Popular Post clemson_tiger29678 Posted November 17, 2014 Popular Post Share Posted November 17, 2014 So, I've wanted a B61 for quite some time and never could pull the trigger on a big rig, until yesterday! Bought a 1961 that is in super shape, no rust, needs paint...engine and trans has been changed to a 70's Detroit 6-71 and a 13 speed (NO TWIN STICK!!!!). Anyway, had a 2 hour trip to take the truck on to get it home, and had some issues. First 30min, ran great...interstate speed was 50'ish as we were getting use to it...then it started to lose power/pull. Pulled over, it was running and idling fine, looked it over, jumped back in, got back up to speed and then start losing power again. After several times of this, I pulled over, but it off, looked it over, cranked it back up and took off...ran great for 5 miles, then same issue. I learned that cutting it off for 30-45sec would get me 3-5 miles of strong running before I had to pull over and cut it off again. When I say, lost power, I mean, 10mph max up a hill...no power. To preface all of this...the truck had been in the previous owners possession for 15 years. It ran great, shifts good, brakes good...but hasn't had much maintence over 15 years. My first thought is trash in the fuel filter on the Detroit Diesel...and to put a new filter and new air filter on it. I'm open to any other suggestions. Thanks guys. Looking fwd to being apart of the Mack community. 4 Quote Link to comment Share on other sites More sharing options...
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