• PlowSite Homepage Upgrade

    Hello again PlowSite community,

    I wanted to post a quick note to let you know that the homepage of PlowSite will experience a major upgrade next week. We’re always looking for ways to improve our users’ experience on the site, and felt that this upgrade was needed and long overdue.

    With this upgrade, you’ll now see the top trending posts as soon as you visit PlowSite, and these will be updated throughout the day. You can also easily access videos and photos. As always, we encourage you to include videos and photos in your own posts to share with your fellow PlowSite users.

    Be assured that all of the forums, content and data that you’ve been accustomed to will remain intact, as will all current site features. You’ll also be able to easily access the full list of forums directly from our new homepage.

    We’re excited to bring you this change, and look forward to hearing your feedback.

    Thanks, PlowSite Team

up and down rpm


Junior Member
chevy turck
i have a 98 chevy k1500 and i have replaced the fuel filter and fuel pump and the converter and installed a duel turbo exhaust, i have noticed that my rpm's go up and down when im cruising at a steady speed around town, the rpms only go up on tick on the rpm gauge but its very annoying to hear, can anyone tell me what could be causing this? i was thinking that it may be the injectors but it doesnt do this when its idling , it idles perfect( knock on wood) any comments would be greatly apprecitated .

John DiMartino

PlowSite.com Veteran
Sounds like the trans is going into and out of lockup,like it is hunting.Whenever it does it again,lightly ride the brakes as your driving without changing the throttle setting(just enough to light the brake lights),if it stops doing it,then its your lockup torque convertor for sure.This is in the PCM programming,and you may have to go to the dealer and get it reflashed,or if you have put in a Hypertech powerprogrammer,you may need to cal them to have the program changed/adjusted.If thisi snt the problem,id look into the EGR system,the EGR valve will cause the truck to slightly hunt when it opens,it isnt supposed to open until you are going fast enough about 45 so you dont feel it working.
Last edited: