rough idle question

[e30m3ochoa]

So I have a 89 325i and as of yesterday the idle was going crazy to the point where the car would turn off. I tried turning it on today again and the same thjng is happening but it doesnt last more than a couple seconds on. It sounds like a vacuum leak but the other idea I have is my fuel pump giving out. Any ideas will be appreciated.

I'm trying to post a video but for some reason it won't let me.

[TSI]

If it sounds like a vacuum leak, chances are it is.

[Kozworth]

Explain going crazy. Is it high, low, revving randomly? Does it die with gas given to it?

Easiest way to test the fuel pressure is splice a fuel pressure gauge in and see how it reads when it's about to die. If any faults in pressure, inspect all lines for leaks/cracks/kinks and check fpr for losses in pressure. Much better to catch one of those faults before throwing in a pump and turning out that's not the reason for lack of pressure

[e30m3ochoa]

So when I turn on the car it starts off pretty good and a couple seconds later it starts reving randomly. When the rpm needle comes down it sometimes goes to the 500rpm and a little above it and sometimes a littlw below until it turns off. At times the engine stays on for a little while but the random reving continues. When I open the throttle it sounds like its struggling to accelerate.