Bedford CF-UK Message Board Logo [Home] [Search] [FAQ]
Bedford CF-UK Message Board > CF Questions > Not Starting when warm?
[Private Message] [Register] [Profile] [Member list] [Log-in]
Who's Online:
There are 0 member(s), and 1 guest(s) online.
 
[Printable Version] [Post Reply]
Author Message
Anon
Deleted
Posts :
Location :
Status    : Offline

Not Starting when warm?

Hey all.
Finally the ol 350's back on the road. Only a 1000 last year, flew thru the MOT!
Excited as stink, took her out for a 30 mile burn, ran like a dream, no overheating, even with it being 29 degrees outside. Only prob though, was when I stopped and turned him off, then after 2 mins tried too start again, it wouldn't fire.
An hour later, tried again, started at once.
Any ideas as why he wouldn't start when warm? On the button when cold!
It's great to be out on the road with " Ned" again!
He's a 1981 2.3 slant, with just 71500 miles.
Cheers
Paddy.

----------------------

Mon 15 Jul 2013 @ 08:30 Edit this messageQuote this messagePMQuote this message
Gethin
Card Holder
Posts : 462
Location : east lancs
Status    : Offline

its probably down to fuel vaporizing causing an airlock.

next time check to see if you have fuel in the filter.

you could have a week fuel pump that's even weaker when hot.

Mon 15 Jul 2013 @ 09:03 View Gethin   Email Gethin   Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

Poor hot starting can also be due to exhaust valve clearances closing up. I've had that issue on a few bikes before - but in this hot weather Gethin's suggestion is the most likely. I have a electric fuel pump with a manual prime switch so I can ensure the float bowl is full prior to starting. She starts on the button straight away.
Mon 15 Jul 2013 @ 13:28 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

I had a very similar problem to yourself. We were touring the Highlands, and it kept happening that I'd stop the engine (usually to fill up at a petrol station), and then the thing wouldn't start! It turned out that the problem was a worn float in the carb (I think), which meant that it was very easy to flood the thing with fuel, although this was compounded by the fact that it poured for the first 5 days we were there, and the dampness wasn't helping either!

If we left it about 45 minutes or so, the fuel would evaporate, allowing the engine to start again. At the following MOT, I got our mechanic to strip down the carb, and rebuild it, and now it's working sweetly!
Mon 15 Jul 2013 @ 13:51 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

Many thanks to all for suggestions, I guess a few small jobs in hand then, or just deal with the quirk!
I do get the occasional splutter and back fire while cruzin at around 45-50mph, usually settles down tho. Hope everyone's making the most of this weather : )
Cheers
Paddy.
Wed 17 Jul 2013 @ 16:53 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

I also had the same problem - it somehow defies logic and is deeply frustrating. As well as checking the carb float, also check the fuel level inside the float chamber.
Fuel starvation from a weak fuel pump can certainly be to blame - I fitted an electronic pump to replace the mechanical one. You should also plumb in a Filter King which will not only keep out crud but act as a regulator to make sure you don't get the opposite problem of too MUCH fuel coming through to the carb.
Also check the fuel lines are routed well away from the engine - if not, you are more likely to get vapourisation.
Even after all that I have occasional hot start problems. On my CF, flooring the accelerator during cranking usually works.
Thu 18 Jul 2013 @ 11:27 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

Hot no start

Hi Ilkaleia,I had a similar prob.After alot of swearing,the prob was the coil.When you stop the engine,put your hand on the coil.If it's to hot to hold it is possibly braking down.I know people say a coil either works or not,this does happen. Cheers+Beers,Jim.

----------------------

Thu 18 Jul 2013 @ 21:57 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

Thanks Jim - good steer. You've reminded me that my father who was a Riley RME man often said the coil is overlooked and a good one is worth its weight in gold.
Think I will replace it anyway with a Lucas sports version or similar. Does anyone on here know what spec or even part number is required I wonder ?
Sun 28 Jul 2013 @ 11:08 Edit this messageQuote this messagePMQuote this message
Time in GMT
[Post Reply]
New posts since your last visit Administrative Functions: Open/Close/Delete Thread / Move Thread
Old post

Forum Jump:

Back to the CF-UK Homepage ][ Email CF-UK

Powered by FunkBoard vCF0.74c