can someone explain a starting conumdrum, please?

Post by **ermie571** » 10 Mar 2008, 10:58

Hi,
could someone who understands how the iginition system works on a carbed LPG 2.1 please tell me how to sort the following out?

Symptom..

lots of cranking before firing. Bit once started, EVEN IF IT IMMEDIATELY CUTS OUT it will restart on the turn of the key.

In the moning, I give it the first turn, full throttle, till it clicks. Turn key back, and repeat. This should have given two good slugs of gas to the engine, yes? Crank, energetic cranking from starter.... Turn off, try again. Turn back, try again...cough ans splutter, then it runs. Hold on the accelerator a second or two, then it will idle - lumpy if cold.

Its almost as if it is only getting fuel when it is cranking....How can I check this?

New leads. New plugs. New rotor arm and cap. Dizzy in 180 out we think, timing needs checking.

But, as I have said, once it has started once, it performs fine, till it is left to sit in very cold again. Even after 8 hours in car park it takes less cranking to start.

so, where do I need to look?

thanks
Emma

Post by **andysimpson** » 10 Mar 2008, 13:22

Try giving th coil a 12volt feed before cranking and see if it makes a difference.

Post by **toomanytoys** » 10 Mar 2008, 13:55

2 "primes", might actually be too much... therefore its too rich to start..

Or if the idle mix is set very low.. 2 isnt enough....

if it runs once going, then it cant be the dizzy 180 out of the cap and leads etc...

Post by **Hacksawbob** » 10 Mar 2008, 14:57

Are you starting on LPG? then pumping the accel pedal wont make any difference.

Post by **Ian Hulley** » 10 Mar 2008, 15:08

Hacksawbob wrote:Are you starting on LPG? then pumping the accel pedal wont make any difference.

Gently putting the pedal to the floor before cranking does put the choke on, gas or no gas.

Ian.

Post by **ermie571** » 10 Mar 2008, 15:18

Thanks for replies. Will investigate the idle mix as well.

Em
x

Post by **Ian Hulley** » 10 Mar 2008, 15:20

ermie571 wrote: Will investigate the idle mix as well.

Em
x

Why ? Have you been tinkering ?

Ian

Post by **toomanytoys** » 10 Mar 2008, 15:23

Dont start turning things, at least not witout marking there position and or recording how many turns out they are before "adjusting", you then have a referance setting to go back to when it doesnt work...

Post by **T'Onion** » 10 Mar 2008, 15:45

does it do the same on petrol ?

Post by **ermie571** » 10 Mar 2008, 16:08

No - not tinkered or touched anything!!! Not going to, neither! It starts, albeit after turning for a while,,,,,but at least it starts!

It needs a timing check before anything else...and when the "simple" bits have been sorted, its off to a gas analyser to get the gas right!

But I do run it quite lean, so that could be an issue too.

T'onion, not sure abouyt petrol.....it generally don't like the stuff. It won't run on petrol from cold, but if I remember correctly it starts ok, but dies straight away. To run on petrol, the engine has to be warm, then it is fine!

Emma
x

Post by **T'Onion** » 10 Mar 2008, 16:49

You need to get it run well on petrol for it to run on gas .. sounds like its in need of a tune up , try getting it running on petrol sounds like an electrical problem to me, or a vacuum fault

Post by **Mocki** » 21 Mar 2008, 12:07

have you sorted this yet?
sounds like the choke is shutting too far, and stopping the gas getting down there