19 replies to this topic

[propjock]

I just changed the plugs, wires and distributed along with the igniter coil.
When I check the plugs to tune the carb three plugs look rich but the 4th one looks like that cylinder is running very lean. I have set the timing already and checked the compression on all 4 cylinders and they are good.

Any ideas?

[68+86auto]

Can you add photos of the plugs?

Edited by 68+86auto, 14 February 2024 - 02:29 AM.

[propjock]

In order 1-4
4 in the problem

[propjock]

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[propjock]

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[timmy850]

What type of plugs are they?

 

Is the distributor cap and rotor arm in good condition?

[propjock]

What type of plugs are they?

Is the distributor cap and rotor arm in good condition?

Brand new distributor, coil, wire and plugs

[propjock]

Ngk
Iridium

[timmy850]

What spec / number plugs did you buy?

[propjock]

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[propjock]

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[timmy850]

Ok so it’s the kit from Jet motors. Is the coil/distributor wires up to a full 12v or are you using an existing ballast wire feed?

https://www.jetmotor...gnition-upgrade

Is this a new issue that’s come up since the new parts were fitted?

Edited by timmy850, 14 February 2024 - 06:23 AM.

[Midas Mk1]

Distributor or dissy cap? All timed in correctly?

[Steam]

Is it a crappy chinese distributor?

[Lplus]

What is the fuel system?  Carb? SPi?, MPi?   The plug order seems to be 2, 3, 1, 4 from rich to lean with both the inner plugs being richer than their adjacent outers.  Fuel/air mixing problems in the manifolds?  Minor air leak?