2006 225 VZ 225TLR No spark on #1 and #5

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,037
Starts but still runs bad.
Did a spark test and found no spark on #1 and #5
Swapped coils and still no spark.
Good comp. fuel pressure 55#
Thanks

Found out it's not supposed to fire when in N
Anyone know why?

Started it and tested spark in gear both 1 and 5 have spark.
This has been quite a learning experience.

NOW!!when put in gear low speed still rough then as the rpms pick up it accelerates up and down by its self.
No water in the fuel.
 
Last edited:

dingbat

Supreme Mariner
Joined
Nov 20, 2001
Messages
16,074
Starts but still runs bad.
Did a spark test and found no spark on #1 and #5
Swapped coils and still no spark.
Good comp. fuel pressure 55#
Thanks

Found out it's not supposed to fire when in N
Anyone know why?

Started it and tested spark in gear both 1 and 5 have spark.
This has been quite a learning experience.

NOW!!when put in gear low speed still rough then as the rpms pick up it accelerates up and down by its self.
No water in the fuel.
"We seen I was only firing on 2 cylinders according to YDS, and I knew that isn't right, it should be 4. Then scrolled down to the sensor data and found the neutral switch that drops 2 cylinders while in neutral to be operating correctly when shifted back and forth, but the other one mounted to the same assembly, below the neutral switch (I cant remember exact name, but "shift switch" sounds right), was always on. I remembered that this is the sensor that drops an additional 2 cylinders when making a high torque shift (like when maneuvering at a dock F-R-F-R). I readjusted bracket and everything operated perfectly."
 

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,037
Figured out the 1/5 no fire. In gear they fire.
The problem now is the motor as I rev it up it goes fast then slow then fast and slow again. Does this real quick.
Pull back to N and it idles not great but it idles.
Set the TPS at 5 5.1
Thanks
 
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