tuffenuf Posted October 27, 2011 Share Posted October 27, 2011 Just got 2 know, why this Mack does not have the power it should ? '05 Granite w/ Mack 10 speed, 44K on camelback @ 4:42 ratio and 24.5 rubber. No boost gauge on truck seems I drive around with fuel pedal mashed towards floor, and doesn't seem able to get up and go ? Hate the need to constantly stay near redline. Pyro never above 800, no boost leaks, clean filters, maybe grossed out @ 73K is too much for the pup. Thanks. Quote Link to comment https://www.bigmacktrucks.com/topic/21288-ami-370/ Share on other sites More sharing options...
TOMD Posted October 27, 2011 Share Posted October 27, 2011 Mack has real problem with emmisions restrictions choked engine. I have a turbo and injector combo that wakes engine up. Quote Tom ~ Parts & Service SpecialistWatt's Mack Sales, Inc. 1-888-304-6225 Link to comment https://www.bigmacktrucks.com/topic/21288-ami-370/#findComment-89547 Share on other sites More sharing options...
tuffenuf Posted October 29, 2011 Author Share Posted October 29, 2011 I should call and ask about solutions, Thank You. Quote Link to comment https://www.bigmacktrucks.com/topic/21288-ami-370/#findComment-89656 Share on other sites More sharing options...
Mackpro Posted October 30, 2011 Share Posted October 30, 2011 Just got 2 know, why this Mack does not have the power it should ? '05 Granite w/ Mack 10 speed, 44K on camelback @ 4:42 ratio and 24.5 rubber. No boost gauge on truck seems I drive around with fuel pedal mashed towards floor, and doesn't seem able to get up and go ? Hate the need to constantly stay near redline. Pyro never above 800, no boost leaks, clean filters, maybe grossed out @ 73K is too much for the pup. Thanks.4.64 gears or low profile 24.5 tires might help get the RPM/torque curve back on track but I have seen many CV's with this spec and be OK. I would take it to the dealer and have them install the latest Datafiles and software in both ECM's ( step 12B software) and calibrate the throttle pedal, this in some cases can make a big difference. These engine usually do a good job as they have the same torque output rateing as the AI427. EPA made Mack drop the AMI370 only after a couple of years due to being way to dirty. A manual boost pressure guage plumbed into the intake manifold is the best way to tell if the engine is getting full boost ( around 30 psi but I dont have my book close by) Quote Link to comment https://www.bigmacktrucks.com/topic/21288-ami-370/#findComment-89700 Share on other sites More sharing options...
tuffenuf Posted November 2, 2011 Author Share Posted November 2, 2011 Thanks for the info , I did talk to service manager and got to get there for appointment. Boost gauge will be installed to monitor things. Quote Link to comment https://www.bigmacktrucks.com/topic/21288-ami-370/#findComment-89807 Share on other sites More sharing options...
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