Long crank before startup?
Thread Starter
Member
Joined: May 2016
Posts: 133
Likes: 8
From: Stanwood WA
2015 SLK 350
Long crank before startup?
So twice in the last week I have gone to start the C350 and it will crank, kind of hiccup keep cranking and start. Not sure what it is or if anyone else has had this problem. The second time happened while out of town and was a bit unnerving. Could this be a starter or crank position sensor problem?
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Joined: Apr 2015
Posts: 1,739
Likes: 120
From: London ON Canada
2012 C300 4Matic Sport Sedan
Check your air filters change or clean them, I had this issue and was thinking crank position sensor the mechanic I went to said highly unlikely. He told me to bring it in.
I changed my air filter and couldn't believe how much **** was in them after 10,000km.
My long crank went away pretty weird to tell you the truth.
I was also looking at fuel pump but no dealer has heard of anyone replacing on in a w204 and the crank position sensor is a ***** to do but they said it is highly unlikely you will have to change that. I tried to change it to be safe but it is to complected and in an awful spot to do it yourself.
I changed my air filter and couldn't believe how much **** was in them after 10,000km.
My long crank went away pretty weird to tell you the truth.
I was also looking at fuel pump but no dealer has heard of anyone replacing on in a w204 and the crank position sensor is a ***** to do but they said it is highly unlikely you will have to change that. I tried to change it to be safe but it is to complected and in an awful spot to do it yourself.
Thread Starter
Member
Joined: May 2016
Posts: 133
Likes: 8
From: Stanwood WA
2015 SLK 350
Check your air filters change or clean them, I had this issue and was thinking crank position sensor the mechanic I went to said highly unlikely. He told me to bring it in.
I changed my air filter and couldn't believe how much **** was in them after 10,000km.
My long crank went away pretty weird to tell you the truth.
I was also looking at fuel pump but no dealer has heard of anyone replacing on in a w204 and the crank position sensor is a ***** to do but they said it is highly unlikely you will have to change that. I tried to change it to be safe but it is to complected and in an awful spot to do it yourself.
I changed my air filter and couldn't believe how much **** was in them after 10,000km.
My long crank went away pretty weird to tell you the truth.
I was also looking at fuel pump but no dealer has heard of anyone replacing on in a w204 and the crank position sensor is a ***** to do but they said it is highly unlikely you will have to change that. I tried to change it to be safe but it is to complected and in an awful spot to do it yourself.
Super Member
Joined: Nov 2008
Posts: 604
Likes: 29
From: SA
2008 C350-Sport-AMG-Active Agility Pack(Not reliable) +Izuzu KB6 3L(It seems Reliable)+Mazda
When new my car started like any other car, just fine. On the 1st service the man with the white coat told me they replaced the crank positioning sensor due to a bullitin, bad batch from factory. Now some time after that I started noticing the car sometimes swings a lot, I switch it off, on again and it starts.
I reported this every service for 6 years, they never could find the fault, its usually after I driven between 20-50Km's I noticed this. In the mean time the steering lock and EIS was replaced and battery recently, but not that either.
I have a feeling it has something to do with the CPS they put in. It had not dropped me for this reason yet.
My aircleaner was indeed filthy dirty, they must have only replaced the filters under gurantee, those two holes in the back was completely block, but this was not the problem either. This is the only car I ever owned that starts with unpredictable turns.
I reported this every service for 6 years, they never could find the fault, its usually after I driven between 20-50Km's I noticed this. In the mean time the steering lock and EIS was replaced and battery recently, but not that either.
I have a feeling it has something to do with the CPS they put in. It had not dropped me for this reason yet.
My aircleaner was indeed filthy dirty, they must have only replaced the filters under gurantee, those two holes in the back was completely block, but this was not the problem either. This is the only car I ever owned that starts with unpredictable turns.
Last edited by Moto_Guzzi; Sep 4, 2018 at 05:45 PM.
MBWorld Fanatic!
Joined: Apr 2015
Posts: 1,739
Likes: 120
From: London ON Canada
2012 C300 4Matic Sport Sedan
Ya when you like to DIY you can throw money around quick with these cars.
I'm happy mine was just the filters. Start from the cheapest item before going nuts my new motto hahaha.
I'm happy mine was just the filters. Start from the cheapest item before going nuts my new motto hahaha.
Super Member
Joined: Nov 2008
Posts: 604
Likes: 29
From: SA
2008 C350-Sport-AMG-Active Agility Pack(Not reliable) +Izuzu KB6 3L(It seems Reliable)+Mazda
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MBWorld Fanatic!
Joined: Jun 2011
Posts: 2,543
Likes: 311
From: Canada
A car
Here is/was my troubleshooting steps.
1) This only ever occurred if it was a REALLY hot day out, and I garage-park my car overnight. This means that once the car goes back into the garage, that it can easily reach 45'C or even higher because I'm parking a really hot car into a space with 0 circulation.
2) The next day, I'll go to start my car and the cycle is extended, and about half way through the 3 or 4 second start process, it just hesitates a bit.
3) When I'm out and about, this issue never rears its head. It just turns over and starts just fine without delay
4) This issue NEVER happened even if it was -40'C out...
5) This is the first summer that I've been in which is this friggin hot, and I just replaced my battery earlier this year with an OEM one so I know for a fact it isn't the battery that was dying. That's why I left it be and now the issue has gone away.
That said, I have no idea why this issue occurred. As batteries get really hot, their CCA isn't affected, I mean, sure, their battery life gets affected, but it shouldn't cause a longer than usual start. Anyone have any ideas?
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MBWorld Fanatic!
Joined: Jun 2011
Posts: 2,543
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From: Canada
A car
Senior Member
Joined: Apr 2018
Posts: 254
Likes: 13
From: Out Towards Palm Springs
2019 GLC 350e
I sure can
Vapor lock is a problem that mostly affects gasoline-fueled internal combustion engines.
It occurs when the liquid fuel changes state from liquid to gas while still in the fuel delivery system. This disrupts the operation of the fuel pump, causing loss of feed pressure to the carburetor or fuel injection system, resulting in transient loss of power or complete stalling. Restarting the engine from this state may be difficult.
The fuel can vaporize due to being heated by the engine, by the local climate or due to a lower boiling point at high altitude. In regions where fuels with higher volatility are used during the winter to improve engine startup, continued use of the specialized fuels during the summer can cause vapor lock to occur more readily.
https://en.m.wikipedia.org/wiki/Vapor_lock
Its probably not that but being old school, it came to mind
Super Member
Joined: Nov 2008
Posts: 604
Likes: 29
From: SA
2008 C350-Sport-AMG-Active Agility Pack(Not reliable) +Izuzu KB6 3L(It seems Reliable)+Mazda
If so why does it starts immediately within 3 turns if you switch it off (without pulling the key) and restart it again, myne behaved like this every time-?
