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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKVII-Mk7 Golf family including Golf Wagon (~ 2015 +)

VW MKVII-Mk7 Golf family including Golf Wagon (~ 2015 +) Discussions area for the Mk7 (2015+) Golf and Golf Wagon TDIs based on the MQB (Modularer Querbaukasten) platform.

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Old September 17th, 2018, 19:29   #76
HANSEN1937
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Join Date: Sep 2018
Location: West Bend, Wi.
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Quote:
Originally Posted by 1945GPW View Post
Hey Guys!! I'm new to the form but have had diesel VW's for about 6 years now. I am more familiar with the MK4 Jetta's but recently purchased a 2015 Golf TDI and I'm really liking it.
Anyway as the title says I'm experiencing a longer than normal cranking period the very first start of the day. After that initial long start it starts normally through the day. What I mean by long crank is the engine turns over approximately 4 to 6 times before it starts. After the first start of the day it will crank about 2 turns and fires right up.
Is anyone else experiencing this and if so whats the fix for it? My golf has 24000 miles. I replaced the fuel filter and its not any better. I'm thinking the HPFP is possibly de-priming over the night causing the extra cranks, what are your thoughts? thanks
There is an excellent video on U-tube explaining and demonstrating the repair.
The link: Vw golf 2.0TDI EA288 long crank diagnose P0341/P0016/P0011
See DIAGNOSE DAN.
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Old October 1st, 2018, 05:40   #77
dj7373
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So any new updates on this issue?
I'm also getting long starts on the first start of the day and I'm worried that it might become an issue as it gets colder.
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Old October 11th, 2018, 20:20   #78
RockRockRock
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I had this issue after putting in a cheaper fuel filter and getting the Stage 2 fix... So I couldn't tell what caused it.

The dealer mentioned the battery was on the way out. I put in a new battery and the car hasn't done it except for the first crank.

Theres a crazy sensor suite on new cars. Need to feed it plenty of angry pixies.
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Old October 16th, 2018, 11:22   #79
marcusku
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Fuel Economy: 56/52/48
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So any new updates on this issue?
I'm also getting long starts on the first start of the day and I'm worried that it might become an issue as it gets colder.
On my car at least the problem only exists in warm weather. When the temp goes below 45 degrees it starts impressively fast. I wonder if it's a programming issue--the car should be running the glow plugs but doesn't at warmer temps.
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Old October 17th, 2018, 06:19   #80
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Fuel Economy: Mid 40s
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Under certain cold-start conditions, these cars have a provision to purge the air out of the HPFP prior to allowing the fuel to pressurize. Apparently the CP4 are a lot more sensitive to damage air causing them to run dry. So under certain conditions the rail pressure regulator valve opens for a few seconds on a cold startup to make sure the HPFP is properly primed to avoid damage from air in the pump.
Did anyone see this?
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Old October 17th, 2018, 06:20   #81
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In a CP3 or CP4 system, a deflation of the low or high pressure stage may be necessary if the vehicle was driven on an empty tank, or after the engine is started for the first time. In a CP3 system the air is shifted by the presupply pump through the metering unit. It then reaches the fuel pump again through the zero delivery throttle. This may result in long starting times or the engine not starting. In CP4 systems a deflation of the high pressure stage by opening the PCV may be necessary under certain circumstances. Deflation of the high pressure stage will become active, if at a starter speed the rail pressure does not exceed a pressure threshold even after a certain time.
Or this?
If it starts everytime maybe just let it do its thing.
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Old October 18th, 2018, 20:04   #82
marcusku
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Originally Posted by GreenLantern_TDI View Post
Did anyone see this?
I'm seen this but not sure I'm convinced. Doesn't make sense to me why this would only happen in warmer temperatures.
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Old October 18th, 2018, 21:29   #83
itsmejerry
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I'm tempted to say it's no big deal, but if it concerns you here's my 2 cents:



1. Battery A good battery will have a huge surge of power during key-on/(Glow Plugs), and a diminished battery wont. The OEM battery gives ABSOLUTELY ZERO warning before going bad. Glowplugs take far more "instant" energy than a starter, and even though you don't have a slow turning starter, get ready for your battery to suddenly and irreversibly go out.

I've replaced 2 this year. One on my 2015, and another on an In-Law's 2014. Good one start- Then nothing.



2. You could have air leaking into the fuel system. Doubtful, unless you've not tightened the screws down on the fuel filter canister. But it's worth checking. Also check fuel lines going into and out of the fuel filter.



3. A cracked or pulled fuel line on the fuel filter. During maintenance the top gets folded back a bit, and this could have loosened it just enough to move a hose enough to break the seal.



Temperatures in the 50s can require a bit more glow plug time than temps in the 60's.

So many of us have gotten used to quick glow systems that we hardly even pause before turning the key or pushing the button again on remote key cars. This is the time of year that it starts to become noticable.



For the OLD SCHOOL diesel folks- (70's and 80's) it was nothing to turn the key and have to wait 20 seconds for the glow plug light to go out. Mom's former 1976 Mercedes 300-D would require 2 pre-glows of about a minute each during very cold weather. Nothing quite like sitting on leather seats for 2 minutes before turning the key when it's 10 degrees F outside.
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