» Site Navigation | | » Recent Threads | | | 1999 M3 Swap 09-07-2023 10:10 PM 06-01-2024 03:04 PM 7 Replies, 409,823 Views | | My 318ti build 05-21-2024 04:48 PM 05-28-2024 06:42 PM 1 Replies, 3,601 Views | | OMG!OMG! 05-28-2024 08:53 AM 05-28-2024 08:53 AM 0 Replies, 1,431 Views | | | | | | 11-20-2010, 07:21 PM | #16 | Junior Member Join Date: Nov 2010 Location: UK Posts: 15 | Quote: Originally Posted by xxxJohnBoyxxx See if you knocked the cylinder head temp sendor plug loose? I've done this on a oil change and it will cause hard starts... | Do you mean the coolant temp sensor? underneath in the intake manifold? | | | 11-30-2010, 05:53 AM | #17 | Senior Member Join Date: Dec 2007 Location: Gulfport, Florida Posts: 3,208 | Quote: Originally Posted by zahir_213 Do you mean the coolant temp sensor? underneath in the intake manifold? | Yes the one that is in the head and is for the gauge and DME readings... Sorry for the delayed responce. | | | 11-30-2010, 10:36 AM | #18 | Junior Member Join Date: Nov 2010 Location: UK Posts: 15 | Just a quick update, I did a live reading using carsoft, which indicated that the air intake temp sensor and the coolant temp sensor are showing correct readings. Just out of interest, what voltage range should the maf showing on the live reading? Thanks | | | 01-29-2011, 06:07 AM | #19 | Junior Member Join Date: Jul 2007 Location: Montreal Posts: 8 | zahir any update i'm having the same issue? thanks! | | | 01-29-2011, 05:03 PM | #20 | Senior Member Join Date: Jan 2010 Location: Earth Posts: 178 | Quote: Originally Posted by zahir_213 With regards to the codes it gave me the following results: 62 Randon/Multiple : Misfiring in several cylinders 29 Switching solenoid for Air Assisted Injection Valves Control Circuit (Bank 1) 35 Additive mixture adaptation (idle), bank 2, control limit reached | Interesting, something is too far out of whack and the computer cannot compensate .Idle mixture adaptation sounds like fuel trims.. Air assisted injection valves--You know this doesn't work. Say air is injected AFTER warmup (if your solenoid is stuck OPEN?) o2 sensors compensate for more air, your fuel trims be off now? Did you try disconnecting the battery for some time? Just thinking it might clear the fuel trims. Found this online " Additive mixture adaptation (Idle) Vehicle idle If the value is greater than 0.2 ms then there is an unmeterd air leak where not enough fuel is being supplied to the system or an erroneous signal from the air mass meter. The oxygen sensor signal measures a lean signal which causes the DME to compensate and make the mixture too rich. If the value is less than -0.2ms then there is an air restriction, and too much fuel is being supplied to the system or an erroneous signal from the air mass meter. The oxygen sensor signal measures a rich signal which causes the DME to compensate for the problem by making the mixture too lean. Once a certain threshold (ms) value is exceeded the system can no longer offset the problem and a fault is logged. " Last edited by Junk; 01-29-2011 at 05:06 PM. | | | 01-29-2011, 07:08 PM | #21 | Senior Member Join Date: Dec 2007 Location: Gulfport, Florida Posts: 3,208 | Adaption value error with a stock code on your DME meaning your not running a modified performance code is either a bad O2, stuck secondary airpump solinoid or vacuum leak. Can also be a exhaust leak before the O2 sensor Most likely a vacuum leak | | | 01-30-2011, 01:30 AM | #22 | Junior Member Join Date: Nov 2010 Location: UK Posts: 15 | Quote: Originally Posted by bmeck88 zahir any update i'm having the same issue? thanks! | still having the problems, it also seems to be getting worse. The weather hasn't been great here for the last 3 months so I am struggling to get anything done to the car! Lots of good info from the guys on here so thanks to all for that. I think the first thing I really need to do is to remove the intake manifold and check all the vacuum hoses underneath. Then if that doesn't find the problem I will dig deeper and look at the sensors. keep me updated if you have any luck with yours | | | 01-30-2011, 01:35 AM | #23 | Junior Member Join Date: Nov 2010 Location: UK Posts: 15 | Quote: Originally Posted by xxxJohnBoyxxx Adaption value error with a stock code on your DME meaning your not running a modified performance code is either a bad O2, stuck secondary airpump solinoid or vacuum leak. Can also be a exhaust leak before the O2 sensor Most likely a vacuum leak | Sorry if this question sounds amateur, but what is the secondary airpump solenoid? | | | 01-30-2011, 06:03 PM | #24 | Senior Member Join Date: Jan 2010 Location: Earth Posts: 178 | Air injection solenoid is #10 in this diagam.. http://bmwfans.info/parts/catalog/E3...l_vacuum_tube/ Definately check the hoses like others mentioned, airpump solenoid is not likely the more I think about it. | | | 01-30-2011, 06:17 PM | #25 | Junior Member Join Date: Nov 2010 Location: UK Posts: 15 | Quote: Originally Posted by Junk | I will have to check this, also what is part 15, I have never seen this on my car when working on it? | | | 01-30-2011, 10:33 PM | #26 | Junior Member Join Date: Jan 2011 Location: Fayetteville, ga Posts: 12 | The crankase vent valve on the back of the intake is a problem. Black round cylinder with hoses. Usually if they are bad they will suck air from the bottom (unmetered air). You can reach underneath with the car running and feel the leak, or spray carb cleaner and the idle will increase. That or air boots is usually the mixture faults. | | | 01-31-2011, 12:46 AM | #27 | Junior Member Join Date: Nov 2010 Location: UK Posts: 15 | Quote: Originally Posted by marc The crankase vent valve on the back of the intake is a problem. Black round cylinder with hoses. Usually if they are bad they will suck air from the bottom (unmetered air). You can reach underneath with the car running and feel the leak, or spray carb cleaner and the idle will increase. That or air boots is usually the mixture faults. | very good info but its definitely not the crank case vent valve as I replaced it 4 months ago | | | | | Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | | Posting Rules | You may not post new threads You may not post replies You may not post attachments You may not edit your posts HTML code is Off | | | |