94 GTP, 3.4 no rear brake pressure

Jul 15, 2008 14 Replies

intermittant problem, stays for months goes away for weeks.Abs and check engine comes light on. When working rear calipers and pressure seem fine. Thought it was one of the two solenoids on the abs valve(sticking)but after looking at valve, each solenoid has a front and rear brake line going to it and the front brakes work fine. Any idea's on where to start.......thx


-- Message posted using

formatting link
information at
formatting link



would you know of a scanner type , i just looked at a bunch and they wont read my car (cheaper units). i might have to find someone with a high end model .

-- Message posted using

formatting link
information at
formatting link

----== Posted via Pronews.Com - Unlimited-Unrestricted-Secure Usenet News==----

formatting link
The #1 Newsgroup Service in the World! >100,000 Newsgroups---= - Total Privacy via Encryption =---

Actron CP9449 BrakeScan Diagnostic Scanner

Nope, just looked it up . Works on 96 and newer (the model i found ) thanks though...

-- Message posted using

formatting link
information at
formatting link

----== Posted via Pronews.Com - Unlimited-Unrestricted-Secure Usenet News==----

formatting link
The #1 Newsgroup Service in the World! >100,000 Newsgroups---= - Total Privacy via Encryption =---

Would anyone have an idea of the cause of this problem and repair, while i get to a scantool. I am wondering if this will show up as a code again thanks for your help....

-- Message posted using

formatting link
information at
formatting link

Would anyone have an idea of the cause of this problem and repair, while i get to a scantool. I am wondering if this will show up as a code again thanks for your help....

-- Message posted using

formatting link
information at
formatting link

----== Posted via Pronews.Com - Unlimited-Unrestricted-Secure Usenet News==----

formatting link
The #1 Newsgroup Service in the World! >100,000 Newsgroups---= - Total Privacy via Encryption =---

Have you taken the black plastic cover off of the bottom of the hydraulic modulator? One of the gears inside may have come loose. Be careful, don't lose the gear and screw.

Happened to my '94 Trans Sport.

** Posted from
formatting link
**

Thanks Clare, what you describe sounds quite likely. I just found a TSB that describes this completely, would you know how to relieve the brake pressure without a scantool ? I thought i had read that pumping the brakes about

50 times, ignition off/engine off will do it but i am not sure. I am assuming that you have to pull the ABS/master cylinder out of the car and do this repair on the bench..........................thanx

-- Message posted using

formatting link
information at
formatting link

I just loosened the lines and removed the master cyl ass'y - figured I had to replace it - and heard a rattle when I turned it over on the bench. So I pulled it apart and fixed it.

** Posted from
formatting link
**

Clare didn't offer that, I did.

Why would you want to?

On the bench? WTF? There is an abundance of room to get the cover off, why make it any more complicated than merely removing the cover? I've repaired dozens and dozens of these and never once needed to remove the ABS modulator to do so.

what you describe sounds quite likely. I just found a TSB that describes this completely, would you know how to relieve the brake pressure without a scantool ? I thought i had read that pumping the brakes about

50 times, ignition off/engine off will do it but i am not sure. I am assuming that you have to pull the ABS/master cylinder out of the car and do this repair on the bench..........................thanx

-- Message posted using

formatting link
information at
formatting link

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required