2002 800 twin problem

A

arcticfreak

Free Member

Feb 14, 2015

1

0

1

• Feb 14, 2015

• #1

Hey guys I have a 2002 800 efi twin mountain cat that I just got from Craigslist. I started ridding and noticed that whenever I hit the 6000 rpm mark my engine starts to stutter and lose speed and power. Also when I give some throttle it would hesitate for couple seconds and the engine stalls and then take off. I can barely hit the 60 mph mark on packed snow. Is it the efi itself or maybe I need to clean something out? Can anyone help? Thanks

 

J

j()()se

Free Member

May 8, 2009

49

6

8

• Feb 15, 2015

• #2

First thing I would check is the throttle safety switch. You can bypass it easily to see if it fixes the problem.

 

S

Sledbrain2

Free Member

Dec 7, 2007

1,010

160

63

Elkhorn NE

• Feb 16, 2015

• #3

Could be a lot of things, fuel pump, injectors, clutching, spark plug wires, tps. I had a 02800 efi for almost 10 years, I would suspect the stator but there are many other things that could produce the same issue.

 

J

j()()se

Free Member

May 8, 2009

49

6

8

• Feb 16, 2015

• #4

For sure could be a number of things, but I like to rule out the things the are easy to check. A bad tss can cause those issues, and you just need to unplug it and go for a rip to see if it fixes the issue (note your kill switch won't work with it unplugged)

 

Idcatman1

Well-known member

Lifetime Membership

Nov 26, 2007

900

125

43

Ashton, Idaho

• Feb 17, 2015

• #5

Take the cover off your power valve servo and so you can see if it is working properly and check the cables.