Mechanics

PONTIAC MONTANA ABS PROBLEM

1999 Pontiac Montana • 180,000 miles

1st real cold morning, started van, heard whining sound(I thought maybe pwrsteering or altn)it would get louder with acceleration, did this for 3 days, 4th day(cold morning) started van, heard some kind of ticking sound from front right wheel well. Few miles down road, abs and tcs light came on and it felt like I lost acceleration power, barely made it up hill to my house. Parked, hours later restarted(when it was warmer), no abs or tcs light. Still had whining sound but now had burning smell coming from next to battery/fuse box(I think from a hole in frame leading down to front right wheel well area). Changed front pads that day(old ones were trashed). Checked shoes, replaced rear right wheel cylinder(old was leaking). Bleeded brakes. Started van, could still smell burning, and hear sound{not as loud)no abs, tcs lights though, but engine light came on (showed P0341 Cam Sensor). Drove several miles, sill no lights, started to brake for red light, then, abs, tcs, & brake light came on, seconds later, all dash lights came on and start blinking, lost acceleration power and van starts sputerring on and off for about a1/4 mile, then it died. Tried to restart, battery was dead, someone boosted me, drove maybe a mile, it died again, battery dead, (battery is less than 2 weeks old)Had to it tow home. Looked at ABS wire on rt frnt hub, no burn. What do you think it could be? What can I check?
Avatar
Mik4rd
December 7, 2012.




As far as the noise, remove the belt to see if the sound goes away, (NOTE: Only run it for a few seconds to see if the sound is gone) If the sound is gone, check all belt driven accessories to determine if there is one with a bad bearing.


I agree with removing the belt and see if noise is gone, if so shut off engine and spin each pulley by hand to listen for noise or feel the roughness. And as far as the other issue I would first verify the charging voltage of the alternator.
AD


Homer1967
Dec 7, 2012.
I'll do that, I tightened the tensionor pulley because it was a little loose. I still had noise, so I tried to pinpoint the sound by ear, and It seemed to come from the top of the engine at the altn/pwr steering area, but they are so close together it was hard to tell for sure. If the alternator is not producing enough, would that make the abs/tcs light come on? I read somewhere that the power for alt runs thru a relay at the starter, possibly a in line fuse. Is that true?Oh yeah, will the cam sensor code p0341 be related to the alternator. Thanks for the quick reply, I've got to get this van running asap to take kids to school.


Tiny
Mik4rd
Dec 7, 2012.
You are welcome. Let us know


Homer1967
Dec 10, 2012.
Hey guys. Yesterday I pulled the drive belt and started the car for a minute. There was no sound with belt off, which seemed to point to a belt driven accessory. I already thought it might be the alternator or pwr steer. Put belt back on and sound came back. I ran a test on the alt. My battery was reading 12V, I started the car and ave some gas and it went up to 14V. So it appeared to be charging. I let the van idle for about 15 min and the sound started to get louder and the burning smell started. I tested voltage again, the battery would not go above 12V when you gave it gas. When it was first started, it was jumping up to 14V when I pressed the gas. Also, I took a long funnel and put the end of it on the alternator and put my ear to the other, and the whining sound is definitely from the alternator. The burning smell was also coming from the alternator. Should I go ahead and replace the alternator? Would a bad alternator make the abs/tcs lights come on for any reason? The worst thing is that while checking the drive belt I noticed the crankshaft pulley has a pretty good wobble while spinning. It's always something! Lol! Thanks for all your help.


Tiny
Mik4rd
Dec 10, 2012.
Yes replace the alt. And yes the abs system and the traction control system are very sensitive to voltage changes, it is very common for abs and tc lights to illuminate with a low voltage issue. Could even be related to the cam code. Low voltage on today's computer controlled cars can wreak havoc on the electrical system.


Homer1967
Dec 10, 2012.

AD