2012 PRO RMK no reverse, hard start HELP

Hansen13 · Nov 18, 2017

2012 Pro with 3000 miles. Engine rebuilt couple years ago and sits at 120psi per cylinder cold.

For some reason takes 5-6 pulls to start cold, fine when it's warm. Won't go into reverse, idles around 1450-1550 RPM and no matter what I do it won't go into reverse. Yet sometimes it does, very rarely.

Today I re adjusted my TPS, figuring it was out of spec. I removed the cable (brand new) from the throttle, backed the set screw off on the throttle bodies, and set the base TPS setting to .700 +/- .01 V .. Then I turned the set screw in until I got .940 +/- .01V and set. Then I reconnected the throttle cable and adjusted the free play from there.

I'm kinda lost, everything else works perfect. Any ideas would be great thanks!! Wanna get out and break in the wife's sled but need mine running good too!

Hansen13 · Nov 18, 2017

Fired sled up later on, everything worked great... Wiring somewhere? Grounds are good.

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Murph · Nov 18, 2017

My first thought was TPS... but your procedure is spot on. Did you confirm 5.00 Volts on the signal wire to TPS?

Is your TSS bypassed with the aftermarket kill switch? The sleds won't want to go in reverse if the ECU thinks the throttle is being pressed.

Is there enough freeplay in throttle cable?

Super Dave3 · Nov 18, 2017

Belt deflection could be too tight. Thread the belt removal tool in a couple of turns and see if reverse works then.

Hansen13 · Nov 18, 2017

Murph said:
My first thought was TPS... but your procedure is spot on. Did you confirm 5.00 Volts on the signal wire to TPS?

Is your TSS bypassed with the aftermarket kill switch? The sleds won't want to go in reverse if the ECU thinks the throttle is being pressed.

Is there enough freeplay in throttle cable?

Yep I confirmed 5V before proceeding with the setup! TSS isn't by passed nope it fits right into the rsi heated throttle block I have.

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Hansen13 · Nov 18, 2017

Super Dave3 said:
Belt deflection could be too tight. Thread the belt removal tool in a couple of turns and see if reverse works then.

I will definitely check into that tomorrow. Assume the manual will have procedures for adjusting deflection as well if needed?

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Super Dave3 · Nov 18, 2017

I like to run my belt deflection as tight as allowed so the belt doesn't squeal at idle.

retiredpop · Nov 18, 2017

Hansen13 said:
Fired sled up later on, everything worked great... Wiring somewhere? Grounds are good.
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So adjusting TPS fixed it then?

Hansen13 · Nov 19, 2017

retiredpop said:
So adjusting TPS fixed it then?

When I adjusted it and tried, it didn't. But then went to move it later in the day and it worked fine. So I'm gonna do the belt deflection and set that up proper and make sure and go from there.

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retiredpop · Nov 19, 2017

Maybe a chipped or warped reed petal? Your idle is a bit on the low side so you could adjust the idle so it idles around 1700. That will increase your idle voltage somewhat which is perfectly okay and won't bother anything else.

Hansen13 · Nov 19, 2017

retiredpop said:
Maybe a chipped or warped reed petal? Your idle is a bit on the low side so you could adjust the idle so it idles around 1700. That will increase your idle voltage somewhat which is perfectly okay and won't bother anything else.

How do I increase idle?? New reeds just put vforce 3's in.

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retiredpop · Nov 19, 2017

With the same screw you set the .940V with.

retiredpop · Nov 20, 2017

Hansen13 said:
How do I increase idle?? New reeds just put vforce 3's in.

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That could be the issue with the low idle. It sounds like a common problem with the VF3 reeds.

https://www.snowest.com/forum/showthread.php?t=389193

Hansen13 · Nov 30, 2017

Yeah gonna go a couple rides on it and see if the reeds "break-in".. If not, I'm going back to stock and probably won't have any issues. Thanks!

Octanee · Dec 2, 2017

whats your idle rpm? I don't bother with the whole voltage thing for idle other than your base .700v, I set my idle to about ~2000, itll fluctuate from ~1850-2100 ish. may just be too low of an idle.

peaceofwork · Dec 3, 2017

Octanee said:
whats your idle rpm? I don't bother with the whole voltage thing for idle other than your base .700v, I set my idle to about ~2000, itll fluctuate from ~1850-2100 ish. may just be too low of an idle.

I had thought of this but thought it would throw off the base setting (basic reference) for the ecu.?
If you try it out report back on how that works,

Hansen13 · Dec 3, 2017

peaceofwork said:
I had thought of this but thought it would throw off the base setting (basic reference) for the ecu.?
If you try it out report back on how that works,

Yeah I'm definitely not trying that I believe there is a base setting for a reason. I am taking those JUNK vforce reeds out before next ride see how it works.

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richracer1 · Dec 3, 2017

peaceofwork said:
I had thought of this but thought it would throw off the base setting (basic reference) for the ecu.?
If you try it out report back on how that works,

Adjusting the idle screw will not affect the base setting. The base setting is adjusted by moving the actual TPS sensor, but the base setting should be checked before adjusting the idle RPM.

I set mine to idle around 1800 or so.

peaceofwork · Dec 3, 2017

It's hard not to notice the trend of 9v or 930, whatever it is... Does the book say at any point skip that crap and just crank the idle up to 1800rpm?

Hansen13 · Dec 12, 2017

Yeah it was bad reeds, went back to the stock reeds and all is well runs great!

2012 PRO RMK no reverse, hard start HELP

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