone, espically Mark. I'll let you guys know what happens in this thread after i get the speedo corrected...Thanks again.
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  #49  
Old 11-08-2006
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Quote:
Originally Posted by 04 EDGE
why take the bulb out, just un-plug the module.

and the rear ABS sensor is also the speedo sensor there is no seperate sensor for the rear, whoever told you that dosent know what there talking about. the fronts however have there own sensors per wheel.

all 4 tires are the same size, so all 3 sensors should read the same wheel speed, unless something is wrong, but it cant be the wheels/tires because there all the same size and moving at the same speed.
no, our trucks measure speed at the t-case..or trany..i think its the t-case

maybe 2wd its the rear end

Last edited by INT3RC3PTOR; 11-08-2006 at 12:28 PM.
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  #50  
Old 11-08-2006
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Quote:
Originally Posted by INT3RC3PTOR
no, our trucks measure speed at the t-case..or trany..i think its the t-case

maybe 2wd its the rear end

our trucks read from several different spots to get the best reading from my understanding.
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