cold starting

[mo goldie]

Hi

Just a quick one if there is such a thing lol

Just went to my bomber and Tried to start it for the first time in a month and it wont start. it seems to soak the plugs up with fuel. had the same before and it done this from cold even mouths ago and it did the same and it was Not cold weather either. don't know if any one else has had any of that sort of thing before too ?

I have tried with No choke to start and also half choke and full choke but still wont start..... take the plugs out and they are wet give them a bit of a blow lamp put them back in and she starts.

cheers Mo

[K2-K6]

More of a talk it through than explicit direction from me 

Unfamiliar with the exact method of choking, so more detail needed.

CV carbs are a little different in this aspect as cranking it with the airslides effectively closed runs the mixture rich until vacuum starts to pull them up into correct range.

Engine needs enhanced (abnormal vs warm running) mixture to cold start, an obvious statement, but if no combustion occurs, then relatively easy to siak the plugs.

In attempting a from cold start, try some more (in addition to your already attempting variation) method.

1)crank with no choke or throttle opening at all, just keep trying it to see if it even coughs. No response, then remove plugs to see if wet after that.

2) just a small throttle opening 1/16th turn constant and repeat above. Will expose airslide to more vacuum with throttle plate slightly opened. Judge as above with plugs to see if the results are any different in plug wetting.

With both, get ready to bring a small amount of choke in IF they fire to keep it running.

This just to see if you can influence it like that.

[mo goldie]

Are so that sounds Like a job to try then ? as I was just going right for full choke all the time, so I will give that a try when I get the chance to go have a go at starting it again Next time and try to start without choke then if she fires up put a bit of choke on then.

Thanks for that 

[taysidedragon]

Have you checked for a spark yet?

[McCabe-Thiele (Ted)]

You could just cheat with some cold start spray into the air filter chamber.

[florence]

I would warn against Easy Start.  I have heard, albeit anecdotally, that it removes oil from the bore and can increase cylinder wear cylinder.  Of course, this may be humbug?

[McCabe-Thiele (Ted)]

Its definitely harsh in Diesels, I had an issue with a 5 cylinder Merc engined Jeep that started to be a pig to start in the winter. The fault turned out to be seal failure in the plastic based injector pipes that were pulling in air.

I doubt an occasional use on a petrol engine would be an issue. It's surprising how little you need to use if you give it time to vaporise.

Back in the 1970s there was a rumour that engines became addicted to Easy Start type products.
.

[Bryanj]

Adicted is a myth, if you need ether there is usually a fault that needs rectification which only gets worse but isnt looked at because it starts with spray

[McCabe-Thiele (Ted)]

Oddly enough Bryan our WJ would only need the Easy start once on a day during extreme cold weather, for the remaider of the day it would start normally. One day when I opened the bonnet, I happened to see air in the injector pipe system that were starting to loose their transparency due to age. It's the same 3 part injector pipe loom used across a variety of 5 cylinder Mercs. Google search revealed the cause was O ring failure on the pipes, they did not leak fuel due to the high pressure but when cold they would let air in between the two stage fuel pressure system.

As I was still working at MB Derby I priced up the two pipe looms, trade to me they would have been around £300 ish. Armed with the Merc rather than the Jeep part number I found a set of Mopar ones from somewhere odd like Slovakia on e-bay, they came in a Mopar Bag, inside the three pipe looms came complete with the seals & caps all marked as genuine MB parts cost me £125.99!

[Bryanj]

Those price differences dont surprise me mate, O.E. seem to add a "label tax"

[McCabe-Thiele (Ted)]

I agree totally Bryan, me & my mate Ged always comment that these days it's often impossible to know the acual cost price of items.

This conversation generally takes place on our Wednesday Pub Lunch meet where we put the world to rights taking a lot of opinionated crap, adjoining tables often join in on our discussions. Who says only the French have a Cafe type Society.

[Bryanj]

I am not predjudiced-----------i hate everybody!!!!

[mo goldie]

Hi Guy`s

Just anther update of today, went out to try and start the Bomber it still would not start  so took the spark plugs out and they were soaked in fuel.... as soon as I done and Alan Milyard trick of the blow lamp on them put them back in she started right up .....so Must mean for some reason that is making the the carbs..... flooding the bores 

[mo goldie]

Well I have just got the bomber out to give it a look over and still got the problem with the starting from cold. if it run on the day it will start first push on the button for the rest of that day. leave it over night and get the same thing it wont start 

take the plugs out and they are wet.....do an Alan Milyard on them with the blow lamp put the plugs back in and she starts and run fine for the rest of the day, its got all the right Jets in Etc .... but still think it runs to rich tho well richer than I would like 

just cant work out why it will Not start from cold....also tried No choke half choke full choke still don`t start.

Need a lay down I Think............ as don`t know where to go next ?

[McCabe-Thiele (Ted)]

In the absence of knowing the engine history, my first thoughts are do you have good compressions?