Recent Topics
Oil For High Sustained RPM on BMW S52
by ZEK
06/21/18 10:41 PM
Chevy brought the blazer back
by WiskyBadger
06/21/18 10:07 PM
LC20 and uses in modern motor oil
by synman
06/21/18 10:01 PM
Full Synthetic CJ-4 or > 5W-30 or 10W-30
by LeTempt
06/21/18 09:57 PM
2018 RAM 1500 EcoDiesel
by OVERKILL
06/21/18 08:37 PM
Fram SureGrip coating
by mobilaltima
06/21/18 08:24 PM
Manual transmissioned electric car
by mjoekingz28
06/21/18 06:45 PM
1991 Toyota Previa New JDM engine Redline
by Kurtatron
06/21/18 06:26 PM
8 yr old channeling John Bonham
by Toy4x4
06/21/18 06:02 PM
Traveller nlgi 2
by Spitter
06/21/18 05:33 PM
Upgrading the Kohler 7000 series air cleaner
by Patrick0525
06/21/18 05:08 PM
Any nano reefers here?
by RichardS
06/21/18 05:04 PM
ARC remanufactured Power Steering Pump
by Pajero
06/21/18 04:58 PM
John Deere "Easy Change" System gimmick
by SnowmanCO
06/21/18 04:55 PM
Oz Planstic Bag Bans - not so green.
by Shannow
06/21/18 04:31 PM
help me choose...
by chaindrive
06/21/18 04:07 PM
France F1 Grand Prix
by DeepFriar
06/21/18 03:16 PM
Valvoline High Mileage with maxlife tech semi-syn
by bradtech
06/21/18 03:16 PM
Best additive in oil to clean sludge?
by ffgb
06/21/18 02:19 PM
Who is a Dirt Track regular?
by thooks
06/21/18 01:39 PM
Newest Members
ZEK, Dudewayne, kmdz, harborbirds, frascati
65292 Registered Users
Who's Online
40 registered (2strokeNorthstar, Billbert, alphadog, BanzaiJimmy, Atesz792, Artem), 938 Guests and 30 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
65292 Members
67 Forums
285749 Topics
4768855 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#4488660 - 08/14/17 07:23 PM abs not working correctly 97 explorer 4wd
rollinpete Offline


Registered: 03/20/17
Posts: 453
Loc: West Ma.
Hi Bitogers I have a problem with my abs system, maybe you guys can help me with... with all the fuses in and no light on dash comes on (no codes) go down the road, brakes work as they should, but just before I get to a complete stop the pedal will go to the floor and a groan noise from power booster...I can feel a vibration in the pedal when it does this...Doesn't do it all the time, about 3 out of ten times ...I've replaced the rear speed sensor that mounts on top the differential, I took off the two front speed sensors and cleaned them.. still does the same thing...Im running it now with the abs fuses out, and the brakes work as they should, the only problem is abs light is on now, and it'll probably lock up on ice... not too worried about the ice driving, since the 70's had lots of cars without abs, just that stupid light bugs me, plus I would want it to work as it should...Anyone have any Ideas... Thanks
_________________________
Pete.
97 Ford Expl.Sport 4.0 ohv 4wd 5spddrive183k miles
Last Change;
Penn. Plat. HM 5w30
Fram xg8a, Fram CA8141

(Oil) Where would we be with out it.


Top
#4488669 - 08/14/17 07:32 PM Re: abs not working correctly 97 explorer 4wd [Re: rollinpete]
Ethan1 Offline


Registered: 12/29/14
Posts: 1632
Loc: 'murica
What is the condition of your brake linings? I had exactly your symptoms in a Ranger that needed rear drums and shoes.

Top
#4488699 - 08/14/17 08:05 PM Re: abs not working correctly 97 explorer 4wd [Re: Ethan1]
rollinpete Offline


Registered: 03/20/17
Posts: 453
Loc: West Ma.
the rotors and pads fairly new about 10k on them, linings? you may have something, do you think the front hoses could be stretched, they all look okay but who knows...still why would they work okay with the fuses out...doubt theres a way to check them shrug
_________________________
Pete.
97 Ford Expl.Sport 4.0 ohv 4wd 5spddrive183k miles
Last Change;
Penn. Plat. HM 5w30
Fram xg8a, Fram CA8141

(Oil) Where would we be with out it.


Top
#4488710 - 08/14/17 08:16 PM Re: abs not working correctly 97 explorer 4wd [Re: rollinpete]
OVERKILL Offline


Registered: 04/28/08
Posts: 36452
Loc: Ontario, Canada
My father had the exact same situation on his Expedition. Ended up being a baffed wheel speed sensor. Put a scanner on it and monitor them. Which one is buggered up will be readily apparent when you recreate the issue.
_________________________
2016 Durango Limited
2016 Grand Cherokee SRT

Top
#4488713 - 08/14/17 08:20 PM Re: abs not working correctly 97 explorer 4wd [Re: rollinpete]
Trav Offline


Registered: 11/20/06
Posts: 18885
Loc: MA, Mittelfranken.de
You may have a bad front wheel speed sensor, cleaning it does nothing for it if its not reading correctly. Put a scan tool on it and see what the readings are for L/R. I had a 99 ranger do this on me.
_________________________
ASE L1, Master. Deutsch Meisterbrief.

