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A8 will crank but wont start after sitting for few hours

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Old 03-21-2014, 06:57 AM
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Default A8 will crank but wont start after sitting for few hours

2007 A8L 4.2 Quattro

Every morning I have same issue will not start. Cranks fine no fire.

Usually can start by resetting the electronics by unhooking battery.

will start fine and run all day if I can get it cranked in AM.

Once started it will start fine all day no issues

but next morning I have same issue will not start again.

In short hot car starts fine.. cold car does not

could in be water/trash resettling in bottom of tank or filter?


Any ideas?
Old 03-21-2014, 07:07 AM
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Originally Posted by rfmad
could in be water/trash resettling in bottom of tank or filter?


Any ideas?
Possibly.

Suggest performing an autoscan and looking for G40/G28 problems, or any other DTCs.
Old 03-21-2014, 06:26 PM
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Sounds like it may be your rear delivers fuel pump. That controls startup from what I have read.
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