Question about 1995 Pontiac Bonneville
The power steering started to make a whining noise, i checked the fluid level and it was low. I topped off the fluid and the power steering stopped working all together. I replaced the power steering pump and when I fill it to the line it stops working. I took the pump back to the store and they replaced it with another one. this one does the same thing. I have flushed the system as it recommends in the instructions, replaced the lines, and since then I have found the potato valve in the pump is sticking. it seems like it works until after the engine gets hot and this is when it stops working. I drain all the fluid and start over it works until I fill it all the way. this has become an expensive problem.
i don't know why they make it so hard to find, but this diagram i found helps a lot! i searched for a long time and finally saw this online, hope it helps! http://www.bonnevilleforum.com/t213271/
Posted on Dec 21, 2008
The run rough problem is due a cyl.mis firing,it becaused buy a bad plug,plug wire,coil,or even the ing.module. the servive eng.light flashing is warning you that you have a cyl.misfire that can cause damaget to your catltic converter if you continue to drive it.with may lead to why you think you have a exhaust problem,it may be colgged.
Posted on Dec 27, 2008
it could still be the pump is it making a whining noise,and does the fluid smell really burnt.jack the car up and put it on jack stands set the e-brake and chock the rear tires so it can not roll,then start the car and see if there is any binding the the steering rack if there is you will notice a small jump to the rack as the wheel is turned,or a shifting on the mounting bolts that hold the rack to the cross member.If the car goes down the road fine with out a bunch of shacking or wobbling then I think I would replace the pump and have the system thoroughly flushed.I hope this helps
Posted on Jan 04, 2010
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If power steering fluid level is full and whine noise happens after engine and trans is warm and been driven for a while it could be a trans problem. This make and model trans is noted for having a sticking EPC(electronic pressure control) solenoid inside the trans. The trans controller detects an internal trans slip and starts jacking up line pressure which makes the trans pump whine, it sounds just like a power steering pump. When this happens it will also start shifting gears very hard. Take vehicle to a trans shop and have them check it, there will most likely be a code P1811-long shift, max. adapt met. This code means the controller has seen an internal trans component slipping and has jacked up the line pressure to the max position and the slip is still present. Unfortunately this is not a repair that can be completed at home as the trans needs to come out and apart.
Hope this helps.
Posted on Mar 11, 2010
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a few things will cause this to happen your power steering pump could be going out, the belt could
have stretched, this will happen with old age, make sure the belt is not brittle or has any cracks. the
belt could be slipping, or the belt tensioner may need to be replaced. one trick that i have learned and
i will pass it on to you. 1st disconnect the negative side of the battery. take a hard bar of soap any
cheap brand and rub it on the belt. if the belt has any cracks the soap will remove any noise if in fact
it is the belt. reconnect your negative. start your car. if the noise goes away just replace the belt.
Posted on Feb 26, 2011
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