L300 wont start

Does your Mitsubishi L300 make a strange noise? Need wheel alignment specs?
pandaselecta
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L300 wont start

Post by pandaselecta »

Bet you getting sick of me by now, but its nearly finished (i hope) :-D.

The Delica has been rebuilt (new belts and tensioners) by a Mitsubishi mechanic, the battery is good, there seems to be fuel (strong smell of diesel when cranking it over), the glow plugs are good, and there is power getting to the glowplug bar thingy (put spare plug from bar to earth)

It still wont start. Does anybody know any other reasons it would kick into life?

The engine does actually turn over, but the turning sounds a bit fast, and a lack of a compression tester means i cant see if that is the problem (been told it could be stuck pistons rings, but wouldnt that mean the engine couldnt turn?)

Even the most far fetched idea would be considered, just chuck them this way :-)
Growing old and growing up are two totaly different things. One is inevitable, the other is optional ;D
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thedjjack
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Re: L300 wont start

Post by thedjjack »

Turning too fast sounds like a compression problem.

You cannot start a diesel without compression. Compression is what ignites the fuel.

Valves timed properly? Stuck ring means that they are stuck to the piston and not filling the gap.

Leak down test is best to see where the compression is lost.

You need to know if you have compression. then you can figure out if it is a fuel problem or a compression problem.
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thedjjack
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Re: L300 wont start

Post by thedjjack »

Just read your old post and the motor had a broken timing belt? If so:

Pull the head. Look for stuck bent valves, damaged rockers, cracks, broken guides, damaged/destroyed pistons/cylinders.
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Spearo
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Re: L300 wont start

Post by Spearo »

Occam's Razor suggests that if it ran before the repairs were done, then something got put back together the wrong way. My own experiences reflect this ie: I work on one of my bikes and then immediately have electrical problems. Or rebuild a working carb and the bike wont start. Probably it was me! True every time.

I'd start eliminating by the most obvious, one by one, until you get it.

Cheers,
Erik
"I tell you, we are here on earth to fart around, and don't let anybody tell you different" - Kurt Vonnegut
pandaselecta
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Re: L300 wont start

Post by pandaselecta »

thedjjack wrote:Just read your old post and the motor had a broken timing belt? If so:

Pull the head. Look for stuck bent valves, damaged rockers, cracks, broken guides, damaged/destroyed pistons/cylinders.
everything was checked out by our mechanic, and everything was given a clean bill of health :)

i should have also pointed out that when i turn the key, there is a single 'click' noise behind the drivers seat, but when i turn it to start it, not only does the engine turn, but there is a click....clickclick....click....clickclick noise too :?
Growing old and growing up are two totaly different things. One is inevitable, the other is optional ;D
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TardisDeli
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Re: L300 wont start

Post by TardisDeli »

Ah ha, the click click is the key here, we call it the Morse Code Click. Very Common problem.

Assume you have a diesel.

You need to replace the Temperature Sensor, yes it is the proper name for the genuine Mitsubishi part, it is a 2 prong metal plug, maybe the size of my girly baby finger, screw threaded on the top front of the engine cover, which senses coolant temp. If coolant is cold (or if the sensor cant sense properly) then it says ooohh its very cold outside so I will tell the glow plugs to click click click on until I tell them to let the engine start. But ooops I CAN'T say its ok to start the engine because the coolant temp probe still says its is very cold (ie no reading on the temp sensor so we must be in siberia) so you glow plug guys better click click some more.

There is also a single prong plug, a couple inches away, which is not a problem, as it only sends the info to your dashboard guage.

If you do manage to get the engine started, by way of long cranking time and sometimes a bit of your foot pressure on the diesel fuel pedal (not floored, just sort of halfway pressure on the fuel pedal), then the engine will cough madly and the whole vehicle shakes and will splutter black smoke out the exhaust for about 45 seconds, and the click click will continue for about 2 minutes until it stops (because the engine is warming the coolant). But Then when you drive away, the click clicks happen again, as you now move cold coolant thru the systems.

This Temp Sensor is not a problem in summer usually, but come the autumn you notice a lot more people posting on the forum with the hard start and clicking problem.

To prove this easily, can you park inside a toasty garage, and put a heater under the radiator and engine area so that the whole thing is perhaps 65 degrees. Then if it starts easily you know your solution. I don't know what temp it really needs to deactivate it. I also keep meaning to test the sensor to find what the electrical load should be through it to test it, but havent, and I do not know anyone who has. We just buy another sensor, I think the ones in ours are all over 15 years old, they don't seem to be a problem once we replace them. I suppose another test could be to drain all your coolant and heat it on the stove then refill radiator but that would be an extreme situation. Can you borrow a working one from a buddy, easy to install in seconds, he'll never know if you do it while he's in the pub.

