383 stroker, FMS 42lb injectors, Monoblade. Pulled the plugs and looked alright but the 6 and 8 (passanger side back plugs) were completely black. Any ideas why would only 2 of them were black. Car has split BLMs due to Monoblade and no IAC passage...i am guessing thats part of the problem?
Let me know what you guys think.
Thanks

 

yes the monoblade is prone to give problems like this because there is no IAC passage and basically the "cylinders" are fighting fot the excess air. It could also be that those injectors are leaking...

 

injectors are brand new so i doubt they are leaking...anyone come up with a fix for the monoblade and iac?

 

try to do a search for the "split blm" fix...That will help ya out..

 

This it?

http://www.noid.org/~lj/PCM%20Tutorial/SplitBLMinfo.htm

 

thats it...

 

Anyone know if the Split BLM article solved Saint69's problem??? I have a new stroker with the same problem.... really black plugs on Cylinders 6 and 8.

I have the same intake, throttle body and IAC that I had before the stoker upgrade, so Im wondering if I might have some other problem besides the one suggested by the Split BLM write up since previously my BLMS were very close to each other.

 

my problem was that 6 and 8 valve spring broke hehe

 

^nice

 

Woah, the valvespring broke? Wouldn't that mean that the valve would get dropped?

I guess it's better to run rich on those cylinders than to wreck a piston and a valve guide...

 

I had tripple springs, so the valve did not drop thank god.
The plugs were black because the valve was not opening/closing as it should

 

and if u follow this little site it fied the problem? im thinking of getting a monoblade soon is this the only problem they get? and do all have this problem?