Jumping & misfiring

[smallcox]

 Hi Worm,

 Giving yourself electric shocks maybe considered not normal

      lol

   Ignition coils produce high voltages 5000-15000v is common, so yes this is what you are feeling.

 

[Worm]

LOL Thank you, im just being a spanner then Going to order the condenser on the coil as recommend first and see if that resolves it.

[Worm]

Is it normal to have a condenser attached to the coil as well as the condenser on the side of the distrubitor??

[Worm]

Fitted new condenser today, not made any difference it still jumps around . I did notice when i turned my ignition off that the engine ran for a couple of seconds until it stopped, i guess this is a slight timing issue maybe??? but it has only done this twice now. Do people think the coil is then next to replace or should i take the fuel pump off first, if i do take pump off what should i find wrong with it, will it be obvious?. thanks for any advice on this

[Darrell]

try changing plugs. The engine running-on like that sounds like the plugs are so hot they carry-on igniting the fuel once the engine is switched-off.
Jumping and missfiring could be points, but then could also be fuel as when they run lean they tend to missfire.
Jumping when? Under load I presume? sounds like a careful carb clean, replace fuel filter points and plugs is in order.
I find coils either work or not.

[Darrell]

I was going to comment that it must sound like my mother-in-law...

[Worm]

Thanks for your reply, yes its under load when it jumps so if i back off the accelerator and re apply less throttle it seems to settle down and temporally recover. I will probably remove the fuel pump have a look then if that looks ok i will take the carb off. I ve checked the timing with a strobe light, this was a little before the 10 degree advance mark, so i have move dizzy so it is more or less bang on but this made no difference when i took it for a test drive. 

[Worm]

Does this coil look correct, as in the Haynes Manual there is no small object to the right which looks like a condenser for the coil, help does anyone know if this should be on it and what will happen if i remove it?

[thepuddlejumper]

I think this is the condenser, usually fitted on the side of the distributor. Some people fit them at the coil end to keep them away from the heat of the engine as the newer ones tend to fail on a regular basis.

[Worm]

I think this is the condenser, usually fitted on the side of the distributor. Some people fit them at the coil end to keep them away from the heat of the engine as the newer ones tend to fail on a regular basis.

Thats very odd as the dizzy has a condenser already, is this right to have 2 condensers, maybe this is the problem, but i dont want to remove it from the coil and run the car to find out i have caused more problems/damage. Also the coil condenser if that is what it is is connected to the other terminal! The condenser from the dizzy is attached to the black wire on the left of the coil (-) negative, does this seem normal to have this set up of 2 condensers one on the (+) and the other on the (-). Any suggestions?? :undecided2:

[Pete126]

The one the coil is probably a radio suppressor. have you replaced the condenser on the distributor

[Worm]

The one the coil is probably a radio suppressor. have you replaced the condenser on the distributor

Yes i replaced the condenser on the dizzy today, it was slightly different to the old one in the fact that it had a prong electrical end rather than a larger round spade connector like the old one and i had to fit it upside down. What does a radio suppressor do?

[Pete126]

Try disconnecting the one one the coil its not needed if your using good quality suppressed plug leads, see if that makes a difference, the radio suppressors were usually fitted if copper cord plug leads were used, they stop the ticking interference usually on MW/LW Radio's They were also fitted to the dynamos [-/

[Worm]

Removed and striped fuel pump all seems ok. Fuel pump push rod could not remove without removing the alternator so didn't but it had a 3mm of movement under hand crank and protruded about 1.5mm out from spacer as the Haynes suggests, tested pump via glass jar and fuel is pumping out nicely. Removed carb and took top cover off, all looks spotless and filters were clean still, blew with can of air all the jets and brass things that i could see, awaiting replacement gaskets to refit carb.
Noticed on ebay that there appears to be 2 different types of condenser for the 126 depending whether a Marelli or Zelmot dizzy is fitted! The condenser i was sent was a fit all Fiat 500/126 so maybe this is still the problem if it is not a fit all 126 condenser at all. I assume from reading the Haynes manual that i have the Zelmot dizzy as the car is 1983 and the Haynes states that the Marelli was used 1985 onwards but doesnt give a name for pre 1985 dizzy i have picked this info up else where, if someone could confirm dizzy info dates manufacturer that would be of reassurance as i am considering ordering a different condenser as stated in a previous post the condenser didn't fit like the old one anyway.

[Worm]

I assume from reading the Haynes manual that i have the Zelmot dizzy as the car is 1983 and the Haynes states that the Marelli was used 1985 onwards but doesnt give a name for pre 1985 dizzy i have picked this info up else where, if someone could confirm dizzy info dates manufacturer that would be of reassurance as i am considering ordering a different condenser as stated in a previous post the condenser didn't fit like the old one anyway.

Having spoken to some one helpful on ebay selling the condenser and re read the description in the Haynes the 1985 onwards is a 'Marelli electronic rotorless' and pre 1983 is still a Marelli though.