99 528I stumbled then ran poorly help!

[70marlin]

I was at a dealer looking to buy an older 99 528I with 156,000 on the old girl. she was looking sweet, black on black! I was sitting and idle'ing she had a slight miss? Then I started the test drive and it sound like it jumped timing or it lost coils I just turned the key off and handed the key to the sales men. I really liked this car any ideas what might casue this?

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[Lord Vader]

Vacuum leak. Bad spark plugs. MAF sensor gone bad. Could Be a few different possibilities but vacuum leak is usually most common. If you are interested in it get a service history. If they don't have any records then walk away. Theirs plenty of other ones out their.

[70marlin]

Thank you Lord Vader! I've really feel in love with the 5-series platform! I’m pretty sure that I will own one or more in my life time. This car and my economic position right now just don’t match, maybe as a project / second vehicle just for fun and some garage bonding time I think I’d be hooked.

[Lord Vader]

I'm sure another one will come along. They made enough of them that it wot be an issue. Used dealers are really shady. Some things are fine but when they try to hide stuff that's when I walk away. I will probably need buy a car from a dealer again. Providing I can find a good used M5 from a local enthusiast! Haha