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1997 mack e427hp



Hello, this is my first post I hope I'm putting this in the right area. 


I have a 1997 mack ch613 e427 with a 18 speed and 3.86 gears

Vin 070097

I have had this truck for almost 3 years and it gets the job done but just has lack of power I'm used to I have to shift alot  

We have just did a head job,head gasket, water pump,oil cooler ,all new fuel lines, new exhaust. I was hoping it would of helped but it did not. 


Any help would be appreciated 


Thanks wayne 


Edited by 97mack427
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WELCOME TO THE  ELECTRONIC E7..  they just lack power and are sleepy. you will need injector upgrades and possibly a ECM tune to get them to wake up and run like they should. I have only driven one E7 that performed well in stock form and I dont know why it was better than the other 10 I have driven

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