ABS light on, Speedo quit and running issue

[Supermini]

Here's the sitiation: drove home from work, running perfect, got home parked it for bout half an hour and went to leave to a friends house. Leaving the house, I noticed my speedometer/odometer quit, ABS dash light on, and way more engine braking than normal... I have an auto meter vac gauge on the truck and it's reading about 2 psi more vac than normal with my foot off the pedal slowing down from about 4000 rpm in all gears. All these problems happened at once. I am completely boggled... i can relate the speedo and ABS due to the fact that MAYBE the speedo reads the rotations off the tone ring for the ABS in the rear axle BUT i could still be wrong about that. And i have no clue about how the ABS system could possibly cause this weird running issue, like how the hell could that system do anything to change my throttle opening(through the IACV i'm guessing but still WTF?)

I've checked all the obvious things (obvious to me at least), all other gauges read normal, no voltage issues nothin. I reflashed the computer with my programmer and no change, unhooked the battery for a couple hours hoping for some magic crap to happen and nothing again. Any help would be greatly appreciated!!!!!!

truck is a 2000 3.0 2wd w/5 spd

 

[fixizin]

Do you have 4-wheel ABS or just rear?

I have just rear, and when my ABS sensor went out in the rear diff, it only killed the speedo and odo... I don't have a vac gauge, but nothing else seemed affected. Then again I didn't drive it that much before I popped in a new one.

All the parts stores tried to sell me a mechanically-driven sensor with a long spindle, but my 8.8 diff takes the stubby magnetic (Hall-effect) speed sensor.

See if your sensor looks like this:
http://www.partsamerica.com:80/prod...MfrPartNumber=ABS530780&PartType=1061&PTSet=A
... and let us know how she goes.

 

[Earl43P]

VSS for sure.

If you never noticed, your idle would drop from ~1100 to ~800 just as you came to a stop. The PCM "props up" the idle while rolling to aid with smoother shifts (manual trans). Now that the speed signal (VSS) is gone, the PCM is droppping the idle as if you were almost stopped, making you feel the increased engine braking.

VSS is a < $20 part, held in the axle pumpkin (top) with a single bolt.

 

[fixizin]

What Earl said. Yep, one bolt, one plug, WAY easier than an old-school mechanical speedo cable.

You can spend more, but the Raybestos one has been working fine for me for over a year now... $12 at Parts America:

http://www.partsamerica.com/product...MfrPartNumber=ABS530780&PartType=1061&PTSet=A

Thinking back, I probably didn't notice the idle/engine braking change 'cause my IAC had been flaking intermittently, to the point where heel-toeing when slowing to a stop had become 2nd nature... finally replaced that too.

 

[slowblack96]

yep 8mm socket and disconnect the wire. dont even need to raise it.

 

[Supermini]

Rock on Guys good call. 10.95 plus tax from my parts guys and everything's perfect. Thanks for the help. And as for Slowblack96's post, It's dropped 3" in the rear so i did have to raise it cuz i couldn't fit under the truck otherwise haha. Thanks again guys!!