HELP!!! Computer seems to be shutting engine down, hot?
As you can tell from my signature I am using a transplanted RC51 SP2 in a unique application. It has been dyno tuned and in general seems to be in great shape.
It was previously running fine for two trips but ran into a problem this weekend. After driving it for somewhere between 5 to 20 minutes it all the suddens just shuts off, especially if going slow during this period. Runs great and maybe even better than it ever has during this time. No popping, no smoke, nothing ... again it really runs great then just shuts down. My temp was getting up to about 215 so thought maybe I just need to run my fan so I hard wired it to a switch. This kept temps to about 175 but still shutting down. Once it shuts down it will start and idle just fine most the time. If I rev it or let out the clutch it shuts down immediately. Sometimes even me just shifting from neutral into first with clutch in it immediately dies. If I let it sit for 10+ minutes it will run just fine until it shuts down. To make it back home I and during troubleshooting had to go through this shutting down, sitting 10 or so minutes, and continuing on about 8 times so it is very repeatable and thus dont think anything electrical etc. is "loose". It really feels like the computer just shuts everything off as no hesitation etc. it just shuts off. No warning lights etc. showing on the digital gauge.
I am running a much bigger radiator than a stock RC51. Checked level and ok. All fluids ok. My power commander powers on and initializes just fine. Any ideas?
I really think this has something to do with something getting too hot and telling it to shut everything down. Could the Power Commander even be doing this?
Could I just be running lean? The custom dyno tune was a safe tune and most of it was increasing fuel. It was done on a very hot 110 degree day (now we are much cooler) and I did switch to the K&N filters afterwards so perhaps this has made it lean?
One other thing I have noticed, but maybe a seperate issue, is when I turn the ignition off it often runs for a few seconds. I only mention this because on one occassion this weekend I turned the ignition off it did not shutdown at all ... left it turned off for maybe 30 seconds and still running so just turned the switch to on and continued. It then shortly shutdown on its own later as discussed above.
Thanks for any help ...
Couple basic questions (some unrelated to this subject):
- What temp is normal and what temp does it shutdown?
- If you start engine with clutch in does it jump forward just a little?
- Anyone running HID lights or alot of accessories and stator have hard time keeping battery charged? I wonder if I need to relocated my voltage regulator to a place where it gets more air rather than behind my seat.
Polaris RZR with an '04 SP2 transplanted in it. Chain driven through a gear box with axles and CVs. The only thing left stock on the RZR is the frame and plastics
. But, the frame is beef'd up too
Last edited by twvette; 10-31-2010 at 07:52 PM.