[redfirecat03]

My F5 runs like crap- it won't go over 40 mph and sounds like a sick cow. After reading previous posts about similar problems I took the power valve servo cover off and checked the cables- they were both still connected. Next I put it on the stand and and ran the sled while watching the servo operation. It only moved a couple of times during 10 minutes of reving it up and down. It would only rev up to 6000 rpms.

My question is when should the servo move- everytime the motor is reved up? If it is that must be my problem.

To make things worse I had to ride my buddy's wifes sled- a two-up Doo- how embarrasing! At least it was dark out and nobody saw me (actually it was a pretty nice cruiser)

Then to top it all off I hit a raised manhole cover and I was bucked off like a little man riding a fat chick!
I bent the trailing arm pretty bad so now I gotta buy a new one.

Just another typical night of sledding I guess.

 

[duality]

I dont believe that the servo motor operates until 65-6800 rpm,you may want to re-check them again with a slightly higher rpm.

 

[f5sweden]

It cant be the power valves, the sled should go much faster even without the power valves operating at all.

 

[redfirecat03]

Forgot to mention-I checked all the obvious things- plugs, track, belt etc.

 

[Tahoe32]

Valves are sticking. Had the same problem. Sounded just like you sad a sick cow. The sled ran great up to 40 mph and then nothing.

 

[redfirecat03]

Tahoe- did you clean the APV's youself and if so what is the procedure?

Thanks for the info.

 

[f5sweden]

Originally posted by Tahoe32@Dec 29 2002, 10:20 AM
Valves are sticking. Had the same problem. Sounded just like you sad a sick cow. The sled ran great up to 40 mph and then nothing.

Dose the valves stick in open or closed position to get this behavior from the engine?

 

[jleosnow]

Originally posted by redfirecat03@Dec 29 2002, 09:30 AM
Tahoe- did you clean the APV's youself and if so what is the procedure?

Thanks for the info.

redfirecat03,

You will find the answer to your question with the link below.
-John

Cleaning APV's

 

[redfirecat03]

Thanks John- I'm gonna go disconnect the cables and pull on them right now.

I will post results afterwards.

 

[redfirecat03]

I'm screwed- I unhooked the APV cables from the servo and pulled on each one and the valves are not stuck. I can feel them pull up and then they snap back. Maybe it's the servo motor itself not working properly.

So now it's off to the Cat dealership and let them take of it.

Another Firecat down- this is not good! :angry:

 

[Thumper]

It is NOT your valves, the sled would run way better than this if they were totally inoperable. The reason you are not seeing them open is because you cannot hit high enough rpm. You have a more serious problem. I will not specualte because it could be anything from electrical to cooked motor. Change your plugs and if it does not improve take it to dealer for diagnosis.