I took my '87 E30 out to the track yesterday. It ran well until I ran into a fuel starvation issue mid-session. A few seconds after most right-handers, the engine would become starved for fuel and run dry for 2-3 seconds before returning to normal operation. The tank was about 75% full when it started happening. If I was well below half a tank, a simple lateral fuel slosh starvation issue might be the root cause, but I'd still be surprised. With as much fuel as the tank had when it started, I believe there is something more serious afoot, but I'm not sure what or how to further test it.
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Early tank with the metal crossover line, right?
I'd pull the pump out of the tank and see if you can see anything
down there, from rust to water to a loose 'wet sump' cup around the pickup.
Do you have the double pump arrangement, still? If so, your lift pump
might be having trouble.
I run an early tank with a late 318is single pump in it, and can reliably run down
to a couple of gallons without starvation. But I'm slow.
tnow, sometimes I just mess with people. It's more entertaining that way. george graves
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