Yep they like plugs. If you go with iridium plugs that problem is going to go away. however they are 25 $ a pop. If I let mine idle to long she will do that during the warmup stage after it reached 80 if you give it a bit a gas it will prevent fouling plug. But don't rev it to high until she reaches a good 100.

 

I never fouled a plug while I was on a run always in start up mode.

 

We have been out for rides no problem at all just when warming up.
Have you had this problem with the iridium plugs on warm up?

 

Mine does this from time to time too and I don't know why, when I used iPone oil I honestly had a set of plugs to warm up on and a set to ride on.. Subbed to hear peoples input.

 

I have 3,200 miles on my '13 Indy and have never fouled a plug yet (knock on wood).
I've used VES from day one. It may have something to do with it, or I've just been lucky.
If the hood had to be pulled to change plugs on every ride, I wouldn't be a happy camper.

 

When I used iPone it was bad, with Legend it seems okay. You can change the plugs with the hood on, at least that's the way I've been dong it! What's your oil pump set to? mines 53:1 avg

 

I'm running polaris VES oil One thing that is been consistent is both times it's done and it's been above 32°.

 

I would be checking the t-map sensor. pins #1/2 is temp. and does the water temp match the outside air temp? or close? what is your oil usage?

this is how this system works. the ecu see's the water temp. if under 86 degrees it goes in to enrichment mode. (more fuel) like a electronic choke. once in this mode it adjust the injector angle or duty cycle based on info from the t-map sensor.(warm or cold) it will add or subtract fuel based on this. once the water temp reteaches 86/87 degrees this enrichment mode shuts off. so if both times it was above 32 degrees ambient air temp then I would think the t-map sensor is not ready right? one other thing it could be is a faulty ex. temp sensor. this is a motor protection sensor. if it's reading to cold based on sled run time, water temp, rpm, etc. it will keep adding fuel and retard the timing to correct this. if it's to hot it adds fuel and limits rpm's. if you are getting very poor fuel mileage and fowling plug's don't over look this either. c.f.i.'s shouldn't fowl plug's at all. if they do something is wrong?

 

always good explanation. Are you saying if the temperature is 32° out in my sled reads 41° somethings off when I first start up. my only problem is I don't have anything to check that stuff so to take that to a dealer.

 

Last time I fouled a plug it was -20 f outside. The first year she fouled about 8 plugs. then I switched to iridium for the following year never fouled a plug. this year I went back to reg ngk plug and she fouled one so far but she did idle for a good 5 min. beside that she runs like a champ. water temp sensor seems accurate. Rick I will check the t-map sensor. She really is int bad like she use to be so I kind of neglected it i am so busy in the shop now...

 

FYI

T-Map sensor check
Pins 1 to 2 (Temperature) (OHMS)
59 F (15 C) = 3000
68 F (20 C) = 2500
77 F (25 C) = 2000
Pins 1 to 4 (Pressure)
Pins 3 to 4 (Pressure)
2400 - 8200
3400 - 8200

 

Where is the t-map sensor is this right up front by the oil tank.

Does anyone have a picture of it

 

I have the ethanol switch on and I'm not sure about oil yet I just got the sled and it has 1500 miles. it's definitely using oil and I have the oil Cap from NorhtstarRick. I have not checked the ratio yet have not put enough miles on it yet.


I'm starting to understand this more by measuring these different ohm loads I can tell what is wrong either the T map sensor or the Ex temp sen

But still very confusing to me how I check them where do I put the meter I looked on YouTube and could not find anything

 

Has it always been in the ethanol mode?

Sent from Snowmobile.com Free App

 

Yes since I've owned it. I have always run 91 octane but not always ethanol free

 

OK guys let me clarify a few thing.

It is not the fuel mode (fouled plugs on both modes)
It is not the oil usage (yes in theory it can cause this ) however mine was doing it before and after I adjusted my oil pump.

I highly doubt its the coolant temp sensor as my sled temperature runs about 124 to 127 is which is normal t stat range.

i highly doubt it would be the exhaust temp sensor as the machine is a bullet and works like a charm, docent foul plugs when riding only when idling. and she is good on gas .

what I think it is as a bad ecu map or a defective t-map sensor.

note that all of my friends that have a 13 Indy have the same problem (3 of them). They bought theirs to the dealer thinking it was warranty and they all came out of thet with a 160$ (cleaned power valve)bill and the problem is still there.

I just thrown iridium plugs and did not have any more issues . I know its a bandage solutions but i just haven't had the time to look into it.

 

Well I went and bought the NGK iridium plugs it just started up and didn't foul today but I was in the mid-20s. I still would like to try and figure this out I don't understand how to test T-Stat sensor.

 

Think about this. I've never fouled a plug,I change them 6-800mi at $7.00 I'd rather change them in my garage than on a trail @-10deg. I run good oil Legend @56.8-1 This post I'm attaching is from 4-14 I thought I had a big problem with all the build up in my exhaust ports but it turned out to be ALL CARBON build up that wiped away clean with just a rag. The build up on the exhaust valves was normal for the miles on the sled. In my opinion and a few others that took interest in this is that the engine runs rich,not oil rich fuel rich which isn't that bad of a thing. At least it's not running lean, I did a mileage to fuel test and at 55mi and 4.3 gal I'm getting 12-13mi a gal, and pretty hard trail riding. So TIFWW it's jmo http://www.hardcoresledder.com/forums/552-indy-pro-ride-chassis/1132089-pistons-skirts.html

 

I tested my t-map sensor before I went for a drive yesterday and it was reading 2700 ohms at about -10 c so I was in a hurry and didnt paied much attention to it i will take it appart and bring it into the house and test it over the weekend . IMO I think it's shot I'll keep you guy's posted

 

FYI I tested the t-map sensor and its within specs.

 

My 14 800 had fouled out 2 times with the extra oil in the tank from running it twice in shop. Didn t start the third time. The extra oil is a contributor. I just pulled the plugs,cleaned & torched them dry. Since that first tank its been good. But I tell u I don t let it sit & idle for any amount of time. I can tell the thing runs real fat when warming up. I m afraid if I let idle to long it will foul out. So I don t. If I let warm up to 70 degrees ,thats the longest it warms. I just baby it until its warm.

 

. If I let warm up to 70 degrees ,thats the longest it warms. I just baby it until its warm.

Same here. Havent fouled a plug.