M52. No start sometimes. Getting fuel & spark. no code

[ColdAccord]

97 328i. Won't start sometimes. I mean like once every 3 weeks it won't start and I leave it for anywhere between an hour and a day, starts when I try again. When it doesn't start, it is getting fuel and spark. It is not throwing a fault code.

[Brew]

Sounds like its flooding. Next time it happens, hold the throttle to the floor and crank it. This will put it in "clear flood mode" and it will probably fire after 15 seconds or so. Very common on E36s during the winter. Try a different gas station.

[Jason89i]

is the engine warm or cold when it doesnt start? cheers, jason

[ColdAccord]

it has done it on both occasions

[ColdAccord]

Sounds like its flooding. Next time it happens, hold the throttle to the floor and crank it. This will put it in "clear flood mode" and it will probably fire after 15 seconds or so. Very common on E36s during the winter. Try a different gas station.

if that doesn't work (tried it before and didn't work) any other ideas?

my buddy was into rx7's,w ould just pull the fuse for the fuel pump when it flooded

[Brew]

How long did you crank it for?

I believe there was a software update from BMW for this very issue on the E36, can't remember which motor though.
Its possibly you have a leaky fuel injector, but usually that will just cause a misfire after startup. Its also possible that your coolant temp sensor is acting up.

[ColdAccord]

last night i drove to hockey, then went out for a bit. hopped in my car, started fine. sat for a bit to let it warm up, then drove 10 blocks to go get pizza. 15 min later i get back in and no start. clear flood mode, starts after not even a second. drive 2 miles home and park

just now, 10 hours later, hop in to go to physical therapy. No start. clear flood, still no start. crank for like 15 seconds, no start. dis/reconnect neg battery, still no start. wait a few min, still no start.

[jahnaboi]

Bad ecu temp sensor?

[ColdAccord]

I've tried it every day and no dice. today it was warm out and it started right up