Hot start failure diagnosis
#31
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Well now I'm really stumped on where to look next. I replaced the CTS again but with an OEM to see whether it made a difference, and NO it didn't. I still have the same issue when the car was drivin and reached operating temp, and come out to re-start with a hesitation. Now as I mentioned before, my hesitation is not very long, but I was more worried about it getting worse and then getting stranded.
So here is the interesting part. Now that we are into winter and it is colder outside, the car starts better initially AND I don't have the hesitation in starting that I was trying to fix!!! So obviously this is a heat issue, but I don't know what component or where to look. As I said before, we had previously hooked it up to Vag-Com and there were no codes. I probably won't see the issue again until the spring time so not sure what I can do at the moment. Anyone have any ideas????
So here is the interesting part. Now that we are into winter and it is colder outside, the car starts better initially AND I don't have the hesitation in starting that I was trying to fix!!! So obviously this is a heat issue, but I don't know what component or where to look. As I said before, we had previously hooked it up to Vag-Com and there were no codes. I probably won't see the issue again until the spring time so not sure what I can do at the moment. Anyone have any ideas????
#32
AudiWorld Super User
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Well now I'm really stumped on where to look next. I replaced the CTS again but with an OEM to see whether it made a difference, and NO it didn't. I still have the same issue when the car was drivin and reached operating temp, and come out to re-start with a hesitation. Now as I mentioned before, my hesitation is not very long, but I was more worried about it getting worse and then getting stranded.
So here is the interesting part. Now that we are into winter and it is colder outside, the car starts better initially AND I don't have the hesitation in starting that I was trying to fix!!! So obviously this is a heat issue, but I don't know what component or where to look. As I said before, we had previously hooked it up to Vag-Com and there were no codes. I probably won't see the issue again until the spring time so not sure what I can do at the moment. Anyone have any ideas????
So here is the interesting part. Now that we are into winter and it is colder outside, the car starts better initially AND I don't have the hesitation in starting that I was trying to fix!!! So obviously this is a heat issue, but I don't know what component or where to look. As I said before, we had previously hooked it up to Vag-Com and there were no codes. I probably won't see the issue again until the spring time so not sure what I can do at the moment. Anyone have any ideas????
#33
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I have a similar post on here...had the same issue. They tried thermostat, plugs, timing, everything. Finally the CPS fixed the issue.
#34
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Not sure how its "non-related" as it is a hot start issue? Even if the solutions are different, you would think having members post the multiple solutions they find in one post instead of individual posts may help others identify possible leads on solving their own. Not trying to be confrontational, just sharing my thoughts as I've been searching for others input in multiple threads which I thought could be related.
#35
#36
AudiWorld Super User
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Not sure how its "non-related" as it is a hot start issue? Even if the solutions are different, you would think having members post the multiple solutions they find in one post instead of individual posts may help others identify possible leads on solving their own. Not trying to be confrontational, just sharing my thoughts as I've been searching for others input in multiple threads which I thought could be related.
Unfortunately not all of us find our problem by searching the forum because the thread subject is not always accurate to the
problem, I'm only stating that a new post might bring in new ideas.
Your problem could be a intermittent failure with the fuel pressure regulator at a certain event, a good way to rule this out would be to check your fuel rail pressure before starting hot while you watch and someone starts.
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