Starter fires nicely but car doesn’t start almost like you’re out of gas. Sometimes it catches barely but stalks out immediately.
Happens to me periodically but happening a lot lately. Once a day. No pattern .
Cold fuel pressure start. Try keeping the key forward for a little longer to let the pimp prine.
OK.
NY07RS4 suggested that. I hvae a good video of it from my dashcam. I love my frigging dashcam.
Any fault codes?
How old is your battery?
original battery
no faults relating to this
brainstorming: a flakey fuel pump relay. It may not be throwing a code yet.
did the key on help
Interesting… I had something happen to me about 2 weeks ago. Car was running great, shut it off for about 10min, started it back up and died, then tried to start it and could hear starter kicking over but damn thing didn’t start. Just keep cranking and never started.
At the time, I scanned engine and didn’t get any engine codes. I let it sit for about 20min to cool down (was driving pretty aggresive at the time) and it started right up without a hiccup. I did a full scan when I got home and it caused a fault in steering wheel module:
1 Fault Found:
02071 - Local Databus
37-10 - Faulty - Intermittent
I was having weird issues with my remote and wondered if it was just the battery. I changed the battery on the remote and since that day it hasn’t happened again (just not really sure if its the remote). Without any other codes or symptoms, I’m left to think maybe transponder issue??!!
didn’t do it. Keep forgetting to.
If you use a key without the proper immobilizer it will do that (spin the starter without catching). Wonder if your weak battery caused that.
Saki, you still experiencing this?
It just occurred to me a common issue on the old mercedes is a check-valve after the accumulator to keep fuel from draining back from the engine. I’m sure we have a similar valve, and IIRC, it’s in the fuel filter (can anyone confirm?)…when’s the last time you changed yours?
Immo is usually just like an RFID chip in the key, that gets interrogated by the instrument cluster. Likely not RFID, but similar. Passive device in the key, powered bit in the cluster. The key battery powers the lock/unlock transmitter, but probably not the immo.
Ah. Ok. Make0s sense.
From what I understand your fuel pressure regulator and return is all in the filter
I believe my fuel filter was done about 20,000 miles ago. I may just put a new one in though. I have one here.
That wouldn’t be a bad idea 20,000 is past what I believe is the recommended interval
Audi recommended is like 45,000 or 55,000
Officially it is lifetime. I replace my S4’s regularly but that is because I want max performance and my car sits for long periods of time so the fuel starts to break down.