Top
#4488769 - 08/14/17 09:23 PM Re: abs not working correctly 97 explorer 4wd [Re: rollinpete]
Ethan1 Offline


Registered: 12/29/14
Posts: 1632
Loc: 'murica
Does it have drums or discs in the rear?

Top
#4488779 - 08/14/17 09:42 PM Re: abs not working correctly 97 explorer 4wd [Re: rollinpete]
justintendo Offline


Registered: 03/04/17
Posts: 101
Loc: northwest pa
the above posters are correct..one of the speed sensors are dropping out right before you come to a stop, making the abs module think a wheel is locking up.
_________________________
2013 escape 2.0 awd
2008 fusion 2.3 mtx
1996 f150 4.9 2wd mtx
1999 kaw zrx 1100
many husqvarnas

Top
#4488828 - 08/14/17 11:15 PM Re: abs not working correctly 97 explorer 4wd [Re: Ethan1]
bdcardinal Offline


Registered: 06/03/05
Posts: 10992
Loc: Santa Barbara, CA
Originally Posted By: Ethan1
Does it have drums or discs in the rear?


I am 99% sure those were all rear disc, the only shoes were for parking brakes.
_________________________
2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Benefactor Member
Opinions expressed are my own.

Top
#4488848 - 08/14/17 11:38 PM Re: abs not working correctly 97 explorer 4wd [Re: rollinpete]
rollinpete Offline


Registered: 03/20/17
Posts: 453
Loc: West Ma.
Your right ,It does have rear disc brakes, shoes for parking...you guys are probably right one of the front sensors is probably messed up but witch one...the bearings are still okay no noise or movement, I dont want to throw parts at it $ , I dont have a scan tool for abs, just have a cheap code reader...whats a good and cheap scan tool that would do the job...Seems like the older I get the more I need speciallty tools and the less i'll use them afterwards... ???
_________________________
Pete.
97 Ford Expl.Sport 4.0 ohv 4wd 5spddrive183k miles
Last Change;
Penn. Plat. HM 5w30
Fram xg8a, Fram CA8141

(Oil) Where would we be with out it.


Top
#4488874 - 08/15/17 12:26 AM Re: abs not working correctly 97 explorer 4wd [Re: rollinpete]
punisher Offline


Registered: 09/11/04
Posts: 2425
Loc: snowblind in TX
Disconnect the wheel sensor connector. DVOM across the sensor's pins. Ohm sensor...record it.
Set DVOM to voltage....spin wheel...record voltage. Lowest voltage of the two....not good.
Set DVOM to Hz......spin wheel...record Hz. Look for drop outs or fluctuation.

Having a scan tool with ABS PIDS is great. You can see what the ABS module sees, but you have to make due with what you got. Don't know why there is no code.

Since you have a hard fault, I wouldn't waste time checking the tone rings.....unless you actually have a damaged sensor. On second thought, check your tone rings. If they are cast, check for tiny cracks at the base of the teeth, stamped-check for a bent section. Nothing worse than throwing on a new sensor, and then finding out in addition to a bad sensor the tone ring is cracked/bent.

Top
#4488875 - 08/15/17 12:28 AM Re: abs not working correctly 97 explorer 4wd [Re: rollinpete]
michaelluscher Offline


Registered: 10/07/12
Posts: 2420
Loc: Staten Island, NY
Originally Posted By: rollinpete
Your right ,It does have rear disc brakes, shoes for parking...you guys are probably right one of the front sensors is probably messed up but witch one...the bearings are still okay no noise or movement, I dont want to throw parts at it $ , I dont have a scan tool for abs, just have a cheap code reader...whats a good and cheap scan tool that would do the job...Seems like the older I get the more I need speciallty tools and the less i'll use them afterwards... ???


Are you familiar with FORScan?

http://forscan.org/home.html

Have a second person drive while you watch a data list of all ABS pids

You should see your problem, if it's ABS related
_________________________
'06 Toyota Camry SE V6 3MZ-FE 100k
'01 Mercury Villager Estate VG33E 52k
'06 Ford Taurus SE Vulcan 60k
'13 Chrysler 300 3.6 Pentastar 230k

Top
#4488876 - 08/15/17 12:29 AM Re: abs not working correctly 97 explorer 4wd [Re: rollinpete]
MNgopher Offline


Registered: 09/17/02
Posts: 4042
Loc: Lakeville, MN
Had the same symptoms on an '03 F150 - and it was a bad front wheel speed sensor. You will need a scanner that can tell you which channel is flakey. It won't set an ABS code.

And my '97 Explorer was rear discs with parking brake drum setup.

Top
#4488892 - 08/15/17 01:27 AM Re: abs not working correctly 97 explorer 4wd [Re: rollinpete]
Black_Thunder Offline


Registered: 09/23/06
Posts: 1285
Loc: Wisconsin
the front wheel bearings are probably on their way out. its bearing/hub unit with the sensor included.

my 98 was doing the same thing but AWD i took the hubs off and you could barely turn the bearings by hand.

turns out once the bearings start to go the metal shavings go into the grease causing the sensor not to read the tone wheel very well and thats why the abs does screwy things without hitting the brake hard or locking up the wheels it would kick on.
_________________________
I'd buy Callahan autoparts if I could.

Top