On my2003 4.6 V8 engine. Sometimes it will crank, rev up then drop down.
But every once in a while, it will drop down so low that it stalls out.
Starts right up after that. Seems to happen when temps are lower. No check engine, no codes.
Any ideas?

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2003 4.6is X5
2003 525it
2003 E53 X5 Standard shift