Betty the Black E21 BMW 320i

[Senor_Taylor]

New plugs and wires, and then a reset on the timing. She's running better than ever when warm.

Still seems to have a leaking injector. Running super rich and lots of pops and burbles on the overrun. I think that's my warm start issue too. These injectors are not serviceable, so I'll swap to the other set I have and start saving my pennies for some new ones.

Cold start takes a second, seemingly like there is no fuel in the lines and it has to prime. Warm start is quick, but will stall immediately unless you mash the accelerator. Then it will miss for a second like it's too rich, then clear up. If you do not catch it and it stalls in the hot start, then it takes forever to start. Like 30 seconds of cranking.

My thinking is an injector is leaking and pooling on top of the intake valve. On a cold start, it's had enough time to leak past the valve and it's just no fuel in the lines. On a hot start, there is still liquid fuel sitting on top of that valve. You get a chance to fire it off on the first crank since that fuel on top of the valve just falls into the cylinder and you can keep it alive with a lot of throttle. If you don't catch it, then the air fuel ratio is way off with that liquid fuel in there and it doesn't start, plus the lack of fuel in the lines. I think

Also, posted a video on Jake's thing of some brake service.