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OldRedMack

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Everything posted by OldRedMack

  1. So. after a run on the dyno, which confirmed the weak bottom end and full power on top end, and 24hrs of downtime sitting at mack because of a corrupt file on the download. I ended up with a program they called "the smoke file" . They said it was made for the bottom end pull, and the truck has more power. But now I feel a lag in the pedal and don't know if I should get a new throttle positioning sensor or just go ahead and get the injectors. Mack tech, did the 5" exhaust come in yet? Did they give you part numbers?
  2. Ok, y'all are awesome. I've learned more from this place than I have the last 3years of talking to every mechanic I can find to try and figure this truck out. If I decide to do injectors also, should I put 427 injectors in with the 370 program? Or request the HP upgrade to the 427?
  3. OldRedMack

    Driver

    From my experiences, low oil pressure or low coolant levels.
  4. 1M2AL02C77M003933. No I have not done injectors yet. I know you recommend k&s, I might give them a call this week.
  5. I had an s467 built for it, then read that posting a couple days ago and swapped the manifold. And it helped a good bit, but you can still tell when it opens up. I thought I read somewhere that the torque curve was programmable on that engine, but when I call the local Mack dealer here in Atlanta they sound like idiots and acted like they have never even heard of the updates for that engine. So I have no idea if it has had the 12b update or not.
  6. As the title says I have an AMI 370 and it's a dog until 1500rpm, then all the fuel and air come in at once and it takes off like a rocket. Any ideas on whats going on? The truck has plenty of power, just all after 1500rpm.
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