2011 ETEC 800 no top end power issue

[NoBrakes!]

Was out this weekend with a friend and his 800 started to bog bad then just wouldn't pull rpm in the top end. He went to the trailer, changed plugs and wires, checked rave valves for operation, inspected for anything out of the ordinary. It starts an idles fine but still wouldn't pull over 7000 rpm after re-assembly. Now we are thinking reeds? maybe a coil? It recently had a new stator and flywheel installed but ran good after... also when he put the new plugs in, one was easy to index but the other would either bee too tight or loose. Are there plug shims that need to be used? I've used them before in V8's but haven't had to change etec plugs ever... Thanks

 

[pfi572]

Check rave valve bellow’s. Could have one cracked .
Had this happen before and does exactly what your saying .

 

[slededjr]

Could also be clutch arms sticking. Ran into that numerous times.

 

[NoBrakes!]

Check rave valve bellow’s. Could have one cracked .
Had this happen before and does exactly what your saying .

Both of the valves react when the cover is off. the bellow is the rounded cup on top?

 

[NoBrakes!]

Could also be clutch arms sticking. Ran into that numerous times.

He had his clutch rebuilt recently as well but we will check this. thanks!

 

[NoBrakes!]

well we pulled the sled half apart and found a piece of foam in the throttle body! assembled it again and put new plugs and wires on it. still doesn't run right... pulled it apart again and found another piece of foam! where is it coming from lol

 

[NoBrakes!]

looked at the reeds after removing throttle bodies and they're fine so re assemble and try and get that one plug indexed...

 

[neilsleder]

well we pulled the sled half apart and found a piece of foam in the throttle body! assembled it again and put new plugs and wires on it. still doesn't run right... pulled it apart again and found another piece of foam! where is it coming from lol

That’s just the air filter lol.

 

[NoBrakes!]

All jokes aside lol, they didn't put any foam in the air box for dampening or anything? it looks like panel foam with glue on one side. cant believe there was a second fn piece!

 

[maxwell]

looks like the peice from the back of the airbox that goes between the box and the tank. Not sure how it got in there LOL

 

[deaner]

Was anything done to the sled recently before this started happening? Are you serious about that piece of foam in the throttle body??? Wouldn’t be the reeds. He would be experiencing the opposite....hard starting and poor idle and then smartening up up top. Like others have said, raves or clutching. If you’re serious about that foam then maybe a piece is somewhere inside it shouldnt be? Only other thing I can think of is fuel. Fuel pump or filter?

 

[NoBrakes!]

not joking about either piece of foam lol the sled was running well and we got to the back of Allan it started to bog so he limped it home. we took it apart and found the 1st piece, re assembled and ran like **** the next day in the staging area so disassembled and found piece #2. boggled and its too cold to test this week

 

[maxwell]

i had a 13 etec that the fuel pump was starting to go and it would bog on the top end because it couldnt supply fuel fast enough.

 

[pfi572]

not joking about either piece of foam lol the sled was running well and we got to the back of Allan it started to bog so he limped it home. we took it apart and found the 1st piece, re assembled and ran like **** the next day in the staging area so disassembled and found piece #2. boggled and its too cold to test this week

Also like you have some pecker head friends ?? Lol
Putting foam in air box ?

One thing that a lot don’t do is change the fuel filter yearly.

 

[NoBrakes!]

Im the only peckerhead around here and Im not playing the foam joke on him lol