Engine Reving High

[dgetson]

So I'm not sure if this is normal or not but it seems like my Savage (X 4.6 with F4.6 engine) has really high revs when I slow down or break. Its like when you down shift to early in a car and it revs really high. At first I thought it might have something to do with the transmission. I only made one adjustment on the transmission and that was turning the screw to make the truck shift earlier.
Is that where the problem would be or what else could be causing that. Or is that normal?


I did just install new clutch shoes and springs (it was doing the same thing before I installed the new clutch shoes. I also installed new bearings in the clutch bell as well).

 

[m411b]

It could be running way lean.

 

[dgetson]

The temperature of the engine is always around 230 to 250 and I have smoke coming out of the exhaust. Thats why i don't think that it is a lean issue. Could it have anything to do with the idle screw?

 

[maximusraylius]

If you changed clutch shoes and springs it might be idleinh to high now. If its not to lean. Bit you said it has good smoke and decent temps. So if idle it down. New springs might engage clutch shoes at a higher rpm than the old shoes.

 

[Jeremy]

Whats the temp outside ???

In cold weather u need to run richer

 

[dgetson]

Ya i changed to the aluminum hpi clutch shoes with the 1.0 springs. I did put the set screws in the clutch shoes. Should I have done that?

Ya even before i put the new clutch shoes on it was reving high when i slowed down from high speeds.

 

[Jeremy]

probably have a air leak ... test for air leakes

 

[dgetson]

The temp outside was about 50-60 degrees fahrenheit. So like 12 degrees celsius.

 

[dgetson]

Whats a good thread on how to check for air leaks?

 

[nitrobashin]

Check your clutch shoes sticking on the flywheel. Ihad similar problem when i changed al. shoes. The shoes were hanging open, I filed down very little, so it was smooth. Problem solved!Good Luck

 

[Jeremy]

http://www.youtube.com/watch?v=6xwDy-I0Z4I

 

[Pope]

Just because the temps and smoke are okay doesn't mean that the tune is exactly right.
https://www.hpisavageforum.com/forums/showthread.php?t=12260

 

[dgetson]

Ya i changed the low speed needle and it seems to rev normal now. It also sounds way better. Now i have a problem with the transmission spinning the rear drive shaft. I have to take that apart now and see whats wrong with it. Since its not spinning the rear differential or rear driveshaft at all there must be a missing set screw or something.

 

[Pope]

Before you take it all apart check your grub screws

 

[dgetson]

Ya it was the rear grub screw that was missing. wanted to drive the truck today so i just took the front on and used it in the rear. The truck needed a good bashing today.