Prius (2004-09) :: Vacuum Pump Running Constantly And Rattling?
Jun 8, 2012
I had the doors open while unloading the car this morning and noticed that the brake booster pump just kept running and running and running, plus I can hear a strange, hollow rattling sound somewhere under the car that coincides with the pump. When I say it runs "constantly," I really mean that it runs for 10 seconds (with the rattle), stops for about 5 seconds (silence), runs and rattles for ten seconds again, stops for another five, and just keeps on going for as long as I care to sit there with the door open.
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My vacuum pump I noticed is running constantly and also my vents are stuck on defrost.
I narrowed it down by taking off the lines going from the tank to the 4x4 solenoid and the tank to the HVAC line. If I plug both lines I get pressure to both but it still won't shut the pump off. Why won't the pump shut off? Leaky tank?
If I plug the red line back into the solenoid I cannot get pressure to come out of the HVAC line. (Switch in cab set in 2wd)
I can make the pump shut off by plugging the main inlet to the pump.
I took the tank out and can't find any cracks or leaks. Could something inside the tank be broke?
Also why can't I get pressure when the red line is plugged into the selinoid?
I can't figure it out. Almost seems like the 4x4 solenoid and the tank are both the problem.
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I have a 2004 F-350 diesel. My vent selector is always on defrost so I suspected a broken hose but traced all out and all seem to be fine. I disconnected the line coming from the pump to the tank and no vacuum. The pump doesn't seem to be running but it's hard to tell with the engine noise and vibration. What tells the pump to run and how can I bench check it?
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Where the vacuum (brake) pump is located in the engine bay?
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Hopped in the car this morning and found the front wipers running intermittently (every 5 sec) no matter what setting is selected--they can't be shut off.
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The water pump on my 04 with 132k miles is rattling / wobbling (but surprisingly, not leaking). So I am going to replace the water pump, serpentine belt, and thermostat. The idler pulley seemed fine so I am wondering if I should replace it. What is the failure mode on the idler pulley and how will I know it is going bad without having to check it? Or should I just go ahead and replace it?
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Ok, I know I have a vaccum leak. I have manual hubs now and those lines are capped. The AC is blowing through the deforst and the pump is running non stop. I have replaced the vac pump a couple of years ago and it worked fine then. any other places to look?
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My wife calls me yesterday and said she could hear a rattling noise from the engine area, but no other issues presented themselves. Later, I checked the engine compartment for the noise with the engine on and found that the noise was coming from the area of the engine water pump/idler pulley but i couldn't really narrow it much closer. The noise honestly sounds like bearings about to go out. I did see that behind the water pump pulley there was a small buildup of corrosion on the water pump, but no apparent leaks or wetness. The car has the original water pump and idler pulley with 140k. I plan on replacing the water pump, idler pulley and thermostat in the morning. Or is this overkill? I don't want to lose the engine nor do I want my wife to get stranded anywhere.
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I have a 2008 F350 FX4 with the 6.4l diesel, a couple weeks ago I was reprogramming the ecm and noticed the vacuum pump was running and wouldn't stop, so after a bunch of reading and testing i changed the solenoid vacuum valve. I tested all the vacuum lines and found no leaks.
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I have a 2005 F250 , 4.2 tdi diesel. I just bought the truck recently and still getting to know it.
I noticed recently that when I turn on the key, the vacuum pump starts running and does not go off. It seems to run continuously and will only shut off if I block the white outlet pipe with my finger. Is this normal or is the pump stuffed.
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Toyota dealer said computer indicated the water pump and belt needed replacing. We decided to do the replacement ourself. Now the light comes on which indicates car is running hot. We did replace the coolant. The 2005 Toyota Prius never ran hot before the replacement, What did we do wrong?
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During the last week, or slightly less I suddenly started hearing the brake boost pump running much more frequently than normal in my 2008 and is also producing a "knocking" noise along with its run noise which increases in frequency as the pump speed increases. No problems with the engine coolant pump for the thermos, and the inverter pump was replaced yesterday along with a replaced "bolt" in the steering column for the recall.
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On our 2008 Prius, while the brake assist pump is running I get a steady thump-thump-thump-thump noise, as shown in the video below. If you put your foot on the brake the noise stops. The brakes operate fine and there are no warning lights on. What this might be? It's coming from the passenger side of the car, and oddly it's loudest under the car near the back seat. 86,000 miles on the car.
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I can usually find what Im looking for with a quick search but I have had no luck with this issue.
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It showed up yesterday and I looked it up that it's the Secondary Air Injection System Switching valve stuck open. I cleared the code but this morning I heard the pump vacuum noise, which I have never heard before but the code didn't come back on. [URL] .....
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I have a 2004 E350 6.0 with a bad vacuum pump. I tried looking on Youtube for a video on replacing the pump but no luck. Looking for a video or instructions on replacing the pump? It looks fairly easy but you need to be a snake to gain access to the pump bolts.
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Some years back my "farm" '05 prius when a host of bells and whistles went off, cooling fan ran more than normal, and I lost power a couple of times. Turned out this farm prius had an accumulation of dirt, dog hair, hay and other debris that needed to be cleaned out. You got me through the whole process, and the car's run fine until.... . Fast forward a couple of years to 200,003 miles. Now the cooling fan is running pretty constantly, the red triangle stays lit, the check engine light comes on, the (!) is on, and the VSC light is on. Haven't hooked it up to check codes, but did check cooling fan and it's clean. Would it possibly possibly better to change the 12 volt battery?
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My 04 PS was blowin white smoke constantly while running. I just towed a uHaul from Connecticut to Virginia Beach and had some coolant issues on the drive down (I was out of coolant on 95 in PA, added coolant and it made the rest of the drive no problem). I got here to Virginia and it was low on coolant again. I added coolant to it, and now I have some other issues. I had what looked like oil comin out the stacks onto the bed, so I pulled the turbo thinking it was seals. But the turbo was just rebuilt prior to me buying it with a wicked wheel in it. It still had stock EGR and it has 202K on it.
Checked and found EGR valve was wet. Ordered an EGR delete kit, and just finished installing it. Now with everything put back together, the truck doesn't want to start. It cranks but doesn't fire. I pulled the codes from my tuner and I got: P0403, P0405, P0683, and P2623. I know P0403 and P0405 are related to EGR but the others I'm at a loss on. The EGR delete kit I bought included the blank to remove the valve but what do I do with the plug that used to plug into it? Any way forward to get the truck back up and runnin again? This is my daily driver and not lookin to break the bank to get it goin again but I really need her to be reliable.
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My air conditioning constantly blows out warm air - even if I set it to the lowest temperature ("LO").
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My 2005 Prius, 88K miles, has developed an odd quirk. For about a month, the AC will not retain the last temperature setting. For example, you drive the car, set the temperature to max cold, arrive at your destination, turn the car off and when you start it again the temperature has reset to 75 degrees. Never used to do this before. I'm hoping it is just a module of some sort and not a major AC repair.
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Out of the blue the main screen started to flash. "Synergy hybrid drive" logo shows up, then screen goes off (every 1-2 seconds). I've searched prius chat/google and could not find any useful info.
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