You've completely ignored the fact that in park or nuetral, I can rev the engine at will, leaving it at 4,000 5,000 anything, for as long as I want, without ANY issues whatsoever. If there were leaks, the idle speed would increase, right? It idles perfectly, even after it's been cutting out. It's only under LOAD that the engine cuts out, the greater the load, the more frequent the cutting out. The throttle works PERFECTLY. I'll just put the old one back on if it makes you feel better. It really hasn't made any difference. Be reasonable. It's only after the sugar or crap clogs the filter, that the engine cuts out. It's SUPER DIFFICULT to get it to show the "throttle actuator motor range/control/performance loss" error code. I've literally got to drive it first to get the fuel rate to grab enough stuff, then it cuts out, and then I've got to floor it while it's just idling. Then, and only then does the ECU figure, "hey, the sensors say the pedal's to the metal but there's no RPM or fuel consumption, there's some, CAUSAL disconnect, between the throttle position and the engine RPM and MAS readings etc". I guess that does take awhile, ha ha. Only then I get that code but I thought it might be the throttle itself. VW says that these come pre-calibrated, no learning procedure required. There is no calibration procedure on this unit. It's fitment chart is one engine the W8, for 3 years. Sure, on a throttle for the 1.8 L, you'll have a calibration. Ask VW, consult the service manual. No calibration required if bought from OEM source, and there is no other source, but I could be wrong. It does say Bosch on it. I looked for it on the Bosch website but I couldn't find it. Anyway, No calibration required, but if you find a procedure for this engine and everyone who sells this throttle is wrong, please let me know. OK? HEY Right, just look up the part on any one site like VWPARTSSOURCE.COM, it tells you there, "no calibration required" Anyway, it drives and fails EXACTLY the same as with the old one, It idles perfectly, and first thing out of the driveway, I floor it and it goes like crazy, and that's it. I've got to shut it off and start it later. Then I drive more carefully, but the point is made. END OF STORY. Fuel supply Problem. But if you can find the pin numbers in the throttle plug, I'll back check them. OK? If you can tell me how the socket in the ECU is numbered, I can follow the schematic a guy sent me and I can check wire continuity too. Just curious, in your long career, How many throttles have you calibrated on W8 engines?
This reminds me of all those guys that told me it was IMPOSSIBLE to fix those VVT wires, a rat ate, to the hairy wires on the nub. They had SO MUCH EXPERIENCE blah blah, my God they went on.. I went home and figured out how to fix them, did it and they are FIXED, using silver epoxy. It looks ugly, but all the Electronic specs are spot on, no kidding, and then it idled perfectly as before. Screw those guys. If the VVT actuators weren't discontinued, they would have talked me into a multi-thousand dollar repair. Crooks. They could very well
We'll find out soon if the main problem is the filter and tank. Next might be the fuel pressure regulator but there are codes for that. Mmm Don't know. We'll go from there. I really appreciate your help. I had to admit you have a point. That tube for example 07D 129 482 . What does that do? I'll replace the MAS and I've long thought there was a gap between the MAS and the adjacent tube, but it was the intake side, so...I got the O ring. We'll see. So I'm on the same page. I just drove it more and made more observations and gave it more thought. This is a true story my father had have created this problem to get me back. Anyway, I think I agreed with everything you said Except the calibration. I will take the manifold off and fix things so I'll replace the plugs, the MAS, and many things as you said. With pin numbers, and time, we will find please find out what the tube is Find out what that tube is for, and see if you can get the pin numbers on the plug and ECU do I can check everything. If it runs perfectly, after the tank is cleaned, well, I still would like to know, because it could be necessary, if not now, later. I don't want to poke around blindly. The schematic is simple but if I don't know how the actual objects have their pins numbered, the schematic does me little good.. I could easily screw something serious up. Thank you again in advance and in what you wrote. I agree. I'm getting the tank cleaned, new filter first. Your homework is to figure out what the tube is for, and how to number the pins on the throttle and ECU so they match up and I don't royally ruin something very important. Hey, thanks for everything.
Well, I drive but the throttle cuts out Mechanic's Assistant: What is the model/year of your VW? My ODBII said P2101 TAC Throttle Actuator motor failure or range control issue 2003 VW Passat W8 wagon Mechanic's Assist...
Well, I drive but the throttle cuts out Mechanic's Assistant: What is the model/year of your VW? My ODBII said P2101 TAC Throttle Actuator motor failure or range control issue 2003 VW Passat W8 wagon Mechanic's Assistant: How many miles are on the VW? Is it an automatic or a manual transmission? I've replaced the throttle body and it changed nothing Mechanic's Assistant: Are you fixing your Passat yourself? What have you tried so far? The gas in my car is a year old. I got some gas restorer I wondering if the MAS could also be suspicious Mechanic's Assistant: Anything else you want the Mechanic to know before I connect you? I've bought 3 new Bosch fuel filters