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TDI 101 Got a simple/basic TDI question? Are you a newbie (new to the forums). Feel free to post your question here.

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Old January 4th, 2002, 03:51   #1
wpeets
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Join Date: Dec 2001
Location: Chateaugay NY 12920
Fuel Economy: 38/39
Default warm weather warm TDI engine hard starting

Posted Dec.11 and have tried all suggestions with no luck. Starts immediatly in cooler weather. Have a grey 109. I park in garage on weekends about 45 F. Starts very hard but never fails. Leave outside much cooler and starts immediatly. Maybe some new suggestions. Do not suggest trading, dealers don't give much for TDI's with 101,000. Where would I hide if I sold it to an individual. Runs like a new one. How quick should a TDI start. Maybe I am expecting to much. Dealer feels there is something wrong but clame they cannot detect. TDIfriday seems to have the same problem but no email address would like to hear from TDI. If any one else has this same problem please help. Left NY drove 300 miles early Wednesday morning shut the engine off tried to start, it did start but turned over several times. I would say excessive. Started immediatly that afternoon, quite cold out in CT.
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Old January 4th, 2002, 04:03   #2
VelvetFoot
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Default Re: warm weather warm TDI engine hard starting

Have you checked for smooth operation of the changeover valve.
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Old January 4th, 2002, 04:11   #3
MOGolf
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Default Re: warm weather warm TDI engine hard starting

Please refresh us on what suggestions you have tried.
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Old January 6th, 2002, 09:34   #4
wpeets
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Default Re: warm weather warm TDI engine hard starting

I brought the car to the dealer I am not very talanted when working on a TDI. I change the oil and filter. Left it there for four days, They said they did every possible check. Checked timing belt and timing, compression, anti-shudder valve, coolant sensor, injector pump, and who knows what else. Just wondering if I am the only one in the USA with this problem. Also would like to know how long is excessive cranking when starting a warm engine.
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Old January 6th, 2002, 09:57   #5
landrumdh
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Default Re: warm weather warm TDI engine hard starting

how long is excessive cranking?
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Old January 8th, 2002, 03:23   #6
wpeets
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Default Re: warm weather warm TDI engine hard starting

Excessive cranking, probably 8 to 10 seconds, starter sometimes starts to slow down. Battery was checked OK. Second battery 99 TDI. IT was like winter in CT this morning maybe 18 to 20 Degrees F. Started immediatly. Drove 24 miles to work restarted after a few minutes to move vehicle for snow removal, probably 5 to 8 seconds cranking. Seems to start better with excellerator down.If I can rememder. I believe the car use to start immediatly for about the first 55,000 when warm. Can't believe I am the only one with this problem although thats what the dealer and VW tells me.
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Old January 8th, 2002, 04:34   #7
MOGolf
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Default Re: warm weather warm TDI engine hard starting

No, you're not the only one with the problem. See this other recent thread.
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Old January 8th, 2002, 04:45   #8
MOGolf
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Default Re: warm weather warm TDI engine hard starting

Have they checked the amperage draw of the starter when cranking hot? Is it within spec?

Other possibilities (not in any particular order): injection timing (we've known a few shops to not get this right), coolant temp sensor (G62), engine speed sensor (G28), fuel cut-off valve (N109), cold start injector (G81).
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Old January 8th, 2002, 13:48   #9
DieselDrinker
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Default Re: warm weather warm TDI engine hard starting

iīm not a mechanic, but i know that pumping the gaspedal will do nothing, so it is just your imagination, maybe you feel you are helping it or something, maybe the injectors are injecting too much fuel and it has to clear it out, actually what i know to do to flooded cars, at least with gasoline fuel injected is push the gaspedal all the way to the floor and hold it and then crank it so it puts no more dieselfuel into the cylinder. Notice: is there smoke coming out of the muffler as you are cranking it? if so that means it is burning excess dieselfuel, and therefore flooded! It is giving it as much dieselfuel as it would if it was cold, and you know that it does not need as much when it is warm, of course. Maybe there is something wrong with the injectors??? hmmm try my idea, crank it for a few second, push the gaspedal all the way down and hold it while cranking, good luck! PS: my motherīs 2001 Volvo S60 T5 does also not like to start sometimes in the very hot, and if you do this it starts right away!

[ January 08, 2002: Message edited by: DieselDrinker ]</p>
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Old January 8th, 2002, 16:14   #10
Army_Steve
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Default Re: warm weather warm TDI engine hard starting

Guys,

I think that I may have found a partial fix to this problem. When I stop the car, I wait for four seconds before taking out the key from the ignition. During this time, I hear three sounds coming from the dash and the engine. Two sounds are electrical switches and one is (I believe)the change over valve going back to open position. I've been trying this for the last week and my success rate for warm start is 95%.

I will keep trying this method and if it keeps being successfull, I will discuss with the dealership.
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Old January 9th, 2002, 00:00   #11
wpeets
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Default Re: warm weather warm TDI engine hard starting

MIGOLF: Thanks for the info. Checked that thread out and it looks promising going to e-mail and see if anyone has found the problem. Guess I'am not a mechanic throwing all those numbers at me kind of scarey, may have to go back to dealer and pay the price.

[ January 08, 2002: Message edited by: wpeets ]</p>
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Old January 9th, 2002, 03:07   #12
wpeets
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Default Re: warm weather warm TDI engine hard starting

Diesel Drinker & Steve Thanks for the info will try both suggetions. Do not hear to well so do not hear any thing after turning off key but will certainly wait a few seconds before removing key. Diesel Drinker I don't pump the peddle just hold it down after cranking for a while. Probably was going to start any way. Imagination is probably very correct. Went out to car and looked for gas pedal couldn't find it in my TDI I did find a diesel pedal, Just kidding really appreciate all the support I have received. Just had to put in that little dig couldn't pass it up. New to this club but think it is the greatest. Try to read everything. By the way I am not the best at spelling is there a spell check and if so how do I access it.
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Old January 10th, 2002, 00:52   #13
DieselDrinker
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Default Re: warm weather warm TDI engine hard starting

well, just so you know, i proved me theorie on the pedal pushing thing, i went to test drive a new beetle TDI yesterday evening and the dealer who was very stupid, turned the key right to on without letting the glow plug come on at all, and it was very cold last night(for so cali anyways) and it cranked and cranked and cranked, so i asked him if he minds if i try it, so i let the glow plug light come on and tried it, still cranking away and nothing, so i pushed the pedal to the floor and cranked....... started within 4 cranks. I know this now for a fact, that depressing the pedal to the floor and holding it there with the key to on, then cranking while continuing to hold it tells motronic to not deliver any more "primer" diesel fuel to the cylinder, therefore clearing the flood..... coincidentally, upon starting it there was black smoke to come out the back muffler(and yes i know itīs a diesel pedal, forgive me for my horrid english) but this *does* work, good luck! oh, and turn the key to on, then press it to the floor as hard as you can, and crank, try that, it really does work, but make sure you hold it in, pushing it down while cranking does nothing, you have to press it before!
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Old January 10th, 2002, 03:23   #14
wpeets
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Default Re: warm weather warm TDI engine hard starting

Hey Diesel Drinker at this point in time I'am willing to try any suggestions. Will try. Push the peddle first, all the way, thanks
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Old January 15th, 2002, 14:32   #15
HowardZ
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Default Re: warm weather warm TDI engine hard starting

Skypup and some others have reported that changing the battery solves this problem.
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