Question about 2005 Volkswagen Jetta
Sounds like throttle body not fitted correctly or needs adjustment of idle sensor or idle speed control
Posted on Nov 15, 2012
i would replace the accelerator cable. After almost ten years im sure that wire encased by that plastic sheath has a lot of **** in it. Not letting the cable move freely inside of it.
Posted on Nov 20, 2008
SOURCE: 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
Posted on Dec 16, 2008
The parts aren't really that expensive, it's the labor these places charge an hour. Call around and see who can do it the cheapest, unless you want to do it your self.
Posted on Jul 22, 2009
the air pump is located on the engine towards the front of the vehicle and has apx. 3/4 diameter pipes running to and from it. it is apx. 2 fists in size and it is black plastic. one of the lines on top of the air pump runs to the other side of the engine towards the firewall. at the other end of that pipe is the valve. disconnect that pipe while the vehicle is running. no air out of the pipe means bad pump. air coming out of the pipe means bad valve
Posted on Feb 13, 2011
SOURCE: VW Golf Mk4 1.4 16V AHW, backfires when cold. There were three broken wires, one goes to the EGR, one to the throttle body and one to the mass air flow. New throttle body, Coil pack and wires tested.
Aparently, a "full diagnostic" has NOT been done. If this statement were true, you would have found the cause of your problem.
With that said, backfiring is usually caused by damaged/leaking exhaust valves. Have you performed a compression test on this engine?
If the computer is "getting the wrong reading of the air/fuel mixture", then you should be getting oxygen sensor and/or fuel trim codes.
The coolant temp sensor does not cause the computer to get the wrong reading of the air/fuel mixture, it causes the computer to get the wrong reading of the engine coolant temperature. Although this will affect how much fuel the computer gives the engine, it does not cause it to get wrong readings of the mixture.
Just so you know, "diagnostics" consist of a WHOLE LOT more than hooking up a code reader and pulling codes from the engine computer.
People think that an automotive repair technician simply plugs in the "magic box" and replaces all the parts the "computer" tells him to replace...I WISH it were that simple!
Posted on Mar 18, 2012
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