MoTeC Global Forum

Hi Every body

I have problem , the engine cut at 6800 , and setup the REV to 7800, befor the car was Ok but after I rebuilt the engine the problem appear, I tried all the mixture from 0.65 to 0.75 and igntion from 20 to 28 and boost from 0.6Bar to 1 Bar also the same
the engine keep cut at 6700 to 6800 RPM
any idea please

the car 2006 SUBARU STI 2.71L

Ps:in the attachment the Loged file

Thank's and best Regards
M.Olabi

Hi every body

Today I incress the boost to 1.2 Bar the engine now cut at 6500-6600 RPM less than 200RPM

Thank's

Can you explain the cut better ?

Is it like a rev limit, missfire etc ?

Is the throttle staying open ?

Dear
how much the spark plug gap....
Regards

mhd wrote:Hi every body

Today I incress the boost to 1.2 Bar the engine now cut at 6500-6600 RPM less than 200RPM

Thank's

Sound like plug gaps or fuel delivery problem

it is was not spark gap, is was mixture problem , we think the engine was not mix the fuel and air well so the mixture go very rich so that the engine miss fire
and until now we don't know whay that happening, and now we trim a lot of fuel at high rpm
like for EX: in fuel table at 5000RPM we run 81 and in 7000RPM we run 51.
any idea please.

The lambda sensor is too close to the turbo outlet and is not reading the correct A/F ratio.