Backfiring thru the throttle body

[SpyderWolf]

Gotta add that one to my list of technical terms! :thumbup:

:agree: I also like the "whack-a-moles" terminology.

 

[Campverdefela]

Bones:

Thanks a lot for the explanation. I was precisely looking for that kind of info.

As I tried to say before, it has nothing to do with the backfiring at the exhaust, usually caused by a leak at the system joints, thus allowing fresh air to be sucked into the hot gases going out, causing a small explosion.

Saludos, Pilo

Pilo, check the 4 bolts that hold the two exhaust pipes to the engine block. I found mine a little loose. I had a similar problem as you and have the same mods as you do plus the Juice box. This helped in mine situation, but beware I had to use every tool I had [almost] to get to the buggers....Dennis

 

[Pilo]

A little late...

Pilo, check the 4 bolts that hold the two exhaust pipes to the engine block. I found mine a little loose. I had a similar problem as you and have the same mods as you do plus the Juice box. This helped in mine situation, but beware I had to use every tool I had [almost] to get to the buggers....Dennis

Dennis:

Thanks for the advise, but it came a little too late...

Yesterday I spent the morning putting the SE5 together, to have it ready for today's rendezvous with the local bikers at the usual Sunday morning breakfast place.

During the week I will try to adjust those bolts by removing as little as possible of the body panels.

On th positive side, with the KewlMetal Air Filter Kit it is now a lot easier to get at those buggers...

Saludos, Pilo

 

[Pilo]

Everybody chip in...

Pilo, check the 4 bolts that hold the two exhaust pipes to the engine block. I found mine a little loose. I had a similar problem as you and have the same mods as you do plus the Juice box. This helped in mine situation, but beware I had to use every tool I had [almost] to get to the buggers....Dennis

Dennis and Everybody:

How easy or how difficult is to adjust your mix settings once you have your JB installed...?

What do you have to do to get it right...?

By the answers received I am of the impression that it is a sort of a trial & error process...

Thanks and regards, Pilo

 

[Campverdefela]

Dennis and Everybody:

How easy or how difficult is to adjust your mix settings once you have your JB installed...?

What do you have to do to get it right...?

By the answers received I am of the impression that it is a sort of a trial & error process...

Thanks and regards, Pilo

The Juice box is preset with a fuel curve specific for the Spyder with a free flow exhaust. I found it to be good the way it came and only made a minor change. So you should see a big improvement right out of box even if you make no further adjustments.

 

[Pilo]

O2 Modifier...?

Pilo- when you changed just the exhaust at first, the ECU had the ability to compensate, and add a little fuel. With a new air intake, the restrictive inlet horns are gone, and the engine has the ability to flow more air than the ECU can add fuel for. The mixture becomes too lean. A lean mixture burns hotter than a richer mixture, and can create 'hot spots', on carbon deposits or valve edges. When a fresh mixture hits the hot spots on the intake stroke, it can detonate, causing the backfiring through the throttle bodies. Adding more fuel with an aftermarket device will richen the fuel mixture, and cool the cylinder temps down, eliminating the intake backfiring.....

I now wonder if Evoluzione's O2 Modifier can make the job of enriching the mixture...?

Saludos, Pilo

 

[Justin]

My bike does this once in awhile. It runs mint but sometimes when I blip the throttle it burps out the intake. I'll check the bolts. I'm stock airbox with hindle. I just changed my plugs and they're golden brown.

 

[SpyderWolf]

I now wonder if Evoluzione's O2 Modifier can make the job of enriching the mixture...?

Saludos, Pilo

I have heard a lot of good reports on it from here, and am now waiting for mine to arrive. I still have the stock air box for now, and want to put my K&N air filter back in there. It was running way too lean when I first tried this, so I went back to the stock paper filter. I am hoping this does the trick, as I don't really want to buy a Juice Box right now.