Stalling after cold start
05-02-2016, 03:40 PM
#1
Stalling after cold start
Hi, I have a 2005 e55, this morning I went to go start my car and it started up but was idling rough and then stalled, after it stalled I tried starting it and fired right up like normal, car has 70k and crankshaft sensor was changed at 59k, any ideas as to what is causing the stalling?
05-05-2016, 02:51 AM
#5
Junior Member
Join Date: Feb 2016
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
e55-03 , m3 e36 irs drag car
same as mine
i always come around it this way
turn igniton on 3sec -turn off ,and then start (im guessing loosing fuelpressure when it sitts still is my problem)
iff do not do it that way my car throws mappsensor code at coold startup, and going ultra lean
these cars are so sensitive
this problem came whith 550cc inj and 82mm tb, didnt have it whith stock injectors and tb
i always come around it this way
turn igniton on 3sec -turn off ,and then start (im guessing loosing fuelpressure when it sitts still is my problem)
iff do not do it that way my car throws mappsensor code at coold startup, and going ultra lean
these cars are so sensitive
this problem came whith 550cc inj and 82mm tb, didnt have it whith stock injectors and tb
05-05-2016, 10:45 AM
#7
Junior Member
Join Date: Feb 2016
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
e55-03 , m3 e36 irs drag car
Trending Topics
05-05-2016, 11:11 AM
#9
Member
See attached picture of the Emission/SAI System...
Description: essentially dumps air to your cats for a brief period until they get to "operating temp". If any of the emission hoses are leaking, clogged and/or the shut off valves are faulty, you will get exactly what you described @ startup. This issue is associated with a P0410 code.
Description: essentially dumps air to your cats for a brief period until they get to "operating temp". If any of the emission hoses are leaking, clogged and/or the shut off valves are faulty, you will get exactly what you described @ startup. This issue is associated with a P0410 code.
The following users liked this post:
Elhonaz (05-05-2016)
05-05-2016, 12:18 PM
#13
Member
Think of the motor is one giant air pump. The ECU tasks the emission components to pump more air so the cats/O2's heat up quicker; at the same time extra fuel is added adaptively to the calculated fuel quantity to run the motor smoothly. If you have a leak and/or the valves are faulty your motor will stumble/misfire due to the factors mentioned above.
05-05-2016, 02:15 PM
#15
Secondary air is only injected into the exhaust stream not through the engine so it will not make the engine run any differently. The engine module does not add more fuel when secondary air injection is active since there is no point as the extra air is only in the exhaust and not in the engine. Watch AFR when sai is active and you'll see its very lean. The only possible way for this system to affect driveability is if one of the diverted valves doesnt close completely and would create a vacuum leak but there would be other issues as well.
The following users liked this post:
Elhonaz (05-07-2016)
The following users liked this post:
Dato55 (05-06-2016)
The following users liked this post:
Dato55 (05-06-2016)
05-08-2016, 06:25 PM
#22
MBWorld Fanatic!
I run a very small Dyno tune square fuel pressure,AFR gauge, an Apexi memory boost gauge and instant read air temp gauge. To me these are the most important and really give you instant answers when having a problem and I can see every thing at a glance.Great to have in any E55.
05-08-2016, 06:29 PM
#23
I run a very small Dyno tune square fuel pressure,AFR gauge, an Apexi memory boost gauge and instant read air temp gauge. To me these are the most important and really give you instant answers when having a problem and I can see every thing at a glance.Great to have in any E55.
