I had exactly the same problem of poor hot (and cold) starting with my AEL engined A6 when I first got it. With the help of Bladerunner (RIP) up in Chesterfield we tried many things to remedy it but the thing that worked in the end was a replacement second hand fuel pump.
Jonathan reckoned that the AEL fuel pump doesn't like it when people start running on SVO, the seals start to break down and the pump can't make enough pressure while the engine is cranking to crack the injectors. He strongly suspected a previous owner of my car had been running my engine on veggy oil.
I'm not techno savvy enough to know whether this is right but the replacement fuel pump sorted my problem and the car starts like a dream nowadays.
Cheers
David
Jonathan reckoned that the AEL fuel pump doesn't like it when people start running on SVO, the seals start to break down and the pump can't make enough pressure while the engine is cranking to crack the injectors. He strongly suspected a previous owner of my car had been running my engine on veggy oil.
I'm not techno savvy enough to know whether this is right but the replacement fuel pump sorted my problem and the car starts like a dream nowadays.
Cheers
David
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