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Sedans Volkswagen Jetta VW Jetta TDI
3704 messages, Last post on Nov 26, 2009 at 6:42 PM
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Replying to: swalsh19 (Jan 18, 2009 4:44 pm) Any leaks in the intake plenum will sould like a "whistle" as the turbocharger builds up pressure in the intake system. Check all connections from turbocharger, thru intercooler and into the intake manifold are correctly fitted. |
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| This is our first message. We have a 2004 Jetta TDI. We live in Colorado and are having some cold weather. We had trouble starting it and the mechanic replaced the glow plugs (which did nothing) and then replaced the fuel transfer pump. It now starts ok, but when you step on the throttle, nothing happens. We have to restart the car numerous times and then it will finally throttle up and drive and start great the rest of the day. What the heck is going on? | |
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Replying to: dkgarcia (Feb 04, 2009 4:41 pm) In-fact, the TDI engine does not even have a throttle-cable. Instead the throttle-pedal is simply a rehostat which sends electric signals to the engine computer. I do know that if the vehicle thinks that the brake-pedal is pushed, it will refuse to "throttle up" (your words). Given this, you can try pulling the brake-pedal up by hand and see if this helps the problem. As for your "starting problem"... I would put money on the fact that your IQ is not set correctly. (Injection Quality) This is the #1 reason for hard starting TDI engine. It is easy to check IQ using a VagCom |
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Replying to: bpeebles (Feb 06, 2009 6:20 pm) |
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Replying to: bpeebles (Feb 06, 2009 6:20 pm)
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Replying to: dkgarcia (Feb 07, 2009 7:56 pm) The TDIs start very well in the winter. Just wait for the glowplug lite to go out. The colder it gets... the longer it takes for the lite to go out. (more heating required) Many folks find that the TDI is so durn efficent that it does not create enough heat to warm up the cabin. Thusly, they have installed TDI heater which preheats the engine before starting it. I use a TDI heater with a timer which heats for ~2-hours before starting the engine at 5:30AM every morning. |
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Replying to: dkgarcia (Feb 07, 2009 7:56 pm) So, if the temperature sensor that tells the computer that the engine is warm already fails, then it may not turn the glow plugs on, and then it won't start. I'm not sure, but I think the symptom would be that the glow-plug indicator lamp on the dashboard would not light up, or would light very briefly. I've had to change all the glow plugs in my '98 NB TDI, which my son now drives. Our 2009 Jetta TDI Wagon Hi-Line is being prepped at the dealer, and they have to install the mud flaps and tint the windows before we take posession 
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What's the cost like after 36k miles? such as oil change and other major services? So the normal oil change interval is 10k miles? Thanks, NJ.
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Replying to: Firebird_EOU (Feb 16, 2009 10:07 am) So if you are the stereotypical car owner that is at the 10th year. 
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Replying to: Firebird_EOU (Feb 16, 2009 10:07 am) This is mostly due to a diesel having absolutely no ignition-system to deal with. (sparkplugs, wires, distributer...etc) Most of the other maintenance costs are about the same. ESPECIALLY since the newer gassers are now Synthetic oil. This makes these 2 engine-types the same in the way of lubrication cost. If I were asked to think of DIFFERENCES between Diesel and gasser in terms of PMs. I would have to say the FUEL FILTER on the diesel is larger. That is about it. Diesel = Larger fuel filter Gasser = Ignition system components to PM
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