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 Post subject: engine dropping onto 1 cylinder
PostPosted: Wed Apr 28, 2021 9:23 pm 
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Joined: Sat Apr 28, 2018 9:31 pm
Posts: 5
Location: Ireland
model: 750 Paso
year: 1990
Hi
since i put the 906 on the road its been dropping on to 1 cylinder, and after a few seconds it will pick up and run on both of course it always happens just before I go into a bend and picks up halfway round, makes life interesing. tried to check which cylinder was dropping out but as it only occurs for a few seconds at a time it is virtually impossible. At the moment I am waiting for new plugs caps and ht leads to rule out the easiest potential scource of problems.
As it is probable that plugs and ht leads wont cure the problem,i think if it was either the misfire would last longer, then I will need to understand the ignition circuit better.
first, can someone explain how 1 pickup manages to give sparks to both coils, does it run a wasted spark.
second, what should the primary resistance of the coils be, according to manual should be 0.34ohms, but read on here that people are using coils of resistance of 3.5 or 5 ohms
and finally (for now) has anyone used the alternative digiplex fitted to theLancia Thema 16V or Fiat Croma 1600
Yosemite


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 Post subject: Re: engine dropping onto 1 cylinder
PostPosted: Sun May 02, 2021 12:20 am 
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Joined: Wed Oct 06, 2004 12:00 am
Posts: 326
Location: Nottingham, UK
model: 906 Paso
year: 1989
I replaced the ignition coils with ones from an Aprilia twin, 5 ohms resistance. I did this after running the Paso at the racetrack and picking up a misfire; due to over-driving the Digiplex. Your cutting out does sound like an electrical problem.


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 Post subject: Re: engine dropping onto 1 cylinder
PostPosted: Mon May 03, 2021 7:28 pm 
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Joined: Thu Nov 29, 2007 2:38 am
Posts: 334
Location: UK
model: 907 I.E.
year: 1990
The digiplex can be replaced with the IGNITECH, i am not sure if it will be plug and play , but in kn ow it is feasable and the Digiplex Flywheel will allow a much better mapping than the Kokusan Flywheel (limited to 32degrees) to teh point that you could even fuit a MAP sensor and mimic the digiplex Mapping.

It soumds you have a sort of contact , I woul go through every connector related to the ignition, tighten the contacts with a small scredrivers, then lubricate the connectors and refit , most likely is just a connector getting loose a little bit overtime.


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 Post subject: Re: engine dropping onto 1 cylinder
PostPosted: Tue May 04, 2021 1:02 pm 
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paso grand pooh-bah

Joined: Thu Jun 21, 2007 12:00 am
Posts: 1497
Location: Gothenburg, SWEDEN
model: 907 I.E.
year: 1991
https://bradthebikeboy.blogspot.com/201 ... t-for.html

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907 I.E. -91
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