No fix for hanging throttle? - Page 3 - HCS Snowmobile Forums

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Old 02-12-2020, 10:27 AM   #21 (permalink)
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Quote:
Originally Posted by patrioticinnovations View Post
Personally, I'd be suspicious of a poorly set TPS. These are not adjustable and are set by airflow when made at supplier. If this isn't done correctly, and it wasn't on the 800's, it will be a potential problem IMO. If it reads low at idle, it may reduce fuel flow enough to cause this. The reflash might be making this worse.

A Bully Dog GT gauge displaying throttle percent and an O2 sensor being monitored while running a good one versus a bad one should help determine this.
The re-flash made my hanging idle worse.
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Old 02-14-2020, 09:34 AM   #22 (permalink)
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lengthy talk with joey yesterday at BMP. the ones doing this have had motor issue's. bad crank seals and the bearing issue. also we have found air leaks at the reeds. we now use 4 gaskets on these. one on each side of the reed.

so on this one trouble sled. the det senor and the head bolts were basically hand tight. i held the 3/8 drive ratchet at the head of it not out on the handle and removed everyone of them? suppose to be 25 ft.lbs? it was definitely not. now i'am thinking v-force reed / adapter air leak? stay tuned as we dig into this today.

i put a SLP head on my 850 my head bolts were tight. this sled was not? Monday morning or Friday afternoon? we have found a number of det sensor's loose on the 850's? again why? vibration or somebody's torque wrench not set right? these are air driven torque wrenches used at the factory. we all have seen the over torqued chain case fill plugs. so anything is possible? it all comes down to quality controller or lack of it?
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Old 02-14-2020, 10:12 AM   #23 (permalink)
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Jesus. Makes a guy feel all warm and fuzzy to think about buying a new sled. Any brand. It's nothing but issue after issue, wtf. I guess I will just throw another $1000 at my sled this off season and keep riding it. For the 1500 miles I get to ride a season, it's plenty good.
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Old 02-14-2020, 08:37 PM   #24 (permalink)
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Check the belt for adjustment on the secondary. I had no issue with old belt, put new belt on and felt like the throttle was hanging a bit. I made an adjustment to loosen the belt and now the issue is gone.
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Old 02-14-2020, 10:07 PM   #25 (permalink)
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My pro r 800 had a hanging idle. I got fed up and knowing that a tiny increase in throttle opening at idle is huge. I found my tps setting was at the maximum value. So I spent time to set it to the lowest acceptable value. That fixed my hanging idle for good.

The first 25% of idle opening is the largest effect on increasing rpm. That's why the throttle cable at the throttle bodies is on that eccentric cam. To allow smoother (slower) acceleration at the throttle lever.
patrioticinnovations and cfm like this.
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Old 02-15-2020, 09:24 AM   #26 (permalink)
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I see that Presicion EFI just released a tune for the 850 - anyone heard anything about it?

https://www.precisionefi.com/850-patriot-stage1
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Old 02-15-2020, 10:35 AM   #27 (permalink)
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Stage I 170 hp. That's stock hp.
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Old 02-15-2020, 12:07 PM   #28 (permalink)
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noticed that, wonder where those 9 hp were found..
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