Last week ,fault throws up light and on diagnostics at my friends college,software says the fault is carburetor system and states nothing else.i cleared the light and it came back few hours later.
so today ive had it booked in at a garage that deal with this and they said the problem is air flow meter under load. although they are famous for trying to sell afm for no reason. they didnt say that the code came up saying afm. they turned out the light and within 2 hours was back on.
im thinking they just turned it out,it drove ok with spare afm in as is now not on limp mode and feel thay can get 300 quid off me.
so if i ignore the afm idea for now what should i be checking on the origional carburetor system fault e.g sensors etc?
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I'm sorry Roger but you are going to have to get it to someone with access to the plug in diagnostic unit for Beemers.
there seem to be several things going on but when it coughs up the diagnostic info you may go straight to it?
The fault reason appears in the instrument panel or internal damage EML control module. EML system has self diagnosis function, also has the failure protection function, when the EML system failure, it can transmit the signal to the engine control module, common control solar term door position motor, maintain solar term door opening to suppress the rotation speed of the engine, so the fault that caused the engine speed can't go up. Use obd2 for automotive diagnostics , you can improve vehicle safety performance and driving more safer.
get car onto diagnostic machine to find the fault, then you can decide if you want to fix it or get the garage to do it for you....
ive been in the trade for years and with modern cars guesing whats wrong is too costly..computers are good for somethings.....
I have one of those BMWs and they are the most unreliable cars. Too many non-functional badly designed sensors and buggy engine management software that can function without problems for a few month. Mine is 6 years old and the dealer for the last two years could not figure out why I am getting misfire, one time on cylinder 3, another on cylinder 4. They just keep swapping coils, injectors, they even reloaded the engine management software, according to them. I still get it. The dealer just kept in fact just erasing the error but could not really fix the problem. The car also leaked coolant and oil just after the extended warranty expired. If you have one of these cars without warranty, expect to spend $2000 to $3000 every year just to keep it running. My 4Runner did not cost me a penny for 8 continuous years, just basic maintenance but no repairs.
Google BMW misfire or E46 misfire and see for yourself. Man, you will get zillions of results descrbing the problem with no answer. It is all gussing but no real answer to the problem.
The Ultimate Driving me Crazy Machine.
Check the ABS brake sensors in your wheels, if they are not functioning properly. It will trigger the computer to engage the ASC auto stability control light as the asc uses the brakes to assist in control. I will also engage the EML engine management light to slow the rev point to limp mode
you could have one of many faults. It would be dvisable to read the fault memory of your engine mangement unit. sounds like your throttle housung unit is more than likely your fault, but is impossible to know without using a diagnostic computor