Spark Plug issue 200 HPDI

[rodbolt17]

the ONLY correct way to Id any pre2003 HPDI plug is by the tech bulliten AND the color of the ign coil primary connector.
yep it is that simple.

[Jonas The swede]

Hi.
I have problems with a Hpdi 200hk year 2002.
it is firing of 1,4,5,6 att netrual. When higer rpm nr 4,5 is out and it is running on only 2 cylinders, when lowering rpm 4,5 fires again but still 2,3 is out? Any idees? (Sorry for bad english). Change spark plugs?

[boscoe99]

Hi.
I have problems with a Hpdi 200hk year 2002.
it is firing of 1,4,5,6 att netrual. When higer rpm nr 4,5 is out and it is running on only 2 cylinders, when lowering rpm 4,5 fires again but still 2,3 is out? Any idees? (Sorry for bad english). Change spark plugs?

Ideas, yes. Change spark plugs, no.

[99yam40]

the ECU thinks the motor is still in neutral, find out why

oh yea the Ecu will not fire all plugs in neutral

[Jonas The swede]

I changed the ecu and edu last summer. Bought them used. It is a long story. :-(. Have worked many hours and it feels like i have got PTSD from all the problems. Dont know where to start, whay does the ecu thinks it is in netrual? I know that it is not running on all cylinders st netrual, but whay is it cuting out two more cylindrers (sparkplugs) when higher rpm? Do i need to change the e cu again? Is it anything els i can try first? I think I sink it where the sea is the deepest :-(

[boscoe99]

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[99yam40]

should be a switch on the motor linkage that tells the ECU when shifted out of neutral.

it drops more cylinder to protect the motor from over revving when in neutral