Cold start problems, please help!
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Joined: Dec 2007
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s500
Cold start problems, please help!
I started having problems when the weather out here in SanFran started getting cold, in 40's(F). When the engine has not been run in for at least 3 hours, the engine will crank over (of course by itself) for at least 10-15 secs before it fires up. Also, after starting the car cold if you step outside you smell gas fumes. If the car is warm then the car starts normally within 3 secs.
I have brought the car to my independent mechanic and he has changed the crankcase position sensor and sparksplugs and can't find any other computer error codes.
Could it be the 1. Air flow mass meter 2. faulty fuel pump 3. bad battery in key ( I notice the batter has been wearing out because i have to stand 1 foot from the car to open and close doors.
Please help me before I bring to dealer who will charge me without mercy..
I have brought the car to my independent mechanic and he has changed the crankcase position sensor and sparksplugs and can't find any other computer error codes.
Could it be the 1. Air flow mass meter 2. faulty fuel pump 3. bad battery in key ( I notice the batter has been wearing out because i have to stand 1 foot from the car to open and close doors.
Please help me before I bring to dealer who will charge me without mercy..
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'19 G63 Ed 1,'18 M5, '16 G63,'12 458 , '11 E63, Brabus SL55-K8, '10 S63, '94 E500 "Wolf", '91 560SEC
my car is doing the same thing and i have replaced the same things as you plus the fuel filter...still the same problem. i think it is a weak fuel pump
Super Member
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From: Saint Louis
CLS 63 S AMG , s500,clk550
im here in stl and its cold my car sometimes cranks over for about 2-4 secs before starting up sometimes.. its normal.. but if its really 15secs long.. take to the dealership before it ends up costing you a fortune
Thread Starter
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s500
Yes I changed the fuel filter too. My indep. mech. measured the fuel pressure from the pump and said it was 30% lower than normal but it seems to run great after the car starts and he's not convinced his measurement is accurate.
Does anyone know if the Air Flow Mass Meter cause the cold start problem?
Does anyone know if the Air Flow Mass Meter cause the cold start problem?
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2007 S600
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From: Brooklyn
02 S500 Sport
Im in Cold Weather here, its like 30 degress outside.
only issue is when I start car up when leaving it overnight steering wheel is frozen for few min lol.
I need to jerk it left and right so it unfrezzes
only issue is when I start car up when leaving it overnight steering wheel is frozen for few min lol.
I need to jerk it left and right so it unfrezzes
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Joined: Dec 2005
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From: New Jersey
2000 S500, 2001 Camry,1996 Honda SUV
it sounds like you have water in your steering fluid. Frozen Water will damage your steering pump. It is cheaper to change the steering fluid now.
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From: Brooklyn
02 S500 Sport
I didnt have it today though and when I do its just for like 1 second..
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From: Lexington, MA 02421
2014 GL450
starting prob
you said you had the crank"case" position sensor replaced
please be more specific - is it the crank"shaft" or "cam"shaft position sensor
the latter are known to fail and cause this issue
hope this helps - good luck
please be more specific - is it the crank"shaft" or "cam"shaft position sensor
the latter are known to fail and cause this issue
hope this helps - good luck
Thread Starter
Newbie
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s500
solved
turned out to be a bad injector which was flooding the engine randomnly upon engine starts. dealer also replace both 02 sensors near injectors, said flooding damage them. cost $1800.00. Yikes!
