cfd511 Posted February 23 Share Posted February 23 2016 mack mp 8 deleted dump truck . Was running great then one day i was merging onto highway and had to hit the gas and the truck fell flat on its face and died . Insas able to restart but now it dies at random times and is hard To start. We replaced the cups and two bad injectors but still didnt fix it . We dont see any visible leaks . any ideas on how to find a leak that doesn't want to be found . also diD fuel pump when cranking after it stalls . The engine only cranks few times then stops and keeps repeating . Someone said this was a safety because of low rail pressure . thanks for any feedback Quote Link to comment https://www.bigmacktrucks.com/topic/76424-mack-fuel-issue/ Share on other sites More sharing options...
Mackpro Posted 3 hours ago Share Posted 3 hours ago If it cranks for exactly 3 seconds and then quits cranking like you let the key up. Thats a sign of crank shaft and camshaft sensors mismatch readings. Surprisingly it won’t set a fault code for this. Quote Link to comment https://www.bigmacktrucks.com/topic/76424-mack-fuel-issue/#findComment-592379 Share on other sites More sharing options...
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