Jump to content


Puppy Poster
  • Content count

  • Joined

  • Last visited

Community Reputation

0 Neutral

About Bigl62

  • Rank
    Engine Started

Profile Information

  • Location
    Sherwood Park Ab

Previous Fields

  • Make
  • Model
  • Year

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1. Talked to a mechanic and first thing he asked was “how does it start”. For the most part good, occasionally it takes longer. I did change the boost sensor, it was carboned up really badly, that said haven’t noticed too much difference in performance.
  2. Having this problem occasionally and seems more common when it’s cool out. Truck is a 2014 with mp8 that has 550,000 mi on it. Injectors were updated after only 150,000 mi. Only code showing is p200200 which has been active for quite awhile. Doing long haul work between Edmonton and Houston. Asked the dealer and they said it could be injectors. However they wanted me to give them the go ahead to do up to 8 hrs of diagnostics. I left after telling them to get bent. Any ideas???
  3. Sounds logical. Will try this.
  4. Having what could be related issues. Truck just died while travelling, roll to a stop, check for codes and there’s nothing. Turn the key and the truck starts and runs normal. This has happened twice. Then today when bobtailing I had a sluggish throttle/turbo. Then after shutting truck off and restarting it now seems normal again. The truck is a 2014 with 760,000 Kim’s on it.
  5. Anyone have any success story with tuning a mp8. I have a 2014 rated 505hp. Would like better performance and contemplating tuning it. Looking for ideas and experiences.
  6. Bigl62

    Fuel mileage

    More info on the truck, 3:55 diffs, 18 spd, 22.5 Hankook dl12 tires, 670,000 km. Just had valve set done (said back 2 out by 40,000). I do calculate mpg by US gallon. Long term mpg is 6.2 (from truck readout). I've found that keeping engine load at 75% or less I can improve an estimated .3 mpg better. Running elog now and governed to 65. With elog I find I'm rushing more now so running less than speed limit doesn't make as much sense to me.
  7. Have a 2014 cxu613 with a mp8 rated 505 hp pulling a 48 ft tandem flat bed. Problem is fuel mileage, at first I thought it was just that I was encountering more wind then normal. Now I believe there is something wrong. I just ran from Florida to Edmonton Ab with only 6000 lbs on the deck and only got 7 mpg and top cruise speed was 65 mph. Last few trips between Calgary and Denver with gross weight between 76 and 79000 lbs I've been down between 5.1 and 5.3 mpg and on the flats I set cruise at 63 mph. I feel this should be at least 1 mpg better. Any ideas. Called my local dealer but he has not called back yet.

Welcome to BMT!

...The world's best antique, classic & modern Mack Truck support forum! Founded in 2000, BigMackTrucks.com is the place to go for everything related to Mack Trucks!


BigMackTrucks.com is owned and operated by Watt's Truck Center, New Alexandria, PA. This forum and it's contents are not affiliated with Mack Trucks, Inc. or Volvo Trucks North America.