700 dragon seizes again

[beamslayer]

Last year first ride of the year I seized it fiquired I cold seized it my fault.Replaced pto cylinder and piston changed rings on mag side rode 300 trouble free miles. This year checked it all over went 2 miles from the truck 127 degrees 8150 rpms it seized again. Any ideals why? Sled has 2000 miles on engine I think. Could the tps sensor have anything to do with this?It is the only thing I have not got to that yet need to buy a plug can not seem to get in the with my tps tool I built. Plugs are a nice brown color.It seem to bog a couple of times just before it seized I has all ways done it .Have not tore it down yet .

 

[paulharris]

Last year first ride of the year I seized it fiquired I cold seized it my fault.Replaced pto cylinder and piston changed rings on mag side rode 300 trouble free miles. This year checked it all over went 2 miles from the truck 127 degrees 8150 rpms it seized again. Any ideals why? Sled has 2000 miles on engine I think. Could the tps sensor have anything to do with this?It is the only thing I have not got to that yet need to buy a plug can not seem to get in the with my tps tool I built. Plugs are a nice brown color.It seem to bog a couple of times just before it seized I has all ways done it .Have not tore it down yet .

did you suck all the old gas out that has been sitting in the tank all summer and put fresh gas in it?

 

[xc6rider]

Post a pic of the pistons? Sure it's a cold seizure?

Fuel, or fuel filter issue maybe?

 

[skibreeze]

Old fuel clogging the fuel filter/ injectors. TPS.

 

[Ski-Dont89]

did you run premium in it or just regular fuel?

 

[beamslayer]

I only run 91 oct nonethonal I start it every month and let it run for awhile. I tore it down tonight and found the cylinder that I replaced last year is cracked on the exhaust port and the piston and cylinder a scuffed on the intake side and the exhaust side where the crack is toward the pto side.Any ideas on what to look for or what is the chance of a bad replacment cylinder from mellinium. Snowing like a muther out and broken down nothing to do but sit around and talk to MR. Jim Beam.

 

[Kraven]

Last year first ride of the year I seized it fiquired I cold seized it my fault.Replaced pto cylinder and piston changed rings on mag side rode 300 trouble free miles. This year checked it all over went 2 miles from the truck 127 degrees 8150 rpms it seized again. Any ideals why? Sled has 2000 miles on engine I think. Could the tps sensor have anything to do with this?It is the only thing I have not got to that yet need to buy a plug can not seem to get in the with my tps tool I built. Plugs are a nice brown color.It seem to bog a couple of times just before it seized I has all ways done it .Have not tore it down yet .

Sorry to hear your ride's down and it's stormin' out, that sux!

As a general rule bogging = running lean, I.M.O. Could be fuel filter, or maybe it needs a PC-3 /5

Even though your plugs are brown, the 2007 D7's (I have one) were so lean in the 5000-6000 R.P.M. range it would feel like you hit the kill switch.

PC-3 now 10% RICH in the mid-range and all is well.

After you get another jug for it, I'd change the fuel filter, fresh fuel and you may want to consider a PC-5

 

[beamslayer]

I will change the fuel filter has anyone perfected the napa change over? What would make the cylinder crack. The old gas gets drained every year and fresh fuel is but in.What exactly does the tps do.As far as a fuel controller I have been looking into one but this sled has run 2000 flaw less miles until the cold seize last year than rebuilt and another 300 miles only to seize again.It is hard to beleve a fuel filter would seize a engine and only on one side.I will try and post pictures on here what is the best way to install pictures? Thanks everyone for your advice

 

[beamslayer]

Here's some photos of my piston. etc.

 

[Kraven]

I will change the fuel filter has anyone perfected the napa change over? What would make the cylinder crack. The old gas gets drained every year and fresh fuel is but in.What exactly does the tps do.As far as a fuel controller I have been looking into one but this sled has run 2000 flaw less miles until the cold seize last year than rebuilt and another 300 miles only to seize again.It is hard to beleve a fuel filter would seize a engine and only on one side.I will try and post pictures on here what is the best way to install pictures? Thanks everyone for your advice

The T.P.S. (Throttle position sensor) on a CFI can cause a LEAN or RICH condition, so it CAN cause a problem. It may have gotten "knocked" out of adjustment on the last re-build??

It's pretty E-Z to check and re-set, the step by step is under INCREASING YOUR IQ pinned at the top.

Set it at .70 with the throttle blades FULLY closed and then open until .95 volts is achieved (800's are .94, the 2007 D7's are definitely .95 volts)

I wouldn't dwell too much on "it worked for the last 200 miles"

I.M.O., I would:

1) Get the new cylinder,

2) Verify T.P.S. setting

3) New fuel filter

4) PC 3 or 5, richened up in the 5000 R.P.M.-6000 R.P.M. range

5) and go riding A.S.A.P.

 

[rmkboxer]

so are you getting oil? I would be looking at that first.

