Stalling after airbox elimination

[kev93]

I just pick up brand new Bonneville. Predator exhaust, bc airbox elimination kit, air injection eleminator, arrow 2 into 2 tune. I have had a few stalls at stop lights, also hesitation just off Idle. I have about 15 miles on it and has died 5 times. Any suggestions??

 

[drlapo]

did you plug the vacuum ports on the intake manifolds?
it sounds like an air leak or lean condition off idle
but you have no carbs to tweek so you may need an O2 check (read off the sensors in the head pipe)

 

[kev93]

It was installed when I purchased it. Where Are the vacuum ports located?

 

[drlapo]

they are brass tubes on the intake manifolds
one operates the air injection on the carbed bikes
I don't know if your bike even has them

 

[bonZa]

the arrow tune you have done will only compensate for exhaust changes, not how it breathes and the changes you have made to the induction are significant, hence why it stalls as it's running too lean

suggest you google triumph twin power as they have a range of tunes to suit your mods

 

[drlapo]

will probably need to go to TUNE ECU

 

[kev93]

The head pipes are Turning nasty gold color.

 

[BlueJ]

Running lean. Obviously - you increased the airflow but not the fuel flow.

 

[JimmyR]

I would avoid riding too much with the bike running so lean. It is not too good for the engine as it is running rather hot. I can't help except to repeat what others have said - it needs tuning! If it was a carb bike I would be able to suggest jets but know very little about EFI. But it needs more fuel!

 

[Flip]

TuneECU link, a USB to 16 pin OBDII cable with FTDI chipset and your trusty laptop.
Do some research, but the fuel injection on these bikes is not all that complicated, and you should be able to flash that ECU quite easily.

 

[kev93]

Gonna install TTP #11 and see what happens. I rode it about 50 miles in that condition, Suppose any harm was done to internals??

 

[Flip]

Gonna install TTP #11 and see what happens. I rode it about 50 miles in that condition, Suppose any harm was done to internals??

Probably not - are you burning any oil? You could also check the compression if it's going to keep you up at night... If you don't have a tester, Harbor Freight sells 'em for ~$20.

 

[normandy]

Gonna install TTP #11 and see what happens. I rode it about 50 miles in that condition, Suppose any harm was done to internals??

It is very unlikely that you did any damage in 50 miles, but as stated, you should correct the condition soon.