e46 325ti - no throttle response at all!

[Fordo]

Hi all, my 325ti has developed a very weird issue, and was wondering if anyone more knowledgeable than me could help?

As the title says - I have zero throttle response. Was out driving, everything fine, then suddenly, no throttle. Thankfully wasn't far from home, so very slowly I nursed car home under idle power.

A little context - earlier today I was investigating why id developed a 'no-heat through the vents' issue - i'd removed airbox, disconnected maf sensor (so i could get to and investigate heater control valve), and I changed and bled coolant, re-assembled everything and the heaters were fine again. Most likely was an airlock in the heater matrix or the heater valve had got stuck.

Anyway - the car then developed a peculiar issue - I thought more coincidental than connected - the car would start then die straight away. I disconnected the maf sensor, as that was the only sensor i'd dis-connected. Car would then start and operate normally. - So i assumed a dirty of faulty maf, and just coincidence than this problem occurred just after looking into a coolant issue.

Running with no maf should be fine for the short term - car just runs on a default map, and won't be as fuel efficient.

But just now on a test drive, suddenly the throttle just stopped responding. Up until this point, it had been fine. Now connecting the maf now doesn't cause car to die like before.

Most odd - I can't figure it out at all.

Anyone have any suggestions? (besides towing the car to a bmws specialist.). Typically these things happened around christmas time!


Thanks in advance for any suggestions

- Pete

[Fordo]

Thanks, thats some good info!