Nytro powderlites DIES WHEN HOT
- Thread starter Ultralord
- Start date
H
Hrt Offroad
Active member
hi, i have the same problem it dies when hot and the fuel pressure is all over the place but it will not go past 25 psi. Let it sit for an hour and it will pressure up and run fine ontill it gets hot again then the same old crap.
I may be way off here but just a thought my nytro has 1400 km on it never ever had a problem with it not having fuel pressure when it gets hot ontill i did the new mapping with the vac line update. just a thoughtPisses me off hauling the sled 6 hours with buddy and having the trip go to crap because of this!
I have to agree with you...I think that it could have a lot to do with the latest updates. No one seemed to have these problems till after the last batch of updates...
Its not happening to everyone. Both jrusher and myself havent had any issues with it dieing when hot or with low fuel pressure. Both of us have the recent updates and were riding this last weekend. We also rode a month ago in temperatures above 0 without an issue.
new setup
Come to think of it, I didn't have any problems, then again, it wasn't runnin very good either, before I did the update.
I've had a couple days where it didn't act up, but I was buzzin around all day, runnin air through it all day.
Then we get into tight trees and steep spots and bluuugghhh, dead. Lots of throttle and no air flowin= a dead Nytro!!!
Come to think of it, I didn't have any problems, then again, it wasn't runnin very good either, before I did the update.
I've had a couple days where it didn't act up, but I was buzzin around all day, runnin air through it all day.
Then we get into tight trees and steep spots and bluuugghhh, dead. Lots of throttle and no air flowin= a dead Nytro!!!
H
Hrt Offroad
Active member
Mine doesn't die when hot...it just won't start again after I shut it down - unless I leave it sit for 20 mins. or put snow on the fuel pump. I rode many warm days with the throttle WFO in neck deep snow before the recent updates, and it ran relatively flawless without hot start issues. The only common denominator amongst those of us that have had issues is the latest updates. I had issues this past weekend and the temps were between -6 and -10 Celsius...so it doesn't appear to be air temps...
I'm not pissed...I'm just trying to figure out what is up
I have modded many sleds and knew what I could be in for - Tuning and Tweaking
J
jehay
Member
mmmm. this is interesting problems after update.......... wounder want we should do. One more thing dave says that the new updates makes more power i have to disagree before my updates i had about 2 full turns out on my shockwave helix. Now with the new updates it will not pull it's rpm i had to turn it in all the way in to get the rpm. I was low about 500 rpm! So basily i had to put in a less of a degree of helix so the engine can pull it
before jan 17 update?
Which map were you guys runnin before the Jan 17 update, the Dec 14, or the (Dec 19, I guess for low alt.)
I've heard of guys runnin the low alt. Dec 19 map up here in MT at 6 to 9000 and they run relatively good, of course with that damn bobble.
Which map were you guys runnin before the Jan 17 update, the Dec 14, or the (Dec 19, I guess for low alt.)
I've heard of guys runnin the low alt. Dec 19 map up here in MT at 6 to 9000 and they run relatively good, of course with that damn bobble.
ok
I talked to Dave at Powderlites today about the problem. He said it was a venting issue, no way for hot air to get out of there.
Lococoin, jrusher, are you guys runnin a bunch of vents on yours???
Also, those of you who are having the trouble, Do you have any vents at all???
I am having the dying problem and I DO NOT HAVE ANY VENTS,,,,yet!!!
So, is venting is the key??
Also, Is there any good tunnell cooler kits out there that are a clean addition to the Nytro???
I talked to Dave at Powderlites today about the problem. He said it was a venting issue, no way for hot air to get out of there.
Lococoin, jrusher, are you guys runnin a bunch of vents on yours???
Also, those of you who are having the trouble, Do you have any vents at all???
I am having the dying problem and I DO NOT HAVE ANY VENTS,,,,yet!!!
So, is venting is the key??
Also, Is there any good tunnell cooler kits out there that are a clean addition to the Nytro???
