I have a 2003 Z4 3.0 with 194,000 miles on it. The car starts and runs fine except when I get gas, then it seems to be flooded when I try to start it. Good thing I have a strong battery because I crank it and crank it and then it catches, slowly while black smoke is pouring out. My question is why does it flood only when I get gas? My gas cap light came on a couple times, i bought a new gas cap and I haven't seen the light since. Can it be that I have a small vacuum leak?
Starting difficulties
- Thread starter asurber
- Start date
Scan it for codes, bad inlet camshaft sensor is a symptom of bad starting, found that out when I forgot to plug mine back in when I changed the cam cover gaskets. The car started but it wasn't instantanious as it normally was. Plugged it back in and instant starting was restored. If the sensor is bad it will have set a code but not necessarily set the EML on the dash, it may take a number of bad starts until it lights the EML as an attention getter.