89' 150 gt not firing 2 plugs?

[j150stlcem]

I have a 89 150 gt crossflow that only fires in 4 out of 6 cylinders. This motor was made with only one powerpack for the 6 coils. I have tested start switch, ignition coils, swapped power packs (had bought new while back). I am baffeled. Any help greatly appreciated!

 

[MikDee]

Re: 89' 150 gt not firing 2 plugs?

Question, are you getting a good spark to the plugs, and they're not firing, OR, are you getting a no spark condition at all to the plugs?

Because, maybe the plugs are getting wet inside under pressure, due to a slight head gasket leak?

 

[j150stlcem]

Re: 89' 150 gt not firing 2 plugs?

I have a good strong spark at 4 of 6 plug wires. I also swaped and tested plugwires, coils and leads from powerpack still 2 not showing spark. Thanks!

 

[MikDee]

Re: 89' 150 gt not firing 2 plugs?

I'd be checking for water intrusion on those 2 cylinders, it's the only thing that makes sense, I doubt the coils or power packs would eliminate firing on just these 2 plugs, unless the spark plugs are bad, (but I bet you prob. replaced them already) by the way, how's the compression on these 2 cylinders, compared to the rest? there's an item to check.

 

[j150stlcem]

Re: 89' 150 gt not firing 2 plugs?

I am running test with spark tester. By the way no leaks and good compression(100 psi at all cylinders). Leaning toward Timer base or Stator. Thanks MikDee

 

[MikDee]

Re: 89' 150 gt not firing 2 plugs?

That's the next thing to check is the trigger, or stator, make sure your plug wires are not crossed. good luck, Mike