Clowen Posted June 25, 2011 Share Posted June 25, 2011 Our. 08 Mack came up with fuel restriction on computer and shutdown , changed fuel filters and was fine for the day then re appeared is there contamination in fuel tank or something serious like injector cups how can I tell Quote Link to comment https://www.bigmacktrucks.com/topic/19526-fuel-restriction/ Share on other sites More sharing options...
rhasler Posted June 26, 2011 Share Posted June 26, 2011 Our. 08 Mack came up with fuel restriction on computer and shutdown , changed fuel filters and was fine for the day then re appeared is there contamination in fuel tank or something serious like injector cups how can I tellMP7, 8, or 10? Check the hand primer pump and make sure it's locked down. If it's not locked down it can allow air into the fuel system. You would need special tools (fittings, attaching screws, pressure gauge, etc.) to check the fuel pressure. Quote "Mebbe I'm too ugly and stupid to give up!" Link to comment https://www.bigmacktrucks.com/topic/19526-fuel-restriction/#findComment-80396 Share on other sites More sharing options...
Clowen Posted June 26, 2011 Author Share Posted June 26, 2011 The truck is an mp8 I checked the primer it is locked down truck was very hard to get running this morning but once running seems fine and smooth, if injector cups are bad would it not run rough? Maybe a weak fuel pump? I'm at a loss here maybe off to nortrux Quote Link to comment https://www.bigmacktrucks.com/topic/19526-fuel-restriction/#findComment-80410 Share on other sites More sharing options...
rhasler Posted June 26, 2011 Share Posted June 26, 2011 Sounds like it may be injector cups. Quote "Mebbe I'm too ugly and stupid to give up!" Link to comment https://www.bigmacktrucks.com/topic/19526-fuel-restriction/#findComment-80413 Share on other sites More sharing options...
Clowen Posted June 26, 2011 Author Share Posted June 26, 2011 Thanks for the help appreciate it rhasler Quote Link to comment https://www.bigmacktrucks.com/topic/19526-fuel-restriction/#findComment-80421 Share on other sites More sharing options...
fjh Posted June 27, 2011 Share Posted June 27, 2011 Thanks for the help appreciate it rhaslerYup put the rush on that if its still under warrenty! Quote Link to comment https://www.bigmacktrucks.com/topic/19526-fuel-restriction/#findComment-80456 Share on other sites More sharing options...
Clowen Posted June 28, 2011 Author Share Posted June 28, 2011 Yup she's still under warranty,dropped her off & there is three injector cup jobs in front of mine, maybe a problem!!! They want 1500 bucks for the stainless upgrade but atleast you get new injectors as well just wondering what's next? 98000k and can't keep her on the road!!! Thanks for the feedback Quote Link to comment https://www.bigmacktrucks.com/topic/19526-fuel-restriction/#findComment-80490 Share on other sites More sharing options...
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