I would be surprised if it was the lummy itself. Could be a connector of course. Or plugs even. Coil, HT leads. Then there fuel and air leaks. Tappets are sounding tappity.
I'll start looking properly.
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| Miss fire http://www.international2cvfriends.com/forum/viewtopic.php?f=7&t=6277 |
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| Author: | Roger V [ November 20th, 2019, 10:56 am ] |
| Post subject: | Miss fire |
The Shed's engine miss fires if I just open the throttle a little. It idles nicely, and runs ok once you get past the rough spot. Can't say I've noticed it when driving as I would normally give it more beans. It has luminition ignition. A Harley type (black) coil. Any thoughts! |
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| Author: | Ianredspecial [ November 27th, 2019, 12:59 pm ] |
| Post subject: | Re: Miss fire |
Full throttle everywhere? You probably do that anyway though. |
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| Author: | Jonathan [ November 27th, 2019, 3:41 pm ] |
| Post subject: | Re: Miss fire |
Well, my 123ignition gave up the ghost two weeks ago, after 16+years and close to 200k miles. I've bought a new one from ECAS and there's an additional piece of paper that states that the standard 123 will fail if a 'super coil' is used, so maybe it's a thing with Luminition too. I don't have a 'super coil' fitted. |
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| Author: | Roger V [ November 27th, 2019, 6:22 pm ] |
| Post subject: | Re: Miss fire |
I would be surprised if it was the lummy itself. Could be a connector of course. Or plugs even. Coil, HT leads. Then there fuel and air leaks. Tappets are sounding tappity. I'll start looking properly.
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| Author: | ken [ November 27th, 2019, 7:52 pm ] |
| Post subject: | Re: Miss fire |
Roger, not sure if I've already asked this, but has the carburettor been rejetted yet? Any hesitation/ 'almost' misfiring due to a weak mixture on the primary choke will be much more pronounced in cold weather. |
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| Author: | Roger V [ November 28th, 2019, 12:04 am ] |
| Post subject: | Re: Miss fire |
Hi Ken Yes you did back in late February. It has a dyane cowl and pipework. You suggested 110 primary jet. Not convinced its fuel, but you never know.
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| Author: | AZL57 [ November 28th, 2019, 9:24 am ] |
| Post subject: | Re: Miss fire |
is the little injection pump on the carb working? |
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| Author: | Roger V [ November 28th, 2019, 10:14 am ] |
| Post subject: | Re: Miss fire |
That appears to work ok under normal driving conditions. This only happens if I open the throttle a little bit. I only noticed it because i was trying a new ignition system and it was running badly. I swapped it back to compare and there it was. |
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| Author: | Roger V [ December 8th, 2019, 1:29 pm ] |
| Post subject: | Re: Miss fire |
I think I may have resolved this, this morning, but we wIll see. For the new ignition system I am currently fighting with, I have coil on plugs (VAG bosch 036 905 715).I used the same ground point on the bulkhead, as the regulator ground. When on the old system (lumenition), I noticed the max voltage had risen slightly when reving the engine. I decided to move the cop ground to the gearbox, and make good the regulator ground. Result The mis fire has gone, and I have a rock solid idle! Still the new system to sort though. I've ordered some resistor type spark plugs.
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| Author: | subarupete [ December 8th, 2019, 3:03 pm ] |
| Post subject: | Re: Miss fire |
Hi Roger, Which ignition system.? Need a cop driver design/circuit?? Have 2 cop units with connector plugs only 2 wire. About < 1 ohm each, loath to try them in the 123 ignition as they state min off 1.5 ohms Any hints Cheers Peter |
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