Fuel Controller

[JSTYER]

Ok I took the broken up Hauck exhaust off my 06 Attak, installed a used stock pipe and muffler. Sled has a Dynojet power commander 3. Do I have to do anything with that fuel Controller now that I have stock on? I noticed when I start it it shoots up to 2000 rpm but then quick falls to 1000 or below.

 

[steiner]

Any other mods on the sled like an airbox mod? If the sled is all stock I really don't see the reason for running a fuel adder.

 

[JSTYER]

I am all new to the four stroke side so bear with me, the air box looks stock and when I open it there is nothing inside it. Is there supose to be?

 

[steiner]

There should be a prefilter inside and the air inlet should be at the bottom of the box. The opening should look uniform and clean if not someone modded it.

 

[JSTYER]

Yep air box looks stock

 

[steiner]

Really no need to run a controller unless you really want to.

 

[JSTYER]

Do I have to adjust it or anything? How do I do that or can I simply unplug it and it will be back to stock?

 

[maxdlx]

Just get a stock map to run in it. Won't hurt anything

 

[JSTYER]

How do you get a stock map? I don't know nothing about these 4 strokes, been riding SRX's for years

 

[sideshowBob]

I would just leave well enough alone. The change from the Hauck exhaust back to stock should have very little effect on the A/F ratio and if anything it may be a little rich depending on what program was loaded in the programmer.
I have gone from a modded stock exhaust to a Bender exhaust, to a Skinz exhaust, and back to a stock Apex mountain exhaust with the same Ulmer maps in my PC5 and the sled runs great....best with the stock Mountain exhaust.

JM.02c

 

[DTR 82-27]

If the sled is stock, you can just remove the PC 3 and it will run fine. The engine runs on the stock map in the factory ECM and the PC 3 just piggy backs on the stock ECM and adds a little more fuel fuel at particular RPM's and % of throttle for air box and exhaust modifications so the engine doesn't run too lean.
You really don't put a stock map in the PC 3. A so called "stock map" in a power commander would be a table with all 0's and the engine would default the the factory ECM map. Therefore there would be no reason the leave it on the sled.
If you do a search, you can see pictures of a modded airbox that is opened up to allow more air in and that's why a little more fuel needs to be added to prevent a lean condition. Without the modifications the engine may run a little rich if you leave the PC 3 on.

 

[maxdlx]

Actually there are alot of stock maps out there. They are not all 0's they are set to clean up problem areas in the stock ECM. To each his own I guess.

 

[JSTYER]

Ok, thanks for all the tips!