2015 Viper start up and idle

[Wannaviper]

Seems odd that a re-flash would cure this. Seems strange that it will run OK, on a given flash, then gradually decline to mimic tight valve symptoms.
Do the flashes, or programmings, wear out? Do they slowly degrade to the point of drivability issues?
There's something more here. Just don't know what.

I can't say that I understand it, but my 2014 had me convinced that it had tight valves at the end of last season. I don't have the invoice in front of me, but I don't remember that they changed the plugs or did any mechanical work other than changing the oil. Honestly, I was amazed at how well the sled ran after it was reflashed.

 

[SGVIPER]

I called the dealer to check and it doesn't have the current ecu flash. I will have to find time and get it over while we still have no snow.

 

[Barry]

I have a 2014 with @ 9,800 miles on it and at the end of last season, it seemed to have the symptoms attributed to the tight valves, including all the symptoms you described. I took it into the dealer and he said the valves were fine. He did the latest reflash, and all those symptoms disappeared! It does turn over a little longer before firing, but it is starting and running great, and it has better acceleration. If you are having those issues and the sled does not have the latest reflash, reflashing will probably solve your problems. If you have your VIN #, the dealer should be able to tell you over the phone whether the sled has been reflashed. If it hasn't been reflashed, set up an appointment to do it while you wait, it only takes a few minutes.

I think I will do that. My sled had 8000 miles and I checked valves and two exhaust valves where at 0. So they did need it. Lots of work. Still little hard starting but when it starts it keeps running. So maybe Flash will help

 

[Phazer2Viper]

Brought it into the local dealer and 5 of 6 valves were tight and 2 had 0 clearance. Plugs were a mess too. Luckily it was covered under my recently expired warranty. It was going to be 6.5 hrs of shop time plus parts.

 

[Barry]

Brought it into the local dealer and 5 of 6 valves were tight and 2 had 0 clearance. Plugs were a mess too. Luckily it was covered under my recently expired warranty. It was going to be 6.5 hrs of shop time plus parts.

I’d pay to see someone do that job in 6.5 hrs. I think it’s over that just to get to valve shims. WOW

 

[Phazer2Viper]

I’d pay to see someone do that job in 6.5 hrs. I think it’s over that just to get to valve shims. WOW

Yamaha only pays 4.5hrs for the job. He was thinking it would take more like 8 but was going to cut me a deal. So hopefully it stays within the specs for a long time

 

[pdiddy]

What kind of oil are you running badams262?

 

[Phazer2Viper]

What kind of oil are you running badams262?

The full synthetic yamaha oil

 

[SumpBuster]

May not be applicable, but like our older hp laptop...stuff happens. A system restore brings it all back fast and good. We have a dodge that stalls with a little throttle sometimes. Not often, but once I disconnected the battery forcing a reboot, and it runs and starts like new. Have done this on an 05 neon too. Probably never know why, but it happens.

 

[Norse]

Does the ecu "learn" and make adjustments over time?

 

[sxr70001]

Without a working o2 sensor there's no way that it can. I don't think these ECU's are that sophisticated anyway. Certainly nothing like what we are used to in our cars.

 

[SGVIPER]

I took it in to get the updated ecu flash. I started it to unload and it took forever to fire up. Got it in the garage and reved it up to find out it has a hanging idle now. This is sad how they can't seem to perfect these things after this many years of issues

 

[SGVIPER]

Also forgot to add that the stall issue went away so I guess that's one positive lol. Hopefully the cold starts aren't always that bad.

 

[snowfever27]

I just did the new flash on my XF7000. It cranks longer but starts the first attempt. Before it would take 2-3 attempts to start. It isles smoother now but I did notice it does have a very brief (2-3 seconds) having idle that quickly settles to a much smoother ideal. The altimeter is more accurate now too. I’m glad I flashed it, I’d rather have it start the first try, even if it cranks longer. My sled has 1,900 miles, brand new CR9EK plugs and brand new battery.

 

[SGVIPER]

I just did the new flash on my XF7000. It cranks longer but starts the first attempt. Before it would take 2-3 attempts to start. It isles smoother now but I did notice it does have a very brief (2-3 seconds) having idle that quickly settles to a much smoother ideal. The altimeter is more accurate now too. I’m glad I flashed it, I’d rather have it start the first try, even if it cranks longer. My sled has 1,900 miles, brand new CR9EK plugs and brand new battery.

Good to hear. I have been starting mine all night and have to say the warm starts are alot better. Hopefully that first cold start was a fluke and glad to hear that the hanging idle may be normal