intermittent no start

[raaizin]

I have had this intermittent no start for the last couple of years. Car is a 2007 A6 with 29k miles on it. It seems to be happening more frequently. Audi dealer checked out starter/alternator/battery and said all is within spec. Battery is new. Here is what is happening. Every 20-100 starts the when I turn key no crank. Some times I hear a slight click, other times I hear nothing. After 2-5 attempts she starts right up. Once it has started, usually cranks and starts no issue. It is more pronounced when car sits. To date car has always started after a few attempts. I am thinking of changing the starter relay it is only $12. Dealer couldn't duplicate, and to be honest sometimes it goes very long between issue occurring. Any thought are welcome.

 

[Eddie]

I would remove all grounds wires, sandpaper and reconnect. Check ALL of them including thouse on the chassy.

 

[The_Jeff]

If it happens again try it with the shifter in neutral instead of park. (This would indict the transmission safety switch.) Is there an alarm/immobilizer on the thing?

 

[raaizin]

Originally Posted By: eljefino
If it happens again try it with the shifter in neutral instead of park. (This would indict the transmission safety switch.) Is there an alarm/immobilizer on the thing?



Only factory alarm

 

[mechtech2]

Replacing the cheap relay is a smart move at this time.
If it fixes it, great! If not, no real loss and a gain of a new part.
I'd test WHERE there is no electrical power in the system when it fails. Start in the middle or at either end - two different theories.
I realize more than most about intermittent problems! Can be tough!