Timmyb Posted April 20, 2015 Share Posted April 20, 2015 Got a chance to look at my puff limiter today. It was never working since I bought it. The air line from the park brake was blocked off. Unblocked it easy enough, but it seems like it always has air coming from it. From reading earlier post, I know this isn't supposed to work like this. Anyone had this happen? It still starts fine, and it has cleared up a lot of the black smoke. So I'm happy so far. Quote Link to comment Share on other sites More sharing options...
Lmackattack Posted April 20, 2015 Share Posted April 20, 2015 When the parking brake is set it allows full fuel with no boost seen.With the parking brake released it sends regulated air pressure (15-20 psi if I recall) that limits the rack travel until boost overcomes and allows full rack travel.do a throttle snap test with the brake set and released. you should notice more black when the brake is set. Quote Link to comment Share on other sites More sharing options...
Timmyb Posted April 21, 2015 Author Share Posted April 21, 2015 Ok, I checked again. The air line on the front of the reversing valve is always charged with air. Regardless of what position my park brake lever is. Quote Link to comment Share on other sites More sharing options...
Timmyb Posted April 21, 2015 Author Share Posted April 21, 2015 Found a 1/4 inch air line running from the bottom of park brake lever. It is activated when the brakes are released. So I'm guessing this would be the air line I need to run reversing valve off. Only problem is its connected to this valve. Does anyone know what this valve is for? I could just put a T piece in this line, but want to try keep it how mack originally done it. Quote Link to comment Share on other sites More sharing options...
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