Cold Starting
As the mornings get colder I’ve noticed the Pajero isn’t enjoying getting going so much. This has previously just been a problem with getting away from a standing start. The first couple of yards from where I park is a very slight incline and it’s coughed a little and lacked power until on the flat where it’s fine.
This morning my outside thermometer read 6 degrees and it felt pretty cold. For the first time since I’ve had her she actually coughed a little on starting the engine - before even setting off. I could imagine that if we were down near 0 degrees she might be struggling to start at all, though I’m only guessing of course.
I’ve had it in mind to check up on this for a while, but it looks like it might be a bit more urgent now. So I need to read up on Pajero cold starting and glow plugs and all the other bits I haven’t a clue about. Then I’ll have a go at servicing it to hopefully make things better. Check back soon to see how I get on!
UPDATE
I started reading up on this on the Pocuk forums and realised that I wasn’t even starting the truck correctly. It’s a long time since I had a diesel, but I always thought it was just a case of turn the ignition key until the dashboard lights come on, wait for the glow plug light to go out and then turn the engine over. This is what I’ve been doing since I bought the Pajero and it must have been working out alright because the weather was pretty warm.
Here’s what I should have been doing:
- Turn the key until the dashboard lights up
- Wait until the glow plug light goes out
- Wait about another 5 seconds until you here a click from behind the glove box area
- Now turn the key full to start the engine
So what we’re waiting for is the glow plugs to heat up fully. The click that comes from behind the glovebox is from the heater relay - once it’s clicked it means the glow plugs are heated sufficiently to fire up the engine. Which leads me to wonder what the point of the glow plug light is really? And on the 2.5 models I believe there isn’t a light at all, you just wait for the click.
Anyway, having tried this technique on several cold mornings now I can safely say that my Pajero starts perfectly. I’m still getting a slightly lumpy getaway but that’s fine too if I let the engine warm up for a minute before moving.
So the servicing of the glow plugs will wait until next spring as originally planned and my Pajero continues to run beautifully.
UPDATE 2
I have to add to this post at this point following a comment from a reader that you can see below - comment number 3 and my answer, comment number 4.
This leads me to point out that my method of cold starting when having problems is only working around a problem with either the glow plugs or the bus bar. So really in this post I have gone full circle and as soon as possible I’ll be thoroughly checking my plugs and bus bar for any problems.
As the truck is generally in very good condition I would make a guess that my glow plugs simply need replacing due to wear. Another possibility is that they may have already been replaced and are not exactly the ones they should be. Someone else told me of having the same problem and when he replaced his old glow plugs he found his new ones were longer, which apparently makes starting easier.
February 28th, 2008 at 6:56 pm
Hi Richie, glad you’re liking what I’m trying to do here.
First thing I’d look at is the fuel system. Have you changed the fuel filter recently and do the fuel pipes look in good condition - not sucking in any air? Let us know how you get on.
February 28th, 2008 at 2:28 pm
hi, great information, well done. now i need to pick your pajero knowledge…
just recently during this cold spell when the temp guage reaches its running temp the engine shudders and cuts out, after a few turns of the key she starts and the problem has gone, ie no more stalling, this happens daily to and from my house to place of work, any ideas what i can do to rectify the problem.
thanks richie
January 13th, 2008 at 2:55 pm
Hi Chris
Thanks for your comment and glad you’re enjoying the site.
I’ve had a good think about what you’ve said and it really makes sense to me. The only thing that put me off your opinion at first is that the method I’m using for cold starting definitely works. In colder weather my Pajero definitely starts easier (in fact with no trouble at all) when I wait for the relay click. Having done some more reading around I can see many places where people recommend using this method, but only one or two that point out that if you have to do it this way there is probably something wrong with the plugs or bus bar.
My conclusion now is that this method of cold starting has become accepted by Pajero owners as simply what you have to do in cold weather, no matter what condition your plugs and/or bus bar are in. I always thought it was a weird idea that when using this method the glow plug light effectively means nothing. And another thing - I have the owners manual which gives you lots of information about running these trucks and when you read the starting procedure it simply says wait until the glow plugs light has gone out, even when cold starting. So I’ve added another note to my post above regarding this.
I must say many thanks to you Chris for pointing this out.
Tim
January 13th, 2008 at 1:40 pm
Hi Tim,
Just found your website, excellent stuff - I’ve had my Paj for four years and never looked back.
However, I have to correct you about your “cold start” procedure. The glow plug light goes out when the glow plugs are at the correct temperature for starting. They will take power and remain at that temperature until you hear the click that you mentioned. The click is the relay shutting off power to the plugs and at this point they will start to cool. You should start as soon as the light goes out, you’re just wasting power otherwise. However, if you have one or more dodgy plugs, the additional few seconds may help to get you started but you MUST start as soon as you hear the click - you’re better off -
- making sure the bus bar is clean
- the plugs are all in working order
Keep up the good work.
Chris
December 16th, 2007 at 12:37 am
Many thanks for dropping by Maurice. It really makes it all worthwhile to hear comments like that. I’m not just talking to myself here after all!
Glad to hear your DIY servicing is going well and good luck with the cold starting. Pump seals, glow plugs and a new starter motor should just about have everything covered!
Cheers - Tim.
December 15th, 2007 at 11:43 pm
hi there, been looking at your site since i got my pajero in october - very well presented i must say! well done! have had few probs myself though - not nice - but hey, that’s motoring for you! following the instructions you’ve published - and the ever helpful haynes manual! - i proceeded to change the oil and filter,fuel filter,air filter and grease and lube all the joins i could find. i also changed the transmission fluid and diff oil. my model is a ‘95 2.8td by the way! problems came in the seemingly common starting nd cutting out faults! new fuel pump seals,glow plugs and now a new starter - which goes on next week - will hopefully see me thru what is sure to be a cold and wet winter! thanks for the site again - it’s good to have a view similar to my own - keen amateur mechanic and new to the pajero! keep up the good work mate! M