ongradeex Posted November 27, 2013 Share Posted November 27, 2013 I have a mack 300 engine that is not getting full rpm,I replaced charge air cooler after finding crack along one side.Checked linkage at injector pump (getting full range.Checked turbo no oil leaks and spins free.Can anyone tell me what the fuel pressure should be at idle and full rpm?It is getting up to 1750 rpm now-no load Quote Link to comment https://www.bigmacktrucks.com/topic/33662-mack-300-not-getting-full-rpm/ Share on other sites More sharing options...
Lmackattack Posted November 27, 2013 Share Posted November 27, 2013 Are you sure it's a 2100 rpm engine?.....Mack made a 300L " L" as in low rpm. I think they were governed to max 1700 rpm. Quote Link to comment https://www.bigmacktrucks.com/topic/33662-mack-300-not-getting-full-rpm/#findComment-218744 Share on other sites More sharing options...
ongradeex Posted November 27, 2013 Author Share Posted November 27, 2013 No, it was in an accident about six months ago, that's where the crack came from in the air cooler and it has not been the same since.the turbo picks it up pretty nice but you can still tell something isn't right. Quote Link to comment https://www.bigmacktrucks.com/topic/33662-mack-300-not-getting-full-rpm/#findComment-218747 Share on other sites More sharing options...
Lmackattack Posted November 27, 2013 Share Posted November 27, 2013 Gotcha.....don't know fuel specs and don't have my books handy.. Quote Link to comment https://www.bigmacktrucks.com/topic/33662-mack-300-not-getting-full-rpm/#findComment-218751 Share on other sites More sharing options...
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