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please help turbo pro problems

I am at a total loss for what else to look into so any help would be appreciated

I have tried searching and alot of the treads that discuss issues similar to mine taper out and do not contain the actual fix....

Here’s the story –

2012 pro rmk with a 2013 BD Intercooled turbo

Ran great for 500 miles last year and on my first ride this year I started having issues- I stored it with a few gallons of 100ll - sled was started weekly idled up to temp stored inside- fuel was syphoned before my first ride and I put in 5 gall of straight 100ll in

Sled ran great for a half hour then would stutter and not want to rev up and get into the boost from idle, this progressed to the sled not reving up while in and out of the throttle & If I held it to the bar it would stutter and eventually rev and boost up. It was like hitting a wall around 5900-6500 rpm and going way lean on my AFR 17-19.9 in all throttle positions around that rpm (I verified my fuel settings were the same as last year)

The sled runs great up to 6000 ish rpm, idles smooth and feels great no hesitation or anything on the very bottom

No check engine lights, no det


Took it to the dealer to have tps, injectors, and fuel pressure checked- tps was out of spec and adjusted- took it out for a ride and no change

Put new spark plugs in

I then replaced my bellows, and cleaned the guillotines and all ports both were good but found the line into the solenoid was rubbed through from the steering arm fixed hose- went back out no change.

checked ground wires

Checked primary clutch everything is good.

Tried plugging the vent line off the exhaust valves – no change

swapped stock pipe egt with working pros - no change

Swapped fuel tanks with working pro – no change

Replaced fuel filter - no change

Verified aux injectors are working

Tried increasing fuel in the 5700-7900 rpm ranges with no change


Checked waste gate on turbo, all hoses and lines associated with the turbo and found no issues. Spark plugs and pistons show lean condition as well



Since the problem worsened the highest rpm I have hit is 7300 (according to BD box) & 5.6#’s (I am set on 10#’s)


Any ideas or other things to check would be greatly appreciated


I am planning on taking the turbo off this weekend and exaiming everything up close & seeing if the problem is still there in stock form.


Also i did a headlight delete when the turbo was put on and did not add any lights or resistor... could something electrical be fried? how would i test..?





Thanks
 
Last edited:
Did you check to see if the little holes behind the exhaust valves are plugged?

yes - added to the first post as things i have checked ... both ports on the valve and the port to the cyclinder

Factory EGT sensor in the pipe...


yes - added to the first post - we swapped the egt sensor with a working one from another pro.


thanks guys its already been a long process and i knew i was forgeting a few things id checked .
 
Have you or the dealer done an actual TPS Sweep? Or verify how much/why the TPS was off? Are you watching fuel pressure under power to make sure it is rising? If you are seeing that it really is lean I would make sure those things are done. Also what about the ground wires, are they all intact and clean?

,Dan
 
Have you or the dealer done an actual TPS Sweep? Or verify how much/why the TPS was off? Are you watching fuel pressure under power to make sure it is rising? If you are seeing that it really is lean I would make sure those things are done. Also what about the ground wires, are they all intact and clean?

,Dan


I cannot remember the value my TPS was off, not by much the dealer said.. what is a TPS Sweep??

correct me if i am wrong but the only place to check fuel pressure is at the tank.. and when i swapped tanks (fuel pumps) there was no change. i also installed the new fuel filter with the other sleds tank installed as well as mine and saw no change.


Checked ground wires- added to original post- no corrosion or buildup, all wires tight.



THANKS FOR THE INPUT !!
 
Have you changed the throttle switch in the thumb throttle?

the Throttle safety switch?

No I have not tried that, I didnt think the TSS could/would cause such a persistant problem.

how would I replace this, i looked at the parts diagrams and do not see a throttle safety switch anywhere.


thanks
 
Its there, down on the bodies, some just zip tie the switch closed..

By the throttle bodies? I thought the TSS was on the throttle block.

