Polaris 975 electrical issue - Try and solve this one?????????/

ericbigbore · Dec 13, 2008

My 975 is having issues again, no reverse, low idle and OUT OF IDEAS!!!

Here's what I've done in the last 200 miles,

New stator - Fastrax installed

New voltage regulator - Carles installed

New hood harness due to melt - Fastrax

All wires inspected and fixed for wear - Carles and Fastrax several hours

Reverse switch tested and working - Fastrax

TPS inspected the harness and tweeked up a little - Fastrax

No Codes - Premier Polaris

New ECU - No change

We are out of ideas other than the rest of the wire harness, anyone have a clue?

Dogmeat · Dec 13, 2008

ECU fried somehow

ericbigbore · Dec 13, 2008

Dogmeat said:
ECU fried somehow

Swaped it with another and nothing.

happyfast79 · Dec 13, 2008

oil pump sticking full open , making it idle low and not giveing enough voltage to go into reverse? and you said you replaced the tps harness correct?

ericbigbore · Dec 13, 2008

happyfast79 said:
oil pump sticking full open , making it idle low and not giveing enough voltage to go into reverse? and you said you replaced the tps harness correct?

Justin at fastrax inspected the tps harness and said it's good but did not replace it. Oil line is new.

happyfast79 · Dec 13, 2008

for the price of the harness id probally replace it any way's polaris's wiring harness are so cheaply made that most of them break when you pull the engine or zip tye them up to tight.. sorry i couldnt be more help.

Dogmeat · Dec 13, 2008

ericbigbore said:
Justin at fastrax inspected the tps harness and said it's good but did not replace it. Oil line is new.

Fuel filter?

Super Dave3 · Dec 13, 2008

I would bet TPS or TPS harness.

ericbigbore · Dec 13, 2008

Dogmeat said:
Fuel filter?

it's new but it was ugly. I also added a fastrax fuel controller and haven't been able to set it up yet due to the problem above.

What do you think about clogged injectors?

Dogmeat · Dec 13, 2008

ericbigbore said:
it's new but it was ugly. I also added a fastrax fuel controller and haven't been able to set it up yet due to the problem above.

What do you think about clogged injectors?

I don't know, that kinda sounds unlikley ... have you cleaned your exhaust valves latley? I don't know if exhaust valve operation effects idle or if that's more for WOT operation .... perhaps one could be sticking?

If you throttle up a little bit will it hold at 2500 RPM or so? can you switch to reverse then?

ericbigbore · Dec 13, 2008

Dogmeat said:
I don't know, that kinda sounds unlikley ... have you cleaned your exhaust valves latley? I don't know if exhaust valve operation effects idle or if that's more for WOT operation .... perhaps one could be sticking?

If you throttle up a little bit will it hold at 2500 RPM or so? can you switch to reverse then?

I can throttle up but no reverse. Exaust valves are clean.

mtnclimber19 · Dec 13, 2008

I had a problem with my 900 not wanting to idle and nothing would happen when you hit the perc button. Replaced tps sensor and the problem was solved. There was no check engine light on anything to tell me there was a problem so I scratced my head for awhile like you. For less than $200 it might be worth a try. I feel your pain man:beer;

AKSNOWRIDER · Dec 13, 2008

Eric, I would do the tps harness first..then do the tps..is most likely problem...

Dogmeat · Dec 13, 2008

ericbigbore said:
I can throttle up but no reverse. Exaust valves are clean.

I would look at that TPS sensor again man.

I had the same problem you did last year. Exact same problem. It eventually evolved however into my sled would idle or run WOT but nothing in between.

I had one dealer look at it, and "supposedly" they re-calibrated the TPS and it was "fine".

Come to find out, and I dont even know if they did or not, the wiring harness had melted....

Put the new pigtail on, boom, problem solved.

If they haven't replaced the pigtail on it yet I would request that they do so as well as make sure the harness is routed so as not to be pinched off or can rub against the exhaust or anything anywyer.e.

I kinda have a feeling those TPS harnesses can befuddle you.

ericbigbore · Dec 13, 2008

I will order the tps harness next. It's only money........&%$#@#$#@&&^%!!!!

Dogmeat · Dec 13, 2008

ericbigbore said:
I will order the tps harness next. It's only money........&%$#@#$#@&&^%!!!!

I understand completley ... believe me, I really do understand completley

treedog · Dec 13, 2008

Eric,

WTH!!! LOL!!
I kinda hope your taking one for the 900 team this year!!

I don't really mean this........honest!!!!

-T
BTW: Electrical BLOWS!

JMHO!!

CATKILLER · Dec 13, 2008

my friend has a 2006 900 switchback and i seemed to be doing the same thing yours is doing .... what it came down to is he broke one of the motor mounts and the torq stops witch created more vibration than normal and the idle screw backed off witch made it idle really low and he couldnt get it into reverse..... just give it a try

rab · Dec 13, 2008

measure the compression if its low its the reason no reverse

idle up the engine with the idle screw( to hard to do with the filpper)now try the reverse

also if it works with idle turned up and compression is good try to set fuel screws out a little and try reverse

I have had all the above snags with the perc system and the low compression being the most prevalent

Good luck

Ps heard a guy had a bad crank (one lower rod bearing) and his reverse also didnt work

ericbigbore · Dec 13, 2008

rab said:
measure the compression if its low its the reason no reverse

idle up the engine with the idle screw( to hard to do with the filpper)now try the reverse

also if it works with idle turned up and compression is good try to set fuel screws out a little and try reverse

I have had all the above snags with the perc system and the low compression being the most prevalent

Good luck

Ps heard a guy had a bad crank (one lower rod bearing) and his reverse also didnt work

Brand new top end and 1 lung 200 miles ago and the crank was good. Turned up the tps a little and nothing. I think it still runs at full wood.

Polaris 975 electrical issue - Try and solve this one?????????/

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