Was just thinking about my problem witch is pretty close to your problem... Im wondering if my AFM has gotten a little moisture in it causing the door to move slower.. causing it to load up... Im going to pull mine off and bring it in teh house and clean it up and let it sit and warm up and try it and see if it works any better

I haven't had a chance to do anything on it as I've been busy. The problem seemed to go away a bit the other day but now it's back to being slow.

I do have a lot of play in the rear diff as I can hear the slap in it when I abruptly let of the gas. It also makes a deep pitched sound at high speeds. Could the rear or drivetrain be slowing it down somehow? I did hear some squeeling from it the day it got a little better. Hmmm...

Alright ...awhile back I posted about my loss of power problem. We checked the timing as suggested and it was way off even though the previous mechanic claims to have set it during a recent tuneup. After setting the timing, the truck runs much better.

The funny thing though is it is maxed out on the rotation of the distributor. Can it be that it had jumped a tooth on the timing chain? I can now hear a sound that may be the timing chain guide. Any thoughts?

BTW- Thanks for all the many helpful suggestions. And the rear noise was the u-joint.

Jumping a tooth would be very unlikely. What is more likely is that the distributor was removed and replaced one tooth off. This had happened to a truck I bought used. It can be corrected easily to restore your full sweep from advance to retard.(If that is what happened) Chain stretch can also affect timing.

I posted this a long time ago but only fixed the problem last month. It turned out the timing chain did skip a tooth somehow. The timing would not set up properly and the distributor needed to be turned all the way for it to be even close.

We replaced the chain with the cover assembly and reset the timing marks. It was off by one tooth. Voila! Now the timing is in the middle of the distributor adjustment and it runs great! Just wanted to get back to you all especially everyone who posted. Thanks for all the great suggestions. <img src="/forums/images/graemlins/smile.gif" alt="" />