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Re: 2.5td cutting out when cold

Posted: Tue Oct 15, 2019 1:29 pm
by Chris Bongo
Once warm, have you taken the van for a run or is it just town driving?

The first time I took my van out (after the initial 4 weeks of no use) I took it around town (say 40 mins, not exceeding 30mph).

Second time I took it for around a 40 mile trip and since it seems to be running 'as it was'.


In the Bongo the glow plugs will come on periodically until the van is 'warm' unlike normal diesels (yeah, I didn't expect that either). You can normally hear the relay click if the van is cold, you get up to around 1500 rpm and then let it coast, hence why I think it was the charging system working overtime on a poorly battery, combined with a cold start issue and low idle, it was never going to go well!

Hope you manage to get to the bottom of your issue.

Re: 2.5td cutting out when cold

Posted: Tue Oct 15, 2019 3:55 pm
by Alkers
Chris Bongo wrote: Tue Oct 15, 2019 1:29 pm Once warm, have you taken the van for a run or is it just town driving?
I have done both without issue, as long as I let the van warm up first. If I don't let it warm up it tends to cut out the first time I slow down in traffic.

Re: 2.5td cutting out when cold

Posted: Wed Nov 06, 2019 12:58 pm
by Chris Bongo
Hi Alkers,

tried anything since?

Re: 2.5td cutting out when cold

Posted: Wed Nov 06, 2019 3:15 pm
by Alkers
Nope, the way the temperatures have been again mine has been fine. It's a lot colder today and forecast from now so I would imagine I will start having issues again...

Re: 2.5td cutting out when cold

Posted: Wed Nov 06, 2019 4:10 pm
by teenmal
Alkers wrote: Tue Oct 15, 2019 1:20 pm I still have the same issue, occurs sporadically although only when the outside temperature is cold. I have found that if I start the van and don't rev it at all and leave it to idle for 5-10mins to warm up then it will be fine. If I start driving before it warms up it will likely cut out when I first slow down. If I rev the engine at all when it's still cold, it tends to cut out when the revs come off or else it will shudder and jump.

I am sure it is related to the cold start solenoid etc but I haven't had the chance (or the weather) to investigate it properly yet, never mind to repair it.

It does sound that your case is happening in warmed weather than mine, unless it's low single digits, mine is fine.

The glow plugs are only related to heating the diesel before it starts as far as I'm aware so if the van is starting then you should be able to rule them out. That being said mine are also of an unknown age and I've had my van five years.




Thats not actually the case, Glow/Heater plugs are on until the engine reaches a certain temperature and switch of at a predetermined RPM. It might have been the problem when you said it cuts out when you rev the engine first time .

Re: 2.5td cutting out when cold

Posted: Wed Jan 15, 2020 12:31 pm
by Chris Bongo
Any update on this Alkers? Unfortunately, mine had only had this issue twice and none since last reported :?

Re: 2.5td cutting out when cold

Posted: Wed Jan 15, 2020 1:15 pm
by Alkers
I was just about to post here again, I had the issue occur again on Thursday night after I didn't let the van up before driving.
Started ok, drove off and after a few hundred m, cut out at traffic lights and very hard to start again (had to press accelerator to the floor).

I had probably got a bit complacent in letting the van warm up as it has been quite mild here.

Fuel tank was full almost to the brim.

Re: 2.5td cutting out when cold

Posted: Wed Jan 06, 2021 10:44 am
by Alkers
And yet again here we are! I have my mot equivalent today and could not get the van to stay running yesterday. Although I haven't used it as much this year it's been fine up until the temperatures have dropped.
I got it started yesterday after four preheats and a few cycles of turning over then preheating again etc. Started and ran for about a minute but only if I kept rpm up with the accelerator then rpm dropped even with my foot burried to the floor and the van died. Tried restarting but was conscious of giving my battery a hard time so left charging overnight. I've left a small heater in the cab this am in the hope that some heat will improve starting, so you there there's anywhere in particular I could direct heat with a fan heater to get it going? Just really need to get it through the test before I can get back to diagnosing it properly.

I'm thinking I will replace glow plugs to rule them out and otherwise have to thoroughly investigated the cold start solenoid. I don't think it's the fuel pump as it runs fine for most of the year

Re: 2.5td cutting out when cold

Posted: Wed Jan 06, 2021 12:35 pm
by Bob
One idea is to drain the oil and heat in a container, then re-fill, or place a 100w light bulb under the sump.

Obviously the more you can protect this from the elements the better. [-o<

Good luck. 8)

Re: 2.5td cutting out when cold

Posted: Sat Jan 09, 2021 5:17 pm
by Alkers
So I managed to get it started and got it through the test.
The click for the glow plug relay was taking so long I had thought it wasn't working, was a good 15seconds or so. By waiting for this click (and still doing a couple of preheats), it's was slightly less impossible to get started, using about 1/3rd of the accelerator while cranking.
Once started, I've found that immediately letting off the accelerator and it will stay running, just about. Cut out once but got it restarted again and after at least a half hour of running you could tell it was warm enough, sounded fine and blipping the throttle with no issue. Then it drove perfectly and was restarting perfectly with no effort whatsoever once still warm.
Through the test so immediate panic over, gonna order a set of plugs anyway to rule them out and after that it's the cold start solenoid and piping. I don't think it's fuel pump as it's perfect once warm

Re: 2.5td cutting out when cold

Posted: Thu Jun 17, 2021 2:16 pm
by Alkers
So I think I have found what was hopefully causing, or at least contributing to, this problem.

Had a look at my vacuum hosing and found that the nipple coming from the air inlet pipe coming from the air filter had broken off so the vaccum hosing was actually not attached at all. Drilled through the pipe and replaced a small section of hosing.

I've no way of testing until the weather gets cold!

<a href="https://ibb.co/CHMvmTK"><img src="https://i.ibb.co/CHMvmTK/2021-06-16-16-32-02.jpg" alt="2021-06-16-16-32-02" border="0"></a> <a Image Image Image

Re: 2.5td cutting out when cold

Posted: Fri Jun 18, 2021 9:26 am
by oibaf
That does sound like it could be the cause of hard starting alright. Hopefully you've got it sorted, would've been a pain to rig up a 100W light bulb under the sump as per Bob's suggestion :lol: .

Re: 2.5td cutting out when cold

Posted: Fri Jun 18, 2021 10:11 am
by teenmal
oibaf wrote: Fri Jun 18, 2021 9:26 am That does sound like it could be the cause of hard starting alright. Hopefully you've got it sorted, would've been a pain to rig up a 100W light bulb under the sump as per Bob's suggestion :lol: .





Yip but you would see The Light.

Re: 2.5td cutting out when cold

Posted: Fri Jun 18, 2021 10:17 am
by oibaf
teenmal wrote: Fri Jun 18, 2021 10:11 am
oibaf wrote: Fri Jun 18, 2021 9:26 am That does sound like it could be the cause of hard starting alright. Hopefully you've got it sorted, would've been a pain to rig up a 100W light bulb under the sump as per Bob's suggestion :lol: .





Yip but you would see The Light.
haha yes!

Re: 2.5td cutting out when cold

Posted: Fri Jun 18, 2021 12:43 pm
by rita
Why not cover the engine with an electric blanket, a 8) and maybe give it a wee dram for good measure.