Sirs:I have a 2006 TDI Jetta with a factory new engine. The body has 200,000+ on it. The original engine developed a leak in the fuel injector somewhere and either a replacement head or a new engine was required. I opted for the new engine. The problem is that both the original engine and the new engine have an intermitten stutter at 1800 to 2000 rpm that makes one think the fuel is turned off suddenly. This last for about 1 to 2 seconds and then the engine starts running again. It only occurs with the a/c on and it occurs in any gear. It is much more pronounced in the new engine than in the old engine. Which I thought was being caused by the leak around the injector. Obviously, not. So, five different mechanics have looked at and driven the car and none can tell me what is causing the problem. Further, the stuttering is there at higher rpms, but not nearly as noticeable. The scan of the computer shows nothing wrong. I need to find out if anyone has an idea. Emmit Williams
Country: United StatesMake: VolkswagenModel: Jetta TDIYear: 2006Engine: Turbo Diesel.
The car has been to three shops with no answers.
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Yes, I still need an answer. The vehicle is currently not reliable as is, and I am in need of the transportation. I drive about 75,000 miles a year, so I need my car running at peak all the time. What information does the expert need. Emmit
Michelle, Do you know when the expert might be responding? I need to contact the shop where the vehicle is now located this coming Monday afternoon for discussion about the path the repairs are going to take. They are currently baffled. Emmit
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Walt, yes, I want to hear from one of experts about the problem.
Let me know your VIN so I can look up info related to your build data.
Also, has anything else been replaced- injectors, fuel pump, etc?
Hi, I will have to get the VIN, but the injectors, fuel pump, and glow plugs all came with the factory long block that I had installed at 199,800 miles. The car now has just over 200,800 on the odometer. It is a 2006 TDI with no after market mods.
Sir: the VIN for the Jetta in question is: 3VWST71K36M630199. Any assistance you can supply at this point will be greatly appreciated. The engine was a factory new long block, but the problem was evident in the old engine. Which I attributed to the problem with the injector leaking exhaust back into the fuel system. Apparently, not, as the problems still exist, albeit the fuel system and injector problems were solved.
Does it do it consistently at that RPM no matter what gear it is in? And have you replaced the fuel filter and the air filter just to eliminate those as the issue?
Sir: they apparently did not send you the original email. When the new engine was installed two thousand miles ago, ALL new filters were installed. It does not matter what gear it is in, it is only the RPM that is consistent at 1800 to 2000. It seems to have the problem at higher RPM's, but it is not as blatant as it is at those RPM's. It does not always do it, but seems to be in conjunction with the cycling of the compressor on the A/C. I can't be sure of that, but it is only after the engine is at normal operating temps, and after it has been turned off a short time, and then restarted.
So it typically will not do it the first trip, while it is warming up, or even after warmed up, but will do it on subsequent trips after it is warm? And is it EVERY time you get within that RPM range, or sporadic? Does it do it with the A/C turned off? What area of the country are you in, does it ever get really cold- do you notice it then?
You seem to have it nailed down to an electrical control issue- either related to a sensor or an actuator at a specific RPM.
Yes, the problem is basically in the 1800 to 2000 rpm range. It is not consistent in happening. It does appear to be when the vehicle is at operating range. It does not cause any problem at all when the A/C is off. There are no check engine lights, so there is code being registered. I am in the Central U S, in the midst of the warmest weather on record, and the average cold weather temperture is around +20 degrees F.