Issues with 2002 Mountain Cat 800 EFI

M

mblanken881

Active member

Nov 27, 2007

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Sioux City, IA

• Dec 3, 2008

• #1

My buddy was riding his '02 Mountain Cat 800 EFI a couple weeks back and it just quit on him. He said it just slowly started losing power and then quit. Now, when he tries to start it, it will start and run but then back fire and quit again. Any ideas? Thanks, Mike.

 

B

BottomFeeder m7.

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Nov 26, 2007

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• Dec 3, 2008

• #2

check ur power valves.///cables.

 

89sandman

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Oct 16, 2004

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southern oregon

• Dec 4, 2008

• #3

throttle override safety switch??? bad fuel pump???

 

T

teammugad

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Nov 26, 2007

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Helena,MT

• Dec 4, 2008

• #4

Check the fuel filters in the tank. There are 2 of them. You can fish them out with a coat hanger or take the fuel pump out. They are cheap to replace and the beat place to start. If they are collapsed then you need new ones. Hope this helps.

Kory

 

Z

ZRrrr

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Dec 6, 2007

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Edmonton

• Dec 4, 2008

• #5

Check for a broken wire to the temp sensor and air sensor. It may have gone into limp mode.

 

M

mblanken881

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Nov 27, 2007

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Sioux City, IA

• Dec 4, 2008

• #6

Thanks for all the advice guys. I'll pass it on to my buddy. Please keep passing on your advice. Thanks, Mike.

 

S

sidehill

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Nov 26, 2007

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• Dec 4, 2008

• #7

Do a compression check on it.

 

D

diggerdown

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Apr 25, 2004

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Deer Park Wi.

• Dec 5, 2008

• #8

teammugad said:

Check the fuel filters in the tank. There are 2 of them. You can fish them out with a coat hanger or take the fuel pump out. They are cheap to replace and the beat place to start. If they are collapsed then you need new ones. Hope this helps.

Kory

Click to expand...

If replacing the screens don't help, you could have a fuel pump going out too. Check the pressure and flow. Should be at least 45lbs. I think new they were around 52 lbs., but they run better a little less.

 

C

ccpowder

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Nov 27, 2007

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South Jordan, Utah

• Dec 5, 2008

• #9

yep, sounds like a fuel pump to me.

 

M

MT rydn

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Mar 7, 2008

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• Dec 7, 2008

• #10

had similar problem. was fuel pump in this case.

 

T

twistedtunnel

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Dec 6, 2007

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• Dec 13, 2008

• #11

definately fuel pump, I went through 3 or 4 of them on one of my 02 Mcats, same situation. You could try jumping the fuel pump to get it started.

 

M

mblanken881

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Nov 27, 2007

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Sioux City, IA

• Dec 13, 2008

• #12

He tore down the motor and found that the mag side piston had a hole in it. Any ideas on why this happened?

 

D

davidd

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Dec 8, 2008

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• Dec 13, 2008

• #13

I was just going to say that it blew up. My buddies 04 MC 600 did the exact same thing at 634 miles. All maintenance was done right, correct fuel, water remover in the gas, etc. I guess these things just happen. Good Luck getting it going again.