Misfire and lack of power when hot

[richardthestag]

Yes I think its a Power spark kit that Stag Weber use. That was the issue with mine, I had to file out the plate fixing holes to get the correct adjustment. This is how I found it, the gap is supposed to be constant at approx 1 mm, I had no further adjustment until i elongated the fixing plate holes.

Roger S

Powerspark in a SW distributor that failed on me, ended up going pertronix, coughed and then failed. Within 50 miles of first start up

https://youtu.be/Cxxy4q0N11Q

This video was done before I realised exactly how crap rotors and caps could be. I do not recommend rotors with rivets on them!!!!!

Like with powerspark and Pertronix and when fitting the unit over the top of the distributor cam, you need to get a rotor compatible with the lucas 35dlm8 distributor, rotors are very different between points and EI especially so on the Stag distributor. The wrong rotor could make the dizzy cap wobble

[richardthestag]

here you go, found the footage of the two types of rotor arm

https://youtu.be/nr1_jFssay8

[bullstarz]

I have had the lumenition start to go one of the sign is the rev counter will flick.

Check the plugs and see what they look like as way too rich or too lean will cause the same issue.

In 20 years of being a qualified mechanic i have never been told " remember that 90% of ignition faults are fuel related and vice versa" its just isn't true.Two totally separate systems.

[richardthestag]

I have had the lumenition start to go one of the sign is the rev counter will flick.

Check the plugs and see what they look like as way too rich or too lean will cause the same issue.

In 20 years of being a qualified mechanic i have never been told " remember that 90% of ignition faults are fuel related and vice versa" its just isn't true.Two totally separate systems.

Sorry about that

[jbuckl]

Powerspark in a SW distributor that failed on me, ended up going pertronix, coughed and then failed. Within 50 miles of first start up

https://youtu.be/Cxxy4q0N11Q

This video was done before I realised exactly how crap rotors and caps could be. I do not recommend rotors with rivets on them!!!!!

Like with powerspark and Pertronix and when fitting the unit over the top of the distributor cam, you need to get a rotor compatible with the lucas 35dlm8 distributor, rotors are very different between points and EI especially so on the Stag distributor. The wrong rotor could make the dizzy cap wobble

I watched the video. Too light on actual information. Yes, there’s bad quality parts available, agreed.
However the height difference isn’t related in any way to points or electronic ignition is it?
did I miss something?

[jbuckl]

In 20 years of being a qualified mechanic i have never been told " remember that 90% of ignition faults are fuel related and vice versa" its just isn't true.Two totally separate systems.[/QUOTE]

That’s a joke.
my neighbour’s stag recently suffered a suspected ‘fuel pump’ failure..::asked for help to fix the no start condition.
Turned out to be a no sparky situation
hence the joke.
lovely stag, lovely neighbour, but we are both going a bit deaf, myself having been a previous engine dyno technician in the 80’s & 90’s so can’t hear the fuel pump ticking as well as a few years ago now!

[richardthestag]

I watched the video. Too light on actual information. Yes, there’s bad quality parts available, agreed.
However the height difference isn’t related in any way to points or electronic ignition is it?
did I miss something?

did it years ago before I got into doing yootoob

the height video I did upload last night because I found the vid

https://youtu.be/nr1_jFssay8

[Dave Harris 10]

Hi, further to this post I (or rather Aldon Automotive in Brierley Hill West Mdlands, who did a great job) have managed to get to the bottom of this issue and I thought I would share it as it is quite unusual as to what the root cause was. In the bottom of the float chamber on the Stromberg carbs is a brass & plastic plug. The plastic part of this assembly acts like a kind of well that the needle valve jet sits in. On this plastic part are four tabs and one of these had broken off and under load when accelerating or going uphill this tab was being sucked up onto the needle valve thus cutting the fuel supply off to the one bank of cylinders. I have attached a picture of said plug and broken plastic tab so you can see what it is. Hope this could help someone if they have similar problems and may not be aware of this one.

[wilf]

Well, that was well diagnosed!

[dasadrew]

still trying to work out how something gets sucked up onto the needle valve. Maybe floating in the path of the jet?

[wilf]

Was how I read it, tbh.

[garyf]

I had a bloody misfire when decelerating
turned out to be a Ebay rotor arm in the end

[dasadrew]

I had a bloody misfire when decelerating
turned out to be a Ebay rotor arm in the end

There are kids out here who pay good money to get a misfire on the overrun on their Golfs!