Does the ebc stay on constant or does it flash back and forth from your actual boost to SET.

It's a 13' kit with the integrated EBC. It shows my set boost pressure on the main screening the bd box. It doesn't read the actual in real time... Well at least mine doesn't.
 
I cannot remember the value my TPS was off, not by much the dealer said.. what is a TPS Sweep??

correct me if i am wrong but the only place to check fuel pressure is at the tank.. and when i swapped tanks (fuel pumps) there was no change. i also installed the new fuel filter with the other sleds tank installed as well as mine and saw no change.


Checked ground wires- added to original post- no corrosion or buildup, all wires tight.



THANKS FOR THE INPUT !!

A sweep is where they slowly run the throttle through its operating range and check for dead or high spots in your case it would be a dead spot if its lean.

Maybe your system is a bit different from the one on my iq but I have an aftermarket rising rate fuel pressure regulator. If its stuck open it will create low pressure and the problems your experiencing. If your using the stock regulator then yeah its in the tank.

Also fuel will be the same pressure anywhere from the pump to the regulator which in my case I have a gauge on the regulator.

, Dan
 
It's a 13' kit with the integrated EBC. It shows my set boost pressure on the main screening the bd box. It doesn't read the actual in real time... Well at least mine doesn't.

Ah. Didn't catch the 13 part. My 12 kit has the external EBC and I was experiencing the same problems as you. My EBC wasn't getting enough power and telling the extra injectors to open up. How did you test your secondary injectors to verify they where working. Just curious for future knowledge btw
 
I might have missed it, but what about reeds. It doesn't make much sense that it got put away fine and that would be the problem. It's another thing to check.
 
Have you checked your fuel pressure reg sounds like you are running out of fuel. It might be stuck open.

Sent from my DROID RAZR using Tapatalk now Free
 
A sweep is where they slowly run the throttle through its operating range and check for dead or high spots in your case it would be a dead spot if its lean.

Maybe your system is a bit different from the one on my iq but I have an aftermarket rising rate fuel pressure regulator. If its stuck open it will create low pressure and the problems your experiencing. If your using the stock regulator then yeah its in the tank.

Also fuel will be the same pressure anywhere from the pump to the regulator which in my case I have a gauge on the regulator.

, Dan


ok I will check this out thanks for the info.

The BD kit I have runs on the stock fuel pump and reg, both are in the tank hence my tank swap I was really hoping switching tanks would be my solve my problem.

everyone who rides it says it seems like it is starving for fuel above 4900.


Sorry, ya, not sure where my mind is...

Usually take out, zip tie and put under hood..

awesome I will give this a try tomorrow, seems pretty straight forward

Ah. Didn't catch the 13 part. My 12 kit has the external EBC and I was experiencing the same problems as you. My EBC wasn't getting enough power and telling the extra injectors to open up. How did you test your secondary injectors to verify they where working. Just curious for future knowledge btw

I went to the xtra menu and selected tst for the button, started my sled and made my own 'button' as my kit does not have the optional one (the button plugs into the same as the 9v battery power plug.) when I completed the circuit with the sled running It immediately flooded and killed the motor, I verified this by pulling plugs.

I might have missed it, but what about reeds. It doesn't make much sense that it got put away fine and that would be the problem. It's another thing to check.

haven't checked the reeds, I suppose I should. reeds were replaced less than 100 miles ago. and I would think if they were toast the bottom end would be affected .

my bottom end is perfect, runs great just hits a wall.


---

Would a boost leak create this? all of my hoses/connections feel tight and look good.

thanks again everyone !!
 
Ah. Didn't catch the 13 part. My 12 kit has the external EBC and I was experiencing the same problems as you. My EBC wasn't getting enough power and telling the extra injectors to open up. How did you test your secondary injectors to verify they where working. Just curious for future knowledge btw

I had had the same problem last winter, you have ship your controller to boondocker for reprogramming:) they did it for free
 
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