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Car Forum / Pontiac / Pontiac Cars / July 200894 GTP, 3.4 no rear brake pressure
intermittant problem, stays for months goes away for weeks.Abs and chec 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 an rear brake line going to it and the front brakes work fine. Any idea's on where to start.......th - Message posted using http://www.talkaboutautos.com/group/alt.autos.pontiac More information at http://www.talkaboutautos.com/faq.htm If you scan the abs with an abs function scanner may be able to pin down the source of the problem. > intermittant problem, stays for months goes away for weeks.Abs and check > engine comes light on. [quoted text clipped - 8 lines] > http://www.talkaboutautos.com/group/alt.autos.pontiac/ > More information at http://www.talkaboutautos.com/faq.html ----== Posted via Pronews.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.pronews.com The #1 Newsgroup Service in the World! >100,000 Newsgroups ---= - Total Privacy via Encryption =--- would you know of a scanner type , i just looked at a bunch and they won read my car (cheaper units). i might have to find someone with a high end model . - Message posted using http://www.talkaboutautos.com/group/alt.autos.pontiac More information at http://www.talkaboutautos.com/faq.htm > would you know of a scanner type , i just looked at a bunch and they wont > read my car (cheaper units). [quoted text clipped - 3 lines] > Message posted using http://www.talkaboutautos.com/group/alt.autos.pontiac/ > More information at http://www.talkaboutautos.com/faq.html Actron CP9449 BrakeScan Diagnostic Scanner Nope, just looked it up . Works on 96 and newer (the model i found ) thanks though.. - Message posted using http://www.talkaboutautos.com/group/alt.autos.pontiac More information at http://www.talkaboutautos.com/faq.htm I would pay some shop to do this for you, I have a Snap On MTG 2500 with the abs cartridge, 3,600.00 set up!! > Nope, just looked it up . > Works on 96 and newer (the model i found ) [quoted text clipped - 4 lines] > http://www.talkaboutautos.com/group/alt.autos.pontiac/ > More information at http://www.talkaboutautos.com/faq.html ----== Posted via Pronews.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.pronews.com 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 get to a scantool. I am wondering if this will show up as a code again thanks for your help... - Message posted using http://www.talkaboutautos.com/group/alt.autos.pontiac More information at http://www.talkaboutautos.com/faq.htm In article <93f420713a3c2c0904695c16cf78893a@localhost.talkaboutautos.com>, > 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.... 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. >In article ><93f420713a3c2c0904695c16cf78893a@localhost.talkaboutautos.com>, [quoted text clipped - 8 lines] >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 http://www.teranews.com ** 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 ca and do this repair on the bench..........................thanx - Message posted using http://www.talkaboutautos.com/group/alt.autos.pontiac More information at http://www.talkaboutautos.com/faq.htm >Thanks Clare, what you describe sounds quite likely. >I just found a TSB that describes this completely, [quoted text clipped - 4 lines] >I am assuming that you have to pull the ABS/master cylinder out of the car >and do this repair on the bench..........................thanx 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 http://www.teranews.com ** In article <62bc0d2cf4014fc7763991914e7d7f98@localhost.talkaboutautos.com>, > Thanks Clare, what you describe sounds quite likely. Clare didn't offer that, I did. > I just found a TSB that describes this completely, > would you know how to relieve the brake pressure > without a scantool ? Why would you want to? > 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 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. Would anyone have an idea of the cause of this problem and repair, while get to a scantool. I am wondering if this will show up as a code again thanks for your help... - Message posted using http://www.talkaboutautos.com/group/alt.autos.pontiac More information at http://www.talkaboutautos.com/faq.htm There may be a stored abs code relating to the brake isssue. > Would anyone have an idea of the cause of this problem and repair, while > i [quoted text clipped - 6 lines] > http://www.talkaboutautos.com/group/alt.autos.pontiac/ > More information at http://www.talkaboutautos.com/faq.html ----== Posted via Pronews.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.pronews.com The #1 Newsgroup Service in the World! >100,000 Newsgroups ---= - Total Privacy via Encryption =--- 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 th car and do this repair on the bench..........................than - Message posted using http://www.talkaboutautos.com/group/alt.autos.pontiac More information at http://www.talkaboutautos.com/faq.htm |
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