No vents added,, Ive blocked off all the OEM openings with prefilter material.. I know Lococoin doesnt have any extra venting either and hes running stock rad and cooling system tunnel etc..
Seems really odd when Ive ran my sled in +5 to +10 temps,, same with Lococoin, I remember going out first ride of the year wasnt much snow in Valemount,, everyones sled was overheating a couple minutes up the trail mine the only turbo yammi never saw the light come on the whole trip etc..
I dont stop much when out in the hills either..
I plumbed everything according to Daves instructions the only thing I did different was mount the fuel reg over and above battery on the frame..
U
Ultralord
Well-known member
I updated the map and turned down the fuel pressure to spec the sleds 1900 rpm bog went away but I did not like to idle and would lean pop at 12 lb of boost I jacked the fuel pressure back up to 55 sled still runs great now it Idles. as far as the rb3 overheating I drilled 4 holes 1 in my finger and 3 in the sleds black panel by your right knee seamed to do the trick
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hmmm?
Ultralord, so you are runnin the Jan17 map at 55psi on the fuel reg, at what elevation????
Ultralord, so you are runnin the Jan17 map at 55psi on the fuel reg, at what elevation????
H
Hrt Offroad
Active member
I talked to Darren today...he feels with warm temps and engine heat that the fuel is heating and over pressurizing in the fuel rail therefore causing a vapor lock.
On the Apex - there is a return line from the end of the fuel rail that returns the excess hot fuel into the tank, but on the Nytro there isn't one! They are working on a solid fix, but circulating and venting the hot air from between the back of the rad and tank will help to rectify this issue.
It takes a lot of heat in the cooling system to activate the rad fans as well...they very seldom come on! Darren suggested putting a pusher fan on the front of the intercooler would help as well.
I think that I am going to plumb a u-cooler in the rear tail section and delete the rad altogether...this will offer serious air movement back there as well. A headlight delete vent would also help too; for those who don't require the stock headlight.
This is not a problem that is happening to only Powder Lites systems...quite a few MCX guys are having it as well. Thankfully we have PL right here in North America to help us out!
I am going to try some different cheap fixes out this weekend...I'll keep you posted!!
On the Apex - there is a return line from the end of the fuel rail that returns the excess hot fuel into the tank, but on the Nytro there isn't one! They are working on a solid fix, but circulating and venting the hot air from between the back of the rad and tank will help to rectify this issue.
It takes a lot of heat in the cooling system to activate the rad fans as well...they very seldom come on! Darren suggested putting a pusher fan on the front of the intercooler would help as well.
I think that I am going to plumb a u-cooler in the rear tail section and delete the rad altogether...this will offer serious air movement back there as well. A headlight delete vent would also help too; for those who don't require the stock headlight.
This is not a problem that is happening to only Powder Lites systems...quite a few MCX guys are having it as well. Thankfully we have PL right here in North America to help us out!
I am going to try some different cheap fixes out this weekend...I'll keep you posted!!
U
Ultralord
Well-known member
MAP DATE IS JAN 17 elevation is 2500-6000
yeah
Let me know how your U cooler goes, I am thinking the same thing, get rid of the radiator, and put the stock fan on the intercooler.
Right now I have my fan wired to run all the time and that didn't really help very much. Just no place for all that hot air to go back there..
Keep us posted, I talked to Dave and he just said to vent the area, hopefully there is a more solid fix coming soon.
Here in MT I'm runnin anywhere from 4000 to 8000 ft. in elevation.
Anyone else runnin up over 50psi on the fuel reg, at idle of course..
Let me know how your U cooler goes, I am thinking the same thing, get rid of the radiator, and put the stock fan on the intercooler.
Right now I have my fan wired to run all the time and that didn't really help very much. Just no place for all that hot air to go back there..
Keep us posted, I talked to Dave and he just said to vent the area, hopefully there is a more solid fix coming soon.
Here in MT I'm runnin anywhere from 4000 to 8000 ft. in elevation.
Anyone else runnin up over 50psi on the fuel reg, at idle of course..
