A friend of mine said a possible cause of my vw's issues are a dirty throttle body. My 2001 Passat stutters from time to time.
He also said the fuel filter is a cause.
Can you describe the location of the fuel filter and throttle body for me please.
Thanks for your time
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Re: throttle body in 2001 Passat
Throttle body is located at intake manifold ..follow snorkle from air cleaner to where it attaches to motor ..looses hose and clean with carb cleaner there..open blades(throttle) to get behind entry good also..... fuel filter is located in tank and in line from fuel tank just in front of tank inline with fuel line...good luck
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Possible defective/sticky idle air control motor. It may also be caused by a dirty throttle body/plate causing minimum airflow to be off. I would suggest cleaning the throttle body/plate with carb cleaner to see if the problem corrects itself. If not, the IAC may not be working properly and causing this issue. Is the check engine light on? If so, scan for any codes that may pertain to an idle issue and repair as necessary
Sunroof drains are a common problem on many models. Cleaning or modifying the sunroof drains usually takes care of the problem. You may resolve your problem. I believe that the trouble codes are unrelated and may need professional diagnosis as you need VAGCOM to adapt the throttle.
Check motor mounts, check CV joints both of thees issues can cause the engine to stutter or shake the other possibility is a fault in the overdrive system of the transmit ion if you have overdrive . also engin idle should be about 500 to 700 rpm normal any higher will case an abruptness .
it can still cause trouble, im a former vw tech, and you would be amazed at how long they last or issues that arrise, I watched a tech install an engine once because he refused to belive radio was failed,
It is a shot in the dark at this point. Your Passat, like mine, is a computer on wheels. Get yourself a VAG scan tool for $50. This will allow you to plug into your car's computer, under the steering wheel, and read its functions. It is easier than Windows for a PC...very user friendly. This will tell you of any issues, even the ones that do not set off the MIL(malfunctionIndicatorLight).
You could have a pre-CAT O2 sensor sening bad readings or a bad ignition coil/wires/or plugs etc...
I do not see how a coolant temp sensor would cause those symtoms, but if the scanner says that it is not getting a signal that it can use from that sensor, then it should be replaced. The computer is smarter than the mechanic, but it can take a mechanic to interpret the codes correctly which is why you post them here. Example, a reading from an O2 sensor may mean that the fuel/air mix is off due to a bad spark plug no burning it's fuel or a dirty air filter causing MAF sensor poblems, when the wrong solution would be to replace the O2 sensor.
VW will charge you over $100 per issue. They will give you the same answer the VAG scanner. You can get OEM VW parts on-line a lot cheaper than the dealer, too.
My old 1992 passat done this when the catalytic converter was faulty but have you tried cleaning the throttle throat, just remove the fat black hose and manualy holding the throat open wipe it clean with a cotton cloth with wd40 applied as oil dries in there causing a residue build up.On idle no fault codes will show with a catalytic converter and mine passed a mot.
Hi, I have a 2001 polo 1.4 mpi it lackes power when you hit a hill it just dies, It has had new cat, fuel filter, fuel pump and throttle body, but is still the same it just dose not want to give me full rev's?
what tha generally means is your o2 sensor is throwing a fault code. this is mostliely due to the fact that your TPS (throttle postion sensor) is not functioning properly. this is why there is also a rough idle to the vehicle. have the TPS replaced and the problem will be solved.