316 cranking but not starting - 316i BMW Cars & Trucks

sounds like the immobilisor _

Does it not crank over? If it it cranks and does not start,disconnect the air flow meter which should put the vehicle into "service" mode and if the airflow meter is the cause of the "no start",it should start.

its a bmw 316 i fitted with a M43 motor

crank angle should be near the harmonic balancer

cam sensor near the upper camshafts






cam sensor

You may need a mechanic for this one.
The first three codes are for coil problems on cylinders 1-2-4.
Code 316 is for a cylinder miss on startup which would follow along with the other codes.
Someone would need to test the coils and the circuits that power them.
It is unlikely all three have failed, but rather something with the computer or the crank or cam sensors.

P0300 is random multiple cylinder misfire and P0316 is misfires detected on start up. This is an ignition related issue. I would check the ignition system and tune up condition and proceed from there also if you have access to a sanner with live data capability check that you have and RPM reading when cranking the engine and the times it deosnt want to start this would indicate an issue with the crank sensor

Hi, My thoughts exactly ( fuel leak). Is this a deisel or gas engine?
In both cases be very careful with lights or cigarettes.
You can smell it when you get out of car in a garage or stall.
Good luck.

check TDI crank sensor. It might be missing pulses due to some faulty plug or connection.

NEED TO CHECK IGNITION COILS WIRES HOOK UP.CHECK THE COIL WIRES ELECTRICAL CONNECTOR MAKE SURE IT HAS GOOD CONNECTION AND ALL COILS GETTING GROUND.

171 system to lean bank one, 174 to lean bank 2, 300 multiple miss fire,316 crank sensor defective. Does it run rough? Replace crank sensor first.

try to jump start with a good battery first then if doesn't make change try try to knock gentle the starter using a long bar or wood while someone cranking the ignition key, if the engine start,then your starter motor subject to be replace if not then you have to check you starter relay and starter power supply