Passat (B5) :: 2000 - Brakes Not Releasing - Power Loss To Re-accelerate Due To Continued Braking?
Jul 16, 2010
It's a UK VW Passat year 2000 with 1.8i longitudinal engine layout. Car has ABS
I discovered that the brakes are not releasing quickly after application. Examples where this has been noticed:
When braking and accelerating at the same time to dry brakes after puddles. Noticeable lack of power to re-accelerate when you release the brake pedal, presumably due to continued braking. Noticeable continuation of braking when trailbraking into a corner (ok sometimes I'm a bit of a racer in a family car).
What concerns me is when the snow, ice or heavy rain comes back that I might find sudden instability if the brakes aren't releasing after slowing for a corner or that worse still I'm destined for total brake servo failure.
There are no ABS related error codes although in the ice and snow I did find that the ABS fired until the pedal raised stiff and all 4 wheels just locked up (that was a fun junction crossing).
I have noticed that the drainage ducts in the bulkhead are blocked but I've never had water enter the car so I don't think it's water in the brake servo although this could have happened prior to me owning it I guess.
Working theories:
Due to slave cylinder corrosion and calipers are releasing slowly
Due to brake servo fault - either water ingress of vacuum leak
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Experienced an almost unsafe loss of stopping power when backing up after a cold start? Every morning when I back down the driveway in reverse, by about the third pump of my brakes the pedal effort increases, the pedal becomes very hard (like when you pump the pedal when the car is off) and I have a hard time bringing the car to a stop to put it in drive. I need to take it in to have this looked at...
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Ever since I took my 18" wheels off for the winter and put the stock VW 16's with snow tires I have on multiple occasions almost rear ended the car in front of me when I experienced what seemed like a loss of brake pressure. The brake pedal did not feel spongy or anything but often in this situation the abs brakes seem to kick in for no reason. I feel a slight pulsation in the brake pedal which I can only assume is an activation of abs. I'm wondering if this slight pulsation (1 second duration ) is causing my brakes to be less effective. The pavement has been completely dry and I was not traveling fast enough, nor pressing the brakes hard enough to cause the tires to lock and trip the abs.
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I pulled the EGR yesterday, all good, although a tad dirty. Cleaned up no problem. Haven't had a chance to do a bubble test yet. There are some DTCs, but I can't remember off the top of my head what they were. I'm about to go clean the inside of the truck, so I will pull those and update in a few minutes.
Truck has about 148,500 miles.
Torque Pro lists these codes: C1145, P0299, P0677
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The other day I went to turn off my vehicle and it continued running even when key is in off position. I took the key out and it still continued running. I had to disconnect the battery and turn key in on position for vehicle to stall. I do not want to buy any unnecessary parts nor do I want to take apart any unnecessary components.
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Car is 2012 Santa Fe w/ less than 6,000 miles on it.
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The past couple days when driving to school in the morning i've been noticing that my car starts to rattle and struggles to accelerate once I pull out of my driveway. Once i get to the next stop sign to take off the car runs fine like nothing ever happened. My check engine light doesn't come on though. I usually let the car sit for about 30 seconds to a minute before i start to move the car. Mods I have are Unitronic stage 2, Forge 007p DV with yellow spring, and 3" downpipe.
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This car has turned into a bad dream. When it first starts in runs well for a mile or so until it warms all the way up. Then it goes into starvation mode and won't accelerate. Maybe a cough or two then it runs fine for 10 or so seconds. And goes back to stumbling. Most times I have to pull over out of traffic and wait for it to so call catch again.
I have changed plugs, wires, coil rack & fuel pump module. Because someone else looked at it before I did, they erased stored codes. I have pulled 2 codes on 2 different occasions. The first was P0134 the second was P1166. Other times no codes were stored. I did notice that if I shut off ignition & restart it runs great for 10 or 15 seconds.
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My 2004 Elantra occasionally won't start. When I hold the ignition on Start, the radio loses power (but the dashboard doesn't) and nothing else happens. Sometimes, tapping the gas pedal will suddenly cause the car to start. Once, I had to stomp the pedal to the floor before it would work.
I just replaced the battery (and positive cable end since it was corroded in place) and recently replaced the spark plugs (which were badly burnt). There is a check engine code for "catalyst underperforming" which seems unrelated.
I suspect my car has fuel delivery problems. It occasionally sputters while idling and often has power loss while driving if I try to accelerate hard. It seems to have trouble shifting into 4th gear from 3rd or 5th, but that may be another issue entirely.
What I should check to diagnose this, or replace to resolve it?
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Friend's vehicle. OBD-II codes indicate Intake Valve Timing Control Bank1 and Bank2. Vehicle drives OK most of the time, but then has lapses of lost power where you step on the gas and the vehicle doesn't accelerate accordingly. RPMs rise, but tranny doesn't seem to shift at the right time. Overdrive button OFF doesn't seem to have any affect. Codes have been erased and returned the next day.
Is this Camshaft-related, as in Camshaft Position sensor? I had this issue with my '97 Taurus, but in that case it threw the code explicitly for the CMP sensor.
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Well today I was happy go lucky on my way to work everything was going fine then all of a sudden this car in front of me slows down. Okay then I go to speed back up and my car was still crunk but I lose power I could not accelerate at all. So I had to coast to the side of the road and I put the car in park to see if it will allow me to accelerate in a different gear and when I do that.
The car shuts off then I go to crank it back up the first time and I got nothing then I wait a couple of seconds then try it again. It cranks up but still cant accelerate until I raise the engine then I can finally move. I was able to do about 65 mph to get to work but this happened two more times before I got back home that night. The car is a 2000 and has 220,000 miles on it.
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It's been quite a while since I was here - which shows that my Passat has been pretty reliable recently. But now I have a problem. WHen I was driving home about a week ago, I saw the temperature suddenly drop all the way to the stop. I put on the heater, and the air continued to come out at regular temperature, so the problem was in the reading/display. I have a Scangauge, which I connected, and it showed the correct temperature (around 190), confirming a problem with the display.
I contacted the dealer, who first insisted that it must be the thermostat (then why do I get a reading of 190 with the Scan Gauge and why is the heater still hot). When I disagreed, they said it must be the sensor. When I pointed out that the Scan Gauge correctly shows the rise in temperature for cold and then show the temperature maintained at between about 185 and 195) , then they said it must be the gauge, which requires a new instrument cluster.
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I have a 2005 Dodge Caravan, modified for use for someone in a wheelchair. On two occasions now I have been driving and have lost ALL power, including all dashboard lights, signals, power steering and power brakes. Luckily both times I was able to pull over without much problem (aside from problems steering and having to mash really hard on the brakes). Turned off the motor, restarted, and everything seemed fine. The first time this happened I took it to my mechanic who said he was unable to duplicate the problem. The second time this happened (yesterday) was after a severe rainstorm. I can't remember what the weather was like the first time it happened.
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I use a bottle hanging like an I.V. drip to flush the Brake Fluid in all my cars. I can pump all the old fluid out, as well as the air. My Superduty 7.3 has a good solid brake pedal after the flush. It seems to me the rear brakes handle 60% of the stopping load. Its been like this for so long I'm not sure if it's ever been different. i then go to a gravel or wet road and test the rear abs, and it seems o work, but definitely has a squirrely feel. I did some strong pavement stops with speed, and it stops, no skidding. Is that the way it should be?
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