REVO driving me nuts

[deputybill705]

Evening everybody. I have a new Revo with a 3.3 in it. It was broke in with the Traxxas method. The engine will not Idle. It continues to rev after I let off the throttle. I reset the needles to stock which are 4 turns out on the HSN and flush on the LSN according to the manual. I have taken the engine out and sealed it. The motor starts right up but will not idle long after it starts up. Right now I am at 6 turns out on the HSN which is way to rich. No matter what I do the motor will not run right. I have a 3.3 in my Rustler which runs great. I am open to all suggestions. I appreciate the help.

 

[Mcisaacracing]

Sounds llike LSN is lean if it's raving high

 

[deputybill705]

I richened the LSN a little at a time to about 3 turns out. That didn't help. I had a new tank sitting around so I replaced the tank and fuel lines. I'll try it tomorrow to see if that helped.

 

[chaos2767]

Idle gap @ 1mm?

 

[Mcisaacracing]

Running ez start still? Does it stall when you take glow ignitor off? To rich. If idle takes awhile to come down after a run, stays at high idle, lsn too lean

 

[deputybill705]

The Idle gap is 1mm. It does not die after I take the glow ignitor off. Yes it still has the ez start on it.

 

[chickenman242]

if all other suggestions don't work ,replace the engine bearings either there is play in them or you have a leaking front bearing .
cheapest way ,chop shop ,around 10 bucks in a new block can't beat it

 

[SMaxxin]

Did you try a new glow plug?

 

[deputybill705]

No sir I didn't try a new glow plug. I replaced the glow plug after break in. I have some spares so I will try that. I hope the fix is that easy.

 

[2revo1maxx]

Idle gap at .75 mm or less.
Lsn at 1.5 turns or less.
Hsn at 5 turns to start out, then tune from there.

If that doesn't work make sure your fuel tank, exhaust, and fuel lines are all bueno.

 

[hamz9561]

Idle gap at .75 mm or less.
Lsn at 1.5 turns or less.
Hsn at 5 turns to start out, then tune from there.

If that doesn't work make sure your fuel tank, exhaust, and fuel lines are all bueno.

I disagree with the idle gap. It should be about 1mm with the brakes on.

 

[deputybill705]

Thank you everyone for your replies. I'm working this weekend. I will take it out on Monday. I'll update with the results. Once again thanks for your replies.

 

[2revo1maxx]

All of my engines idle perfectly at less than 1mm.

 

[Rolex]

1mm is not law. Never was, never will be. It's a working starting point. If you set the carb at 1mm and make adjustments to keep it there, you'll have problems.
1mm usually gets you running and THEN it's a matter of adjusting the LSN and the idle screw till you get the proper idle and takeoff.

 

[2revo1maxx]

I've been going by what Robin from ERCM said for a few years now, it's by far the best tuning advice I've ever received.

 

[hamz9561]

+1 Trout. My 3.3 always did its best around 1mm of idle gap and as Rolex mentioned it is a good starting point.

 

[hotrodrob]

I agree with a 1mm starting point, I wind up about .80 or so in the end, depends on the time of year

 

[deputybill705]

Update on the Revo. I got it running pretty good. Wanted to thank everybody for there help. I have 4 Traxxas nitro vehicles and the Revo has been the hardest one to set up.

 

[SMaxxin]

Glad to hear you got it going!

 

[Rolex]

Good to hear. Keep us posted. We'll get you "tweaked" in.