Weird ignition problem.

[suprafredde]

So here is the deal.
Checking with timing light:

Plug 1 misfires alot.
Plug 6 flashes evenly.

Change coil 1&6 with 3&4, same as above.

Change wire on no1, its the same.

Change sparkplug, still the same.

Cant think of something else to try. Any ideas???

suprafredde

 

[Moy]

check your #1 injector.

 

[mkiiichip]

^What?

OP, are you trying to solve that slight miss, many 7m's have at idle?

#1 and 6 always spark together, so if 1 is missing so is 6. There is a lot of interference around the #1 lead, thats why i always used #6 for checking timing and such. I bet if you put a longer wire on #1, and moved the light pickup away from the other wires, your light will get a more stable reading.

 

[suprafredde]

The difference according to the timing light is huge and is not a slight miss. Say 20-40% ignition loss on #1.
It also screws up my a/f alot and the car doesnt run right.
On my setup the number 1 lead cant get less interference.
But I will try that tomorrow and put a longer lead on but dont think that will affect much since there is still a noticable missfire not only seen by the timing light.
Thanx though, and I hope more suggestions will come. Here is a pic of my setup.

suprafredde