SLEDOG Posted March 30, 2023 Share Posted March 30, 2023 I realize this is not a Mack but you guys are good so here I go…. Crank/no-start . Obviously some electrical issues at fuse panel on driver side. power box with fuses under hood test ok I believe I have fuel pump issue as well but want to check all electrical first. I have no fuse or electrical diagrams. can anyone help? thanks Quote Link to comment https://www.bigmacktrucks.com/topic/72663-1999-navistar-grummanolson-van-no-start/ Share on other sites More sharing options...
SLEDOG Posted March 31, 2023 Author Share Posted March 31, 2023 It’s the T444 motor which evolved into the 7.3Powerstroke as near as I can tell… Quote Link to comment https://www.bigmacktrucks.com/topic/72663-1999-navistar-grummanolson-van-no-start/#findComment-528210 Share on other sites More sharing options...
tjc transport Posted March 31, 2023 Share Posted March 31, 2023 If the fuel bowl heater shorts out, it blows the power supply fuse for the pcm. On ford pickup easy way to check is if the cigarette lighter don't have power cause that is on the same fuse too. Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/72663-1999-navistar-grummanolson-van-no-start/#findComment-528214 Share on other sites More sharing options...
BOBWhite Posted March 31, 2023 Share Posted March 31, 2023 T444 is what is was called in International products and 7.3 Powerstroke is what it was called in Ford products, Same engine as far as I know. International is known for crapy wiring so that's something that should be taken care of first before the HEUI fuel system. I'm not an expert HEUI systems but Adapt Ape on YouTube has some guides on troubleshooting them. Good luck Quote Link to comment https://www.bigmacktrucks.com/topic/72663-1999-navistar-grummanolson-van-no-start/#findComment-528215 Share on other sites More sharing options...
SLEDOG Posted March 31, 2023 Author Share Posted March 31, 2023 I watched that BobWhite…I don’t have the scan tool…I see where there’s a big round plug on the dash for it. thanks Quote Link to comment https://www.bigmacktrucks.com/topic/72663-1999-navistar-grummanolson-van-no-start/#findComment-528220 Share on other sites More sharing options...
fjh Posted March 31, 2023 Share Posted March 31, 2023 If it cranks and won't fire ! There's some parts canon ammo that isn't to expensive! replace the crank sensor! this on these have been known to fail ! won't throw any codes! Experience Based comment! Just sayin! 2 Quote Link to comment https://www.bigmacktrucks.com/topic/72663-1999-navistar-grummanolson-van-no-start/#findComment-528240 Share on other sites More sharing options...
SLEDOG Posted March 31, 2023 Author Share Posted March 31, 2023 Thanks…. I have now realized that there IS a self-diagnostic test I can perform on this. I will be checking this afternoon to see if any faults are stored. I have noted that a bad crank sensor won’t throw a fault… Sledog Quote Link to comment https://www.bigmacktrucks.com/topic/72663-1999-navistar-grummanolson-van-no-start/#findComment-528241 Share on other sites More sharing options...
tjc transport Posted March 31, 2023 Share Posted March 31, 2023 If I remember correctly, a bad cps will not show tach when cranking. 1 Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/72663-1999-navistar-grummanolson-van-no-start/#findComment-528244 Share on other sites More sharing options...
fjh Posted April 1, 2023 Share Posted April 1, 2023 9 hours ago, tjc transport said: If I remember correctly, a bad cps will not show tach when cranking. Some models newer 2000 new don’t do the tack thing not varied me me though! rumor Quote Link to comment https://www.bigmacktrucks.com/topic/72663-1999-navistar-grummanolson-van-no-start/#findComment-528285 Share on other sites More sharing options...
Mean Green Posted April 2, 2023 Share Posted April 2, 2023 Injection control pressure regulator magnet can fall off only a stamped tin nut holding it on its down in the valley in the high pressure oil pump Quote If your going to be a bear be a grizzly Link to comment https://www.bigmacktrucks.com/topic/72663-1999-navistar-grummanolson-van-no-start/#findComment-528433 Share on other sites More sharing options...
SLEDOG Posted April 2, 2023 Author Share Posted April 2, 2023 Got it running today…. Bad connections at a few key fuses at fuse block in cab. Starts well but no throttle control . will be checking that next.. sledog 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72663-1999-navistar-grummanolson-van-no-start/#findComment-528441 Share on other sites More sharing options...
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