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Old 12-09-2012, 11:36 PM
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Default Starting Problems

I have a 2000 1.8t. Starts fine when its cold (hasn't been driven , like mornings). But if i drive it and it gets to normal driving temp and turn it off its hard to start up or will not start at all (cranks over and over).

I recently changed the fuel filter thinking it was the culprit but no change. I do have a cel light on and has been on a while and had it scanned with oxygen sensors problems showing. Could this be causing it not to start correctly. Would love to have it scanned with a vag if..if..if anyone in the area has one and willing to help out... Thanks for all help.. trying to make it until after Christmas to fix the oxygen sensor (because they are expensive)..
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Old 12-10-2012, 12:04 AM
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Yes that will do it . Your car only reads the oxygen sensors after it is warmed up and gone into a closed loop mode. That is what the technical term is. During warmup while in open loop the preset parameters just pump a little extra fuel in so your engine doesn't die out or stall, kind of like an old fashioned choke. Yes, I said old. Like since the beginning of time up until the early eighties.

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Old 12-10-2012, 12:44 AM
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Quote:
Originally Posted by Beetle Bug Man View Post
I have a 2000 1.8t. Starts fine when its cold (hasn't been driven , like mornings). But if i drive it and it gets to normal driving temp and turn it off its hard to start up or will not start at all (cranks over and over).

I recently changed the fuel filter thinking it was the culprit but no change. I do have a cel light on and has been on a while and had it scanned with oxygen sensors problems showing. Could this be causing it not to start correctly. Would love to have it scanned with a vag if..if..if anyone in the area has one and willing to help out... Thanks for all help.. trying to make it until after Christmas to fix the oxygen sensor (because they are expensive)..
Have the car scanned for codes and let us know what they are. Could also be your Crankshaft Positioning Sensor or your ignition switch.
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Old 12-10-2012, 12:53 AM
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Even when the car starts fine and runs fine when cold..I am reading a few posts about it being the temp sensor.. Any ideas?? It truly only does this when the engine is warm
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Old 12-10-2012, 02:47 PM
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Even when the car starts fine and runs fine when cold..I am reading a few posts about it being the temp sensor.. Any ideas?? It truly only does this when the engine is warm
Could be. Get the car scanned for codes and quit guessing
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Old 12-11-2012, 07:31 PM
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After installing new fuel filter & Temp sensor its starting great.. Thanks for the help..
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Old 12-11-2012, 07:32 PM
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Could be. Get the car scanned for codes and quit guessing

I did have it scanned.. Thats why i said.. I HAD OXYGEN SENSOR PROBLEMS.. I just would love to have it scanned with a Vag-Com..
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Old 12-11-2012, 07:45 PM
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I did have it scanned.. Thats why i said.. I HAD OXYGEN SENSOR PROBLEMS.. I just would love to have it scanned with a Vag-Com..
Vag -com are nice but not absolutely necessary. A generic OBD II code reader does the trick if a Vag com isn't available.

I just never saw where you posted the codes. Sorry.
Glad you have it all fixed.
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