Cheers, Christine.
Christine
Of The TardisDeli My TardisDeli travels thru time and space. Our house is nicknamed the TardisDeli Motel, as so many delii owners visit to share delii stories.
pandaselecta
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Re: L300 wont start

Post by pandaselecta »

is this the temperature sensor......

http://shop.ebay.co.uk/?_from=R40&_trks ... Categories

also many thanks for the detailed help :)
Growing old and growing up are two totaly different things. One is inevitable, the other is optional ;D
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Re: L300 wont start

Post by Kwales »

If it is faulty glow plug relay or temp sender, get a lenght of wire, hold one end on your battery poss post and the other on your glow plug rail for 10 seconds and then crank your engine. If it doesn't start then it could be faulty glow plugs or you've put your timing belt on a couple of teeth out.
Also check your got a good clear airflow from your air filter.
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TardisDeli
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Re: L300 wont start

Post by TardisDeli »

Nope, your photo from ebay is not all it. It is a metal tube, shaped like a small glow plug (like a very tiny spark plug from a gas car). Maybe 2 or 2.5 inches long, width size of female baby finger.

http://www.alibaba.com/product-gs/35222 ... ENSOR.html (no idea if this part number is correct, but the picture is similar. Ensure you get for your year and model, if problem I can phone our local garage and get the mitsu genuine part number ... do not use imitation as very precise). Notice how this one has 2 blade prongs on the top, you could check yours to see if cleaning the prongs help, but I have never seen that trick help, just need to replace the unit.

Also, as Kwales says, check air filter (just remove it for starting test) as usually if it clogs will restrict engine from starting (mine can go from starting and running fine today, then tomorrow it just decides it is clogged even though I can still see thru the filter mostly and now will not start --- cough cough cough).

But the click clicks are a definite indicator to the water temperature sensor and I have seen this occur on several L300's.

It is simple to undo and swap in another, that's why I wonder if you have another L300 around that you can swap in for just one minute.

Cheers, Christine.
Christine
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Re: L300 wont start

Post by TardisDeli »

I just found a similar posting to what I am talking about... on the UK site:

http://www.mdocuk.co.uk/forums/viewtopic.php?t=15668
Title is ... temp gauge issues

I think they are talking of the same thing, but I didnt read it all yet.

Remember, the plug I am talking about has 2 blades, the single blade plug that they are confused about is ONLY to send info to the dash guage, we don't care about that until after you can get your engine to start and run.

Christine.
Christine
Of The TardisDeli My TardisDeli travels thru time and space. Our house is nicknamed the TardisDeli Motel, as so many delii owners visit to share delii stories.
pandaselecta
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Re: L300 wont start

Post by pandaselecta »

Many thanks for the help. I have rang my local Mitsu dealer and they dont seem to be bothered if its not a UK supplied car, and they want a vin number (wont work with the one i gave).

So if you could get the part number for me please then at least i can ring around and see who has one. The delica is a 1992 Exceed with the 4D56 engine and automatic box.

Have one of my virtual homemade shandys as thanks :-D
Growing old and growing up are two totaly different things. One is inevitable, the other is optional ;D
pandaselecta
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Re: L300 wont start

Post by pandaselecta »

Managed to get a very strong heater to put under the delica, and even though the computer said it was 19C in the garage, it still wont start. So its looking more and more like the temperature sensor :)
Growing old and growing up are two totaly different things. One is inevitable, the other is optional ;D
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thedjjack
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Re: L300 wont start

Post by thedjjack »

19 C it should start. turning too fast still makes me think no compression.

Disconnect the glow plugs jump them direct with power for 5 sec and if it does not start you have bigger issues....
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Re: L300 wont start

Post by jessef »

thedjjack wrote:19 C it should start. turning too fast still makes me think no compression.

Disconnect the glow plugs jump them direct with power for 5 sec and if it does not start you have bigger issues....
x2

From what I've gathered in your other posts, my assumption is the timing is off. It won't start otherwise. :M
pandaselecta
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Re: L300 wont start

Post by pandaselecta »

Someone off a different forum is sending me his diesel compression tester to try out, will be picking up from the postal office tomorrow :)
Growing old and growing up are two totaly different things. One is inevitable, the other is optional ;D
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