 

[beamslayer]

If it was a oil problem would not both cylinders be shot same with fuel issue should show up on both cylinders?Have you ever seen a cylinder cracked in those areas?I was well out of the 5 to 6000 range when this happened I was running at different rpms all the way up the trail checking on temps and rpms to see where my clutching is at. My belt is a inch from the top on the drive clutch so I have more clutching to do.. What makes the pc 3 or the pcv better than the attitude or the BD box?

 

[Kraven]

If it was a oil problem would not both cylinders be shot same with fuel issue should show up on both cylinders?Have you ever seen a cylinder cracked in those areas?I was well out of the 5 to 6000 range when this happened I was running at different rpms all the way up the trail checking on temps and rpms to see where my clutching is at. My belt is a inch from the top on the drive clutch so I have more clutching to do.. What makes the pc 3 or the pcv better than the attitude or the BD box?

More precise/accurate adjustments,

On the PC-3 or PC-5 you can adjust fuel every 250 R.P.M. and every 10-20% of throttle opening.

On the Boondocker there's a low, mid and high range only.

It may NOT be the cause of your problems(fuel curve) I just know that on my D7, it was seriously LEAN in the mid-range.

IF you're absolutely POSITIVE you were out of that lean range, scratch that PC off of the list and take care of the rest.

Just trying to address/eliminate all of the reasonable/likely causes so you don't repeat this 2 weeks from now, that's all.

 

[beamslayer]

I was going to test my tps before I took it out but took a look at it and thought I should buy a plug because my alligator clips were not going to fit in there .Do you pull the throttle bodies off to check yours?

 

[skibreeze]

I just used the small female conectors on mine. I also cut metal shield back a little to allow more room to get to the plug easier. I also color coded my wires the same on my tester to make it easier to hook up.

Like these
http://www.snowestonline.com/forum/showthread.php?t=237163

 

[beamslayer]

So it seems everyone is leaning towards a fuel filter issue after I change the filter is there a way to check injecters? How is everyone making out with the napa gold set up for the filter?Why would only one side go down if there was a clogged filter.I need to find the problem.

 

[Kraven]

700 DRAGON SEIZURE

So it seems everyone is leaning towards a fuel filter issue after I change the filter is there a way to check injecters? How is everyone making out with the napa gold set up for the filter?Why would only one side go down if there was a clogged filter.I need to find the problem.

Agreed, you need to find the problem that caused the burn down(s)

BAD FUEL (As opposed to old fuel??) We didn't address this earlier, any chance of bad fuel, did anyone else fuel up with the same fuel??

CLOGGED FUEL FILTER , If you suspect the filter is clogged, remove it and try blowing through it.

BAD INJECTORS anything is possible, but I highly doubt there's an issue there. Some diesel places offer injector testing services.

FUEL PRESSURE IS SUPPOSE TO BE 58 P.S.I. whether you're idling or at full throttle. There are A/C style fittings on the fuel line. You can make a crude tester by obtaining the Air Cond line charge kit (from an auto parts store) and cut the hose end off, and attach it to a simple 100 p.s.i. oil pressure gauge. Duct tape it to the handle bars if you have to so you can monitor the Fuel Pressure as you're driving down the trail. You can test the fuel pressure right now (with the old filter in place) by hooking up 12 volts to the twin elec plug P.T.O. side, kinda near he hood hinge area, there's a pic of it under the ELEC FUSION 900 thread pinned at the top.

OIL PUMP Someone mentioned this earlier, and you responded with why would it then affect only one cylinder, look at the 1/8" lines that connect to the engine, make sure they are BOTH hooked up, and make sure they BOTH have oil in the lines. How does the engine internals look on the bad cylinder? Oil residue on the rod + crank+ case or are they dry, blued (rod bearing area) ?????

T.P.S. I remove the throttle bodies and test them that way as a matter of convenience, and use the $48.00 tester from POLARIS , it has the nice factory plug on the end of it, although not necessary, it makes it a little easier.

 

[xc6rider]

Piston top does look lean, but it also does kinda look like a cold seizure. Hard to tell. Is the crown burnt or pitted anywhere?

Is the cylinder by chance cracked anywhere into a cooling passage? Does teh coolant look good, or does it have crap in it.

 

[ak2co]

there is a place in idaho http://www.witchhunter.com/

that test cleans and tests again injectors under a 100 for 4

did that on my 06 700 and they found one injector that was effed up and caused similar problems on one side.
well worth it and after they are cleaned good injectors get better
quick turn around about a week for mine , not sure how busy they are now

 

[beamslayer]

No pits or marks on piston Cylinder is cracked on exhaust port and on the skirt anti freeze looks good.What makes you think it was lean by the wash on the piston.I let it warm up until it reached 125 and the temp dropped to 118 and stated to climb than we rode around 3/4 to a mile before I went wide open .