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cranks but no start
2003 7.3 excursion. died in driveway. Will crank but not start. Fuel pump is not coming on and I hot wired it and still no start. No WTS light, CEL/SES light on (even after removing PCM). Could not talk to PCM with scanner. New CPS in it and no change. Fuel bowl has been removed with reg return so no fuel bowl heater fuse issue. All fuses checked with test light. All relays checked. No rpms when cranking. I have heard of a low battery causing this. Am I understanding this correctly, that the batteries could put out enough juice to crank the engine but not enough for the PCM to function? I ask this because it died while it was running. I have been having intermitent problems with my alternator. It will be 14v then 12v then 11.5v and then come back up. I suppose my batteries could be down but did not even think that if it could turn over that it was not putting out enough juice for the pcm to work.
My PCM and IDM were delivered today to a shop in Florida for testing. I talked to the tech this morning and he said he would be checking it today. He has an IDI and DI 7.3 on a bench that he tests IDMs and PCMs on. I thought that was pretty cool.
You guys got any ideas why the CEL/SES light would be on even after PCM removal?
ANy help appreciated.
Last edited by ajohansson; 07-01-2009 at 09:43 AM.