M4 START

[motosportm4]

after firing the car the revs go crazy and the engine can go out. It always happens when the car is standing a few hours. Can anyone help?

[G35POPPEDMYCHERRY]

gotta pull some codes.

plugs/coils
intake?


people with more knowledge will chime in

[motosportm4]

no mistakes. intake system I have EVENTURI CARBON. I replaced New: Candles plugs and injectors. D
I have no idea what's going on

[andrei.m4]

Install stock intake

[Luc@Speed&Tech]

Had this exact issue when I installed my Eventuri intakes a while back. Just had to tighten down one of the clamps on the silicone couplers.

[motosportm4]

Reading this forum I read that the problem may be EVENTURI intake. That's why I checked all connections very carefully. Despite this, the problem is still there After uploading the MHD program, the problem subsided for one day, but after driving a few kilometers and the next day firing again, the speed jumps.I upload the STOCK maps again and the car starts normally, when I drive the car again the next day when firing, the revolutions go crazy. I upload the mhd map again, e.g. STAGE 1 STAGE 2 STOCK, this car can stand in the garage for a few days and each time after starting the engine the speed is good. just drive a few kilometers and the problem returns
after each FLASH the car fires up and works normally until you drive a few kilometers and the problem returns .....

[jpy1980]

Originally Posted by motosportm4

Reading this forum I read that the problem may be EVENTURI intake. That's why I checked all connections very carefully. Despite this, the problem is still there After uploading the MHD program, the problem subsided for one day, but after driving a few kilometers and the next day firing again, the speed jumps.I upload the STOCK maps again and the car starts normally, when I drive the car again the next day when firing, the revolutions go crazy. I upload the mhd map again, e.g. STAGE 1 STAGE 2 STOCK, this car can stand in the garage for a few days and each time after starting the engine the speed is good. just drive a few kilometers and the problem returns
after each FLASH the car fires up and works normally until you drive a few kilometers and the problem returns .....

Try installing your stock intake and see if the issue persists. Could also maybe be your maf sensors.

[motosportm4]

Originally Posted by jpy1980

Try installing your stock intake and see if the issue persists. Could also maybe be your maf sensors.

Will mount the original intake and check. Are these two sensors in the entry you write about them?

[jpy1980]

I don’t know what you mean but here’s a good tutorial on how to clean your maf sensors:

[sicck_m4]

Check your mass air flow sensors. Make sure there is no damage and installed proper direction of air flow.

[motosportm4]

after uploading map stock, stage 1, STAGE 2 the car works normally. The problem starts when I arrive a few kilometers and start the engine the next day?

[motosportm4]

after uploading map: stock, stage 1, STAGE 2 the car works normally. The problem starts when I arrive a few kilometers and start the engine the next day?

[rapsquared]

Have you followed the advice thus far? A fresh flash takes all of the learning away. Likely a leak after the MAF that the ECU cant compensate for. Reinstall OEM intakes or at least check MAF sensors in the Eventuri setup. A good shop can read MAF signals, maybe a sensor or wiring was damaged?

[motosportm4]

today such errors popped up .......

[carbon//m3]

Stop trying to self diagnose with all those misfires and take it to a reputable Bmw mechanic and have it checked.

[motosportm4]

the car was at several BMW mechanics. Replaced: valvetronic engine, candles, injection. Still the fault and problems is with the morning start only stopped clicking after waking the car as the valvetronic engine was replaced. But the problems with starting the car are still there and these errors are sent which I send after replacing the vvt engine. I am looking for help here because in my country nobody knows what is happening with this stupid M4!

[carbon//m3]

Put it to stock 100% make sure your MAF are installed correctly and not dirty.

[TheirThere]

Originally Posted by motosportm4

after uploading map: stock, stage 1, STAGE 2 the car works normally. The problem starts when I arrive a few kilometers and start the engine the next day?

i was having the same sort of cold start issues.
disabled the cold start option on my MDH tune.
car is back to starting and running silky smoothhhh.

(my neighbors hate me, again)