Does not start normal and runs erratic

[Apex2006]

Have a boosted 2009 Nytro RTX SE and experienced a loss of boost this weekend when the throttle body boots came off. Loss of power and hard to start. After re-inserting the boots and tightening, sled ran awesome the entire next day. The following morning rode to breakfast with our group and then went out on the lake for a few WO runs. I experienced the same symptom once again, only this time I did not find anything wrong with boots coming off or any leaks throughout the entire intake tube from the Turbo to the engine block. Will only start with giving a little gas and runs like crap. All 3 plugs look the same with a slight dark look to them. I replaced the plugs and no change. Re-checked anywhere I could think of for any boost leaks and could not find any. When I re-checked the throttle body rubber boots that mount against the engine, especially the two outside ones, are not flush against the block all the way around the inlet. I bet I tried 4 times to mount those flush and was unsuccessful. So I don't know if I still have a boost leak, or something else is causing the problem. Any help with next steps would be appreciated.

 

[nolimits]

double check for leaks remove air filter from turbo and make a test boot with a pressure regulator and pressurize . if there are no leaks check the map sensor

 

[Apex2006]

So basically apply pressure through the filter connected to the Turbo and it should hold the pressure? Map sensor meaning my programmer module?

Thanks for the tip, I will check when I get home from work.

 

[Apex2006]

Could not find any leaks. All looks normal, seems to be starving for gas as that is the only way I can keep it running, even though it runs terrible. I have a feeling it is related to my programmer located on my hadlebar but not sure if there is a way to test or reset? I contacted Push Turbo to see if they have an idea. Waiting to hear back

 

[Apex2006]

Anybody? Thoughts?

Thanks...

 

[fxnytroxtx]

My sled was running alittle wierd, so I took off my trail tank to check spark plugs (which looked good) and found out that my flex joints are shot which explains is. Maybe urs r shot. And the thing is I didn't even here it get loader or any rattle. Or you might have excidenly pressed something on ur controller?

 

[Vmax4]

Easy to try:

Replace Fuel Filter (Inline maybe with that kit? or in tank???)

 

[Apex2006]

Thanks, I will try those two as I am frustrated as to what is causing it...

 

[Apex2006]

Flex pipes are fine, no gas filter to check. I bypassed the programmer module and it ran the same. I am going to swap the battery with my son's Nytro to swee if that makes a difference in case the voltage is low and messing with the ECU.

 

[Apex2006]

Changed battery, then ECU with my son's sled. Same result. Starting to think it is the Push Turbo Program module. I have e-mailed and called Ken at Push Turbo over the past two days and still have not received a response

 

[maxxp]

You can try swapping your IAT sensor with your son's... the sensor you removed from your air box during the install. Mine was difficult to start for a bit, but adjusted my BOV and that helped. How are your AF readings?
Good luck with the response from Ken - took two weeks for me last time I emailed him.

Keep us posted on what you find out...

 

[Apex2006]

Swapped the MAP sensor, no change, ohmed out every sensor related and all is right on. I removed the entire intake pipe system and found no cracks, leaks on any pipes or boots. Turbo is spinning when I have it running, just seems like either a boost leak, or fuel not being delivered properly via the Turbo programmer.

 

[Apex2006]

Ok, I have exhausted all I can and thanks everyone for the tips but have not made any progress. Here is what it sounds like. Any last ideas before I button it back up and consider dropping off at the dealer. I have never had my sled in a dealer for service ever!

 

[Srxspec]

Any idea what the water temp was when doing those blasts down the lake? Air/fuel ratio? Any oil coming out of the breather hose off the oil tank? I'd be doing a leak down test or at least a compression test to see if you possibly hurt the motor.

 

[Apex2006]

The motor wasn't that hot as we returned from breakfast about a mile away before hitting the lake. No oil loss out the breather tube/tank. I talked to a lead tech at the snowmobile dealer and he thinks it may be my TPS sensor. Wouldn't that throw a code? I have no codes at all. Hope it is not the motor, but I guess it could have over-boosted.....