Long start when warm?

[kalib0y]

^ have you figured this out? I am curious

[blacksport325]

So, I can narrow it down to the point of when the engine is warm and turned off for only a few minutes it will start as normal (i.e. getting gas), but when its left for 10+ minutes or so it will take awhile to start. Does that rule out anything? Still sounds like a FPR, I might as well try it.

[blacksport325]

only 318is's with the M42 prime the pump. all other E30s only turn on the pump when the ECU sees an RPM from the crank.

I've got a M42, so it should prime when the key is turned to ON and not START? Does this mean it is still possibly a FPR issue?

[nando]

My guess is FPR. Mine did this same thing. Try putting the key in the "on" positon for like a second of two to let the pump fill the rail with fuel, this eliminated my long starts because I didnt have to wait for the rail to build pressure while cranking.

only 318is's with the M42 prime the pump. all other E30s only turn on the pump when the ECU sees an RPM from the crank.

[Kershaw]

might be the starter dying. when its cold its fine, but when the engine bay heats up (and the starter with it) it wont work well.

[blacksport325]

I tried turning the key to let the fuel rail fill and start, no change. Maybe it is a coil/spark...

[urbancynic]

I had this in an 86 325e.

I replaced the fpr, both fuel pumps, and eventually the coil.

Turned out it was the coil.

To eliminate wasting money I would break out the bentley manual and start doing tests on the fuel system and the coil and replace whatever is questionable.

In my case the coil was still in spec, but only marginally.

[Balleristic31]

My guess is FPR. Mine did this same thing. Try putting the key in the "on" positon for like a second of two to let the pump fill the rail with fuel, this eliminated my long starts because I didnt have to wait for the rail to build pressure while cranking.

[blacksport325]

I hate to keep bombarding the gen. tech. with questions, but on my 91 318is, I am getting a long crank when the engine is warm, it will start after about 5 seconds of cranking. The battery WAS bad, I just replaced it and I can hear the starter moving faster than before but it is still taking 5 seconds when the engine is warm. When it's cold it starts up as expected (<1 second), I have visually inspected for torn intake boots but didn't see anything, I will attempt to smoke test it this week to make sure but when I sea-foamed it a few weeks back I didn't have any smoke in the engine bay.

I can hear the fuel pump kick on for a second of less when turning the key but I don't smell gas. Could this be a fuel pressure regulator issue as well? The car has new plugs, I guess it could use plugs but something tells me this is a vacuum/fuel issue.

Thanks in advance.