Misfiring and sluggish acceleration when exiting traffic jam

[jalexquijano]

Just installed a coolant reservoir tank to my champion 3 row radiator. It´s working better now. Anyway, the car is still presenting some sluggish acceleration after getting  stuck on a 5 to 10 mins short traffic. Can someone explain to me why if i pull out all the NGK BP6ES spark plugs and brush the carbón off, the car accelerates fine? I have both of my carbs set to 3 turns clockwise. If i lower it more, i start loosing power at 1st gear.

[Mark Maras]

 Carbon on the plugs acts like an insulator. What does it feel like when it's at 2 1/2 turns?

[jalexquijano]

ill be cleaning them today and lowering the mixture to 2.5. Ill let you know.  Thanks Mark!

[jalexquijano]

should i take all the spark plugs out and clean them once again?

[Mark Maras]

 Yeah, clean them again. You've already discovered how it will run with fouled plugs. New plugs would be better.

[jalexquijano]

On 2/10/2017 at 8:40 PM, Mark Maras said:

 Yeah, clean them again. You've already discovered how it will run with fouled plugs. New plugs would be better.

Left to right in the following order 6-5-4-3-2-1. I pulled them out yesterday after the long idle on saturday evening traffic. I even noticed that the spark plug gap was reduced from .031 to .028. Is this normal? Too much heat is causing this???

[Dave WM]

Get some new plugs, gap them, while you have the old ones out do a compression check, write down the results for each cylinder, put the new ones in drive it for a week, take pictures of plugs and post.

 

FI or Carbs?

Edited October 5, 2017 by Dave WM

[Zed Head]

Those plugs don't really look that bad.  All six electrodes are fairly clean and look like they've been working.  #4 looks worst but still looks like it was firing.

[jalexquijano]

2 hours ago, Dave WM said:

Get some new plugs, gap them, while you have the old ones out do a compression check, write down the results for each cylinder, put the new ones in drive it for a week, take pictures of plugs and post.

 

FI or Carbs?

Gap how much?? Using petronix ignitor and flamethrower coil. 2 Su carbutetors

[Dave WM]

what ever the FSM recommends. I don't know if using aftermarket products changes things but if they do, then I assume it would be covered in the documentation that would come with the after market products.

[Mark Maras]

4 hours ago, Dave WM said:

Get some new plugs, gap them, while you have the old ones out do a compression check, write down the results for each cylinder, put the new ones in drive it for a week, take pictures of plugs and post.

 

 

 Good advice. I'm surprised at the color variation in the plugs. Especially #5 and #4 since #6, #5, & #4 all run off the rear carb. @jalexquijano Is there always that much difference in #5 & #4 plugs?

[jalexquijano]

Just drove the car yesterday with new plugs at 2.5 turns clockwise both carbs. It lacks some power at 1st gear though. I think it needs some more fuel at the carbs.