Mid throttle intermitent bog

[paramuir]

Ok

Just a question, sometime i notice a bit of a hesitation or a slight bog when the engine hits like 6000-6500 rpm, but its not every time, it pulls hard still when it passes this point.

just wondering if anyone might have a guess, set TPS not too long ago with my tester and exhaust valves are clean and all good to go,

wondering maybe a flat spot in the TPS?? any other ideas

thanks

 

[Danbot]

Sounds like a typical symptom of a bad spot in the tps, or possibly sticky ves valve(s)
Dan

 

[05900]

Ck ves valves and solenoid also throttle switch at pivot pin for dead spot.

 

[paramuir]

so this is what i cant find with the TPS tester correct? this is where i need an old analog tester. HOw much is a new TPS? Whats the hazards of riding it like this for now

 

[wysnow]

tps and your valves have nothing to do with it. it is a lean spot in your fuel mapping. you probley even notice that in that range you let out of the gas the motor will studder. we are having the same problems here as well with this.

 

[paramuir]

where is here?? also fuel mapping isnt that loaded up from the dealer?

I am a flatlander there isnt really any elevation to ride here if that affects any diangnosis

 

[Danbot]

tps and your valves have nothing to do with it. it is a lean spot in your fuel mapping. you probley even notice that in that range you let out of the gas the motor will studder. we are having the same problems here as well with this.

I have never experienced a hesitation, stutter, or bog with my 900, and I was not aware of a lean spot in our fuel maps. I don't mean to bash your opinion, I may be wrong.... but I have never seen this discussed before. So many of us have great running 900's.

I stand by my opinion that something may be up with the TPS. And yes paramuir, to check for bad spots in the TPS you need to check it with a quality analog ohm meter. With slow gentle sweeps of throttle you should be able to see the needle of the meter twitch or drop right out of range when it passes the bad spot.

Good luck, Dan

 

[wysnow]

i live in wyoming we ride any where from 6000-11000 ft we have tried everthing throught the dealers. we think it is a lean spot cause it is bouncing between the to top injecters and the bottom 2 it cant make up its my what to do. untill u get out of that range then it will run fine. i also have been hearing that it has been happy down at lower elev. aswell.

 

[SwitchbackRick]

Ok

Just a question, sometime i notice a bit of a hesitation or a slight bog when the engine hits like 6000-6500 rpm, but its not every time, it pulls hard still when it passes this point.

just wondering if anyone might have a guess, set TPS not too long ago with my tester and exhaust valves are clean and all good to go,

wondering maybe a flat spot in the TPS?? any other ideas

thanks

My 06 Switchback is doing the same thing at 6500...i cleaned the exhaust valves last week, just had the tps set by the dealer and still have a bog. Some times it does it sometimes not?! Might try new tps, just not this week, tired of wrenching on this thing.

P.S. Can anyone get the 115 belts cheaper than $200.00 canadian?

 

[Redd]

will the tps flat spot cause it to run "lean" at that paticular flat spot?

 

[joshlessman]

I had a 06 700 that blew up so I put a 900 in it. After we put the 900 in it had a dead spot between 5400 5800. We rode Wyoming and Colorado, moved to Northern Minnesota am now running 76g weights and have the same dead spot at the same RPMs. I was thinking it was a clutching problem but am not very savey with clutching. I am a new member to this site and was hoping to get some good advice. Looks like you guys know what you are talking about, Ill be looking into the posts. Any help or ideas would be great.
Thanks

 

[Chevyho]

I am having the same type of bog... Reset tps, no help. Checked tps for flat spot, very smooth across the board. Cleaned exhaust valves, no help. I am starting to think it is in the clutching. I think it is in my secondary though, could it be in part to do with the helix angle?

 

[SwitchbackRick]

I am having the same type of bog... Reset tps, no help. Checked tps for flat spot, very smooth across the board. Cleaned exhaust valves, no help. I am starting to think it is in the clutching. I think it is in my secondary though, could it be in part to do with the helix angle?

I'm having the exact same problem, and not very good with clutches. Any ideas anyone?

 

[paramuir]

keep talking this is got to come to an answer at some point for all of us.

 

[guidoxpress]

you all talk about "cleaining your exhaust valves" but have you inspected the bellows in there (orange diaphrams) if there is ANY holes in them, they will cause a bog in the 5400-6000rpm range...

same with aflat spot in the TPS, AND if you have the old TPS wiring harmess...either replace the wiring from the connector as far back as you can...or get the updated TPS harness for $35...

might even want to replace the exhaust valve springs...they will sag over time...

 

[paramuir]

yes replaced one bellows it was almost worn out....close to having a hole,

as for the wiring harness how do i tell if its an old one or new one...i have had the sled for 2 years i havent changed it,

havent changed the springs at all

 

[2poor]

I have 2 06 900 RMKs that have been heavily mod on both. One of them has a 1140 kit and the other has a turbo and both have the same problem when the second injector comes on. You can put a controller on and you can program around the bog some but it is just the nature of the second injector coming on and clutching. The 1140 I have got it almost out but you still feel it if you are going down a trail and you set your rpm around 6500 to 7100 when the second set comes on. I have worked on this one for 2 years and this is the only one that I have got it almost gone.

 

[SwitchbackRick]

thanks for the input...I think I have pretty well given up on the issue. Just ready to ride.

 

[cr2nuts]

Good luck with this one, had a bog at around 4500 rpm put on new tps harness and bought a different throttle body w/ tps sensor installed. Still does it. Remember the 05 has two injectosr the 06 has four, or at least thats what they told me.

 

[Chevyho]

what was the reason for the tps harness update? Symptoms?