1100 turbo backfire

[Jimb]

Both sleds have the evo 215 flash, both have shorei light batteries, buddies sled has home made straight pipe, I have turbine tech 2.5 divorced wastegate and straight pipe.

This weekend mine would intermittently hard backfire and pop on wo throttle only. And seemed only when motor got hot, odd as that sounds. If I let the sled cool off for 5 minutes or make hill climbs and coast down to cool it was fine. NO codes ever, switched the ecu's did the same thing only on mine regardless of which ecu was on it. Couldn't find any electrical. Seemed worse on full tank fuel after half tank gone would never back fire. after a half day of riding it was better. I've searched several forums you guys think it could be the 2.5 pipe?? Plugs? Throttle cable seemed ok. It's weird because the two sleds are the same less the pipe. Last year never did this ever with the homemade straight pipe. Also if I was climbing and it started to stumble I could sort of get rid of it by working the throttle with a few pumps. Still there just less obvious. Was not rev limiter either I am sure.

 

[b1dodge]

If you are certain its not on the limiter (8500) then I would change out the plugs to a NGK CR9EB with a .025 gap. This is an update for our Big Chute and Super Chute kits but have also seen this issue on stock sleds. Theres no reason for it as we have many stockers out there without this problem. We have a 2012 that is stock with pipe that did this.One day the sled would run fine and the next it would miss and backfire under load. The cure was .025 plug gap (factory is .032-.035ish). The increased power from the 215 flash as well as intake and exhaust mods compounds the problem. Very cheap fix, just a little hassle on the install.

 

[Jimb]

Thanks for the plug number I was thinking the same OR next trip out try it with my old straight pipe and stock manifold. Not sure which is more work changing plugs or the whole pipe back, lol.

 

[Turbo11T]

Thanks for the plug number I was thinking the same OR next trip out try it with my old straight pipe and stock manifold. Not sure which is more work changing plugs or the whole pipe back, lol.

Plugs are not that bad to do.

 

[Jimb]

What's the way to do it? I had it apart last weekend down to panels, hood, fuel tank shroud off, but never looked past there. I could touch the boots but a guy must have to take the vert steering and top cross members off??

 

[Hillclimbpro]

What's the way to do it? I had it apart last weekend down to panels, hood, fuel tank shroud off, but never looked past there. I could touch the boots but a guy must have to take the vert steering and top cross members off??

No need to do all that, just take the hood off and you can change the plugs.