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U
Ultralord
Well-known member
With no proof other than the rb3 box was hot I am sure the rb3 was my problem. I had my hand on that fuel pump several times I did not notice that it was warm. The rb3 was so hot that It was melting the glue on the velcro. I would think that if the sleds are vapor locking that wen they did start the would be semi flooded.
OK here is my story.
Last season my MCX Nytro ran flawlessly.
The beginning of this season (after some more mods) it starting acting up (like described in this thread). I had a 1 piece BR Tech hood with NO Venting at te beginning of the season. The sled ran like crap all the time. I vented the headlight area and it fixed the problem 80%. Then i rolled my sled and cracked the BR Tech hood so now I am back to the stock set up. I have drilled some holes in the upper plastics (the plastic that the computer mounts to), a few holes around the hood and in front just above the clutch. The results are it's 90% fixed. It happens maybe twice a day but if i cruise and get air flowing it will correct itself. I just got in the Mtn Fit Headlight Screen and hopefully that will help also. My RAD fan never goes on and will run the diagnostics to make sure it is working but i'd like to put it on a toggle switch.
I like the idea of re-routing the fuel lines and would like to here if people have done this yet.
Last season my MCX Nytro ran flawlessly.
The beginning of this season (after some more mods) it starting acting up (like described in this thread). I had a 1 piece BR Tech hood with NO Venting at te beginning of the season. The sled ran like crap all the time. I vented the headlight area and it fixed the problem 80%. Then i rolled my sled and cracked the BR Tech hood so now I am back to the stock set up. I have drilled some holes in the upper plastics (the plastic that the computer mounts to), a few holes around the hood and in front just above the clutch. The results are it's 90% fixed. It happens maybe twice a day but if i cruise and get air flowing it will correct itself. I just got in the Mtn Fit Headlight Screen and hopefully that will help also. My RAD fan never goes on and will run the diagnostics to make sure it is working but i'd like to put it on a toggle switch.
I like the idea of re-routing the fuel lines and would like to here if people have done this yet.
S
seano700
Active member
Venting
The more you guy's describe this problem the less I think I have it. After a good weekend of riding I think my only problem is lack of fuel not heat. I live fairly low 1800 ft and find 10psi is the maximum boost I can run before running out of fuel. I too cheated and set my fuel pressure up around 50psi to stay safe. That being said Darren is sending me some larger injectors today, and a 3 bar MAP sensor. I don't really want to turn things up, but it would be nice to run 12psi here at home, just like the other kits do.
I attached some pictures of the 2coolvents, back when our dollar was equal to the us these were fairly cheap $250.00 set and obviously worth it. Anyone else running the larger injectors?? I know Dave is working on building a Map this week.
One thing I must say Powder Lites has very good customer service, and they always try to help!!
The more you guy's describe this problem the less I think I have it. After a good weekend of riding I think my only problem is lack of fuel not heat. I live fairly low 1800 ft and find 10psi is the maximum boost I can run before running out of fuel. I too cheated and set my fuel pressure up around 50psi to stay safe. That being said Darren is sending me some larger injectors today, and a 3 bar MAP sensor. I don't really want to turn things up, but it would be nice to run 12psi here at home, just like the other kits do.
I attached some pictures of the 2coolvents, back when our dollar was equal to the us these were fairly cheap $250.00 set and obviously worth it. Anyone else running the larger injectors?? I know Dave is working on building a Map this week.
One thing I must say Powder Lites has very good customer service, and they always try to help!!
Venting
I sure hope when they tell me just to vent it they're right!!!!! Or it's right back to complaining, I'm gettin sick of it...
I sure hope when they tell me just to vent it they're right!!!!! Or it's right back to complaining, I'm gettin sick of it...
H
Hrt Offroad
Active member
These sleds run hot...regardless if it is the complete fix - they need to be vented.
Is anyone running a rad delete and rear u-cooler having these issues?
Mountain Fit Headlight Vent. Hope it helps
