McX nytro sputtering on spool up

toony · Jan 25, 2010

I run a 08 Nytro with an McXpress 09' 270 kit. My buddy runs the same with a 2010 nytro and 2010 Mcxpress. His throttle response is perfect....Mine sucks. It seems to clean up and run perfect after it gets to wide open but low end and mid are terrible....any sug?\

Thanks.

Climbmax · Jan 25, 2010

Header is leaking..... or Fuel box has got wet......or injectors are coming on too early?

toony · Jan 25, 2010

box

Header is not leaking. Box might have got wet about a week ago but it has been in a heated shop since then. Is their different maps or programs for the Mc box?

stecka · Jan 26, 2010

Yes 240 and 270 have differents maps

TBird · Jan 27, 2010

stecka said:
Yes 240 and 270 have differents maps

That's because they run with diffrent fuel pressure.

toony; Do you have an AFR?
Would be interessting to hear if it differs between the two.
Does your buddy run 180, 240 or 270?
Have it always run this way or did it suddenly appear?

toony · Feb 23, 2010

fuel

It was the fuel press. regulator. Thanks.

turbo99 · Feb 24, 2010

change your plugs gap them .020

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McX nytro sputtering on spool up

toony

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Climbmax

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toony

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stecka

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TBird

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toony

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turbo99

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