Bog/backfire . Won't rev over 5500 rpm - HCS Snowmobile Forums


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Old 01-10-2017, 10:40 PM   #1 (permalink)
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Default Bog/backfire . Won't rev over 5500 rpm

I have an 1100 turbo. Speedwerx 240hp tune, td 2.5" exhaust. Was perfect for a while, then I experienced a wierd bog backfire when I hit it. Did it once then went away. Then next ride out it started to get progressively worse. At first it wouldn't rev over 6500, then 6000 and now 5500. Ran 2 full tanks of gas through and still getting worse. Doesn't matter if I'm full or near empty. Tried adjusting throttle Cable, no difference. Tried disconnecting tss, no difference . What should I look for next? I double checked all boost tubes, they look good. It does it under load or not. I'm stumped !
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Old 01-10-2017, 10:59 PM   #2 (permalink)
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You might want to have a look at your turbo impellers.
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Old 01-10-2017, 11:02 PM   #3 (permalink)
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X2 it sounds like turbo went out. That would be a good start anyway.
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Old 01-10-2017, 11:03 PM   #4 (permalink)
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Any oil in boost tubes?
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Old 01-10-2017, 11:30 PM   #5 (permalink)
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Check fuel pressure regulator vacuum hose.
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Old 01-10-2017, 11:41 PM   #6 (permalink)
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Quote:
Originally Posted by GreenInMyVeins View Post
Check fuel pressure regulator vacuum hose.
Out of curiousity, is it common for these to come off?
Where is it located?
Thanks in advance.
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Old 01-11-2017, 06:40 AM   #7 (permalink)
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Quote:
Originally Posted by Hodgric View Post
I have an 1100 turbo. Speedwerx 240hp tune, td 2.5" exhaust. Was perfect for a while, then I experienced a wierd bog backfire when I hit it. Did it once then went away. Then next ride out it started to get progressively worse. At first it wouldn't rev over 6500, then 6000 and now 5500. Ran 2 full tanks of gas through and still getting worse. Doesn't matter if I'm full or near empty. Tried adjusting throttle Cable, no difference. Tried disconnecting tss, no difference . What should I look for next? I double checked all boost tubes, they look good. It does it under load or not. I'm stumped !
Did you ever gap your spark plugs?
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Old 01-11-2017, 07:21 AM   #8 (permalink)
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Quote:
Originally Posted by canoehead View Post
Out of curiousity, is it common for these to come off?
Where is it located?
Thanks in advance.
I've seen it happen. Next to plenum on fuel rail, PTO side.
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Old 01-11-2017, 07:55 AM   #9 (permalink)
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They crack after about 4 or 5 years also.
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Old 01-11-2017, 08:02 AM   #10 (permalink)
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Make sure the motor is getting air,filter is not plugged, has this started after being in storage, good luck
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