Bog above 3/4 throttle.

sks rider · Feb 27, 2011

Intake boots are fine. Stator tests good. Could it be the ves? Fuel filter?
It runs fine untill about 3/4 throttle..

No idea on this one.

05900 · Feb 27, 2011

Check fuel pressure and replace filter if you have not already this year.
You can remove VES covers and check bellows for leaks and at that time valves should move freely if they do not pull them and start cleaning, let us know how it goes!!

sks rider · Feb 27, 2011

05900 said:
Check fuel pressure and replace filter if you have not already this year.
You can remove VES covers and check bellows for leaks and at that time valves should move freely if they do not pull them and start cleaning, let us know how it goes!!

yeah. i never got around to changing the fuel filter this season. Ill have to order one.

guidoxpress · Feb 27, 2011

you should replace the fuel filter EVERY season.

get this one, WAY cheaper then polaris and a direct replacement, ive used these for 3 yrs...

http://cgi.ebay.com/ebaymotors/ws/e...0720447766&viewitem=&sspagename=STRK:MEWAX:IT

sks rider · Feb 27, 2011

guidoxpress said:
you should replace the fuel filter EVERY season.

get this one, WAY cheaper then polaris and a direct replacement, ive used these for 3 yrs...

http://cgi.ebay.com/ebaymotors/ws/e...0720447766&viewitem=&sspagename=STRK:MEWAX:IT

Thanks guido! I know i should have replaced it. Just never got around to it. If thats my problem im going to be pissed. lol

POLZIN · Feb 28, 2011

Dead spot in TPS maybe?

sks rider · Mar 3, 2011

I dont know now. Its got a high idle now. KInda like an airleak. I replaced the fuel filter but it still bog/cuts out above 3/4 throttle.

Where now?

sks rider · Mar 3, 2011

POLZINHUNTER said:
Dead spot in TPS maybe?

Would that cause a high idle and the symptoms i described?

POLZIN · Mar 3, 2011

probably not. just at one certain spot in the throttle (3/4).if you have a TPS tool and an analog meter its a simple check maybe your TPS is going bad who knows . as for the new symtoms you should go over your work if something new has started.

sks rider · Mar 3, 2011

POLZINHUNTER said:
probably not. just at one certain spot in the throttle (3/4).if you have a TPS tool and an analog meter its a simple check maybe your TPS is going bad who knows . as for the new symtoms you should go over your work if something new has started.

well it bogs at any throttle above 3/4....Youre saying if it was a dead spot that it would be JUST at 3/4?

All ive done so far is just replace the fuel filter. I dont see why that would cause a high idle. And the high idle isnt all the time. Like the first 2 times i started it up the idle went slowly up to 2100 or so. THen the 3rd time it idled fine(1600) for a few mins then went up to 2100.

f15ejedi · Mar 4, 2011

Noticed you have a FBF cable "set". Does that include the throttle cable and how long ago did you install it? Was it running fine after the cable was changed?

sks rider · Mar 4, 2011

f15ejedi said:
Noticed you have a FBF cable "set". Does that include the throttle cable and how long ago did you install it? Was it running fine after the cable was changed?

Installed it at the beginning of the season. Was running fine after that. Ive got 5 rides on it since i installed it. This is a new problem.

f15ejedi · Mar 4, 2011

I would set the TPS just because. Then pull the fuel rail and check the boots because an air leak might cause your symptoms.

sks rider · Mar 4, 2011

f15ejedi said:
I would set the TPS just because. Then pull the fuel rail and check the boots because an air leak might cause your symptoms.

Checking the boots is on my list.. Theyre brand new however. Only have about 5 rides on them.
And ill set the TPS as well.

Thanks for the ideas!

POLZIN · Mar 4, 2011

sks rider said:
well it bogs at any throttle above 3/4....Youre saying if it was a dead spot that it would be JUST at 3/4?

All ive done so far is just replace the fuel filter. I dont see why that would cause a high idle. And the high idle isnt all the time. Like the first 2 times i started it up the idle went slowly up to 2100 or so. THen the 3rd time it idled fine(1600) for a few mins then went up to 2100.

Yes thats what I meant. If you perform the ananlog test for dead spots you will see the voltage drop off at the deadspot . Possibly the TPS is failing and the new symtoms could be a sign of that who knows . is your idle normally on the high side or low side of the range normally.

When i switched my t-bodys my idle was right on the theh money @1600 the first time i ran it (They came from my other sled) then as it got warm the idle went up and the next time I started it it was at 2100 rpm for 45-60 seconds. so I just adjusted it when warm now it idles cold at 1500 and is @1550-1600 when warm. I think there is a fine line where this is concerned and a full warm up seems to change things just enough to tip the balance one way or another

j_gunderman · Mar 4, 2011

Same Problem

SKS did you ever find the issue. I have the exact same problem with mine. Went through same steps you have and still no luck.

sks rider · Mar 4, 2011

j_gunderman said:
SKS did you ever find the issue. I have the exact same problem with mine. Went through same steps you have and still no luck.

No I've been working on it today... now its idling at 2600. Still bogging at high rpm and now its backfireing. And this is after I set the tps.

Sent from my Droid using Tapatalk

j_gunderman · Mar 4, 2011

05 900 rmk

My 900 idles fine 1550 rpm goes into reverse no problem and no back firing just bogs like crap above 3/4 throttle. Have done everything you have and still no luck. I will keep digging if I find anything I will drop you a line.

sks rider · Mar 4, 2011

j_gunderman said:
My 900 idles fine 1550 rpm goes into reverse no problem and no back firing just bogs like crap above 3/4 throttle. Have done everything you have and still no luck. I will keep digging if I find anything I will drop you a line.

Yeah. Im kinda lost right now. Since i dont have access to another 900 i cant really switch out parts.

sks rider · Mar 4, 2011

Soooo any other ideas. Its currently running at 2600 rpm. Bogging above 3/4 throttle and now its backfired. Thats when i shut it off and put it away.

So far ive replaced the fuel filter, replaced the bellows and cleaned the power valves, and reset the tps. Also checked for cracks around the tb boots.. None were found. All bolts are tight as well.

Any ideas?

Bog above 3/4 throttle.

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