Passat (B5) :: 1999 1.8t - Power Is Kicking In And Out When AC Turned On
Jun 1, 2013
A couple of times since the weather has warmed up, a strange situation occurred with this car.
Turn on the a/c...interior cools off normally. After a while being on though...presumably when the motor is nice and hot...the engine starts acting weird. The temp gauge is right where its supposed to be, but here's the symptoms.
Press the throttle to speed up..and the motor slows down stumbles real bad. let up and it returns to pretty normal idle. if you floor it to get past the 'stumble zone' mostly it works right, but it feels like power is kicking in and out, to the point where you want to pull over because you're not sure if the car is safe to drive.
I'm talking stumble like the motor is about to kill. like its ignoring the input to open the throttle. This car has the hard wired throttle cable, so it can't be anything with an electronic throttle. If we drive around and never turn on the a/c....the symptoms do not occur.
What to check for this? No check engine lights on other than the typical abs lights.
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I just got this project running recently (replaced head after timing belt failure) and on the first night I got it running I noticed the electric fan was not kicking in (belt driven fan works fine). Investigated a bit and found the fan was some what seized. I was able to work it free quite easily so I chalked it up to corrosion from sitting.
fired it back up and let her get to operating temp and once again no fan. checked and it spins freely but never comes on. I did some checking and I (visually) cant find the plug, fan switch, or any fuses that deal with it... So I checked the bentley and it talks about a couple relays that have to do with it, but no fuses (at least that Ive found so far). Before I start tearing into wiring diagrams in the back of the bentley, I'm hoping some of y'all might have some input for me. Maybe some common faults, where to look, etc...
Car is a 2000 Passat 1.8T auto. Just had the head swapped due to TB failure which included waterpump, thermostat, fresh coolant, and all new belts.
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I cannot go hard on the car bc no matter what gear i am in the rev limiter kicks in at 5000 rpm. it kicks the car back so hard that I am afraid to keep trying and testing it. it seems like every time i fix something, something else goes wrong.
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So i looked inside the car, and when i turn the key to the battery spot, PRNDetc. doesn't show up on the dash. I also noticed that i can push it backwards in drive.
I have had the transmission replaced recently, and i took it to a couple places and they tried to tell me that my engine was seized. I tend not to think so, because it there was something wrong with the transmission, the engine wouldn't turn over since it is connected to the transmission.
It is a tiptronic transmission. By any chance do you think it could be the transmission circuit board under the shifter? or a fuse, or some kind of linkage in the transmission that is messed up? Possibly the flywheel?
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I tried using a car starter/charger and charged it up for 3 hours - was reading a positive charge on the gauge- but it won't start. When I get ready to crank the car with the charger attached to it, the fan noise kicks in again but it isn't coming from the radiator fan- it sounds like it is coming from under the air intake for the air filter.
When I attempt to start the car,I can best describe the sound as a machine gun like cranking noise that lasts as long as I turn the key. I am hoping it isn't the starter. The battery is less than 2 years old with about 10k miles on it.
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Bought a 2014 SD 4x4 in December of 2013 and this is the second time the big girl has been to the shop with A/C problems. First time it was the evaporator about three or four months ago. During the last few weeks of the summer I began to smell something strange (like band-aids) when the A/C was on and it lingered until the next re-entry. ALso, began to hear a slight hissing noise when the compressor was kicking in and out. They replaced the evaporator, smell remained as they said it was the refrigerant I was smelling. About two or three weeks ago the smell got slightly "larger", and last weekend she would not cool. This is the fourth time shes been to the shop with other problems such as the My Touch system..............
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I have a 1999 7.3 super duty that won't crank when the key is turned. All lights work, power windows and mirrors work but after the WTS light goes out... Nothing...now I do have a slight leak in the roof and a little water does get in the cab. I opened my door the other day and it smelled like an electrical fire had occurred. I checked under the hood and the same smell, if not a little stronger. I pulled my fuse box and GEM tonight. Once I got away from the truck, I expected them to smell like the electrical fire smell, but they didn't. Now I did try cranking the engine over by jumping the starter relay before tearing the fuse panel out, and I got it to crank, but not strong at all. The batteries are good.
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So the first issue is, if the vehicle is cold (regardless of temp outside) it takes forever to start it. It cranks and cranks and cranks and after a couple seconds of cranking I stop, wait a second, then try again. Usually it takes two sometimes three tries to start it. The guy who I bought it off of said it has newer glow plugs (last year I believe) and also I have replaced the batteries. Once its warmed up it does not do this at all.
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2003 CC 4x4 ... I am pretty sure I know what is going on, but I wanted to start a thread for when I confirm it. I am driving to work this AM and I hear the door ajar chime and I think to myself, uh oh...gauges all look good, there are no lights illuminated on the dash. I get to work and turn the truck off and my fan stays on. I think the ignition module is going bad. Either that, or my remote start is going on the fritz. I will update when I find out more.
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