Sidewinder momentarily cuts out

[Eugenius.w]

I’m having issues when I hit the throttle at the start, it lifts up the skis hard to about 50 mph cuts out for a second then full power for about a second and a half then cuts out again for a second. If I gradually pick up speed and then hit at 60mph it will pull hard all the way to 110mph without cutting out. Any ideas where to look. I’ve eliminated the roll over valve. Put a second clamp on the cold air intake by the turbo. Checked for moisture in the vacuum lines at the sensors. Cleaned out about a table spoon of watery sludge from the air cooler. Where do I look next. Could it be a faulty sensor?

 

[NYTurbo]

Sounds like a fuel delivery issue

 

[Eugenius.w]

Sounds like a fuel delivery issue

I don’t understand how it could be a fuel delivery issue when it still pulls hard after it cuts out. Or if you roll it up to 60 mph then squeeze it and it pulls hard to 110 mph.

 

[74Nitro]

I don’t understand how it could be a fuel delivery issue when it still pulls hard after it cuts out. Or if you roll it up to 60 mph then squeeze it and it pulls hard to 110 mph.

Try with full tank to know.

 

[74Nitro]

I don’t understand how it could be a fuel delivery issue when it still pulls hard after it cuts out. Or if you roll it up to 60 mph then squeeze it and it pulls hard to 110 mph.

Your rate of acceleration is higher at slower speeds.

 

[Eugenius.w]

Try with full tank to know.

I did have a full tank of premium fuel

 

[74Nitro]

I did have a full tank of premium fuel

Ok, I'm not sure what it could be then.

 

[74Nitro]

Is it tuned?

 

[Eugenius.w]

Your rate of acceleration is higher at slower speeds.

Yes I agree

 

[Eugenius.w]

Is it tuned?

I have a MBRP performance exhaust. That it.

 

[74Nitro]

I have a MBRP performance exhaust. That it.

I'm not sure which version you have on it, but it could be causing knock protection to activate possibly...?

 

[Eugenius.w]

I'm not sure which version you have on it, but it could be causing knock protection to activate possibly...?

I could install the old exhaust and see if that eliminates the problem.

 

[0degC]

I could install the old exhaust and see if that eliminates the problem.

High flow muffler on stock tune could be over boosting. Ecu don’t like it and cuts out. Try stock muffler if goes away that is very likely what it is.

 

[74Nitro]

One other thing that could be happening is that you are tapping the rev limiter.

 

[Eugenius.w]

High flow muffler on stock tune could be over boosting. Ecu don’t like it and cuts out. Try stock muffler if goes away that is very likely what it is.

Thanks I will try the old muffler tomorrow