Another another no start
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Chris, it died like turning off the key. No smoke when turning over. The code reader is newer but a friend used it to read codes on his 2000 7.3. Will see if I can access a live data scanner. Thanks for the reply. Nice to see the eagle globe and anchor.
Post Fiend
Joined: Mar 2007
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From: Texas
That usually means electrical or sensor related.
That means the injectors are not firing when cranking.
An OBDII scanner will pick up generic codes but not engine specific codes. See if you can find out what type of scanner he has. Also try unplugging the ICP sensor and starting. Then scan it again and see if P1280 shows up from trying to start with the ICP unplugged. If it doesn't, you need to find a better scanner. You might also check the tin nut on the back of the IPR and make sure that didn't fall off, or make sure you don't have any chaffed wires on the ICP sensor or the IPR.
Semper Fi
That means the injectors are not firing when cranking.
Semper Fi
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Thanks again for everyone's help. Deifferent scanner and I have codes! p1280,p0603,p1316,p0340. Cleared after writing down, no codes set when tried to start again. Live info:rpm 142,eot 41, tft 29, line <ACRONYM title="Page Ranking">pr</ACRONYM> 5, exh bp 12.1. looking for fuel drain now.
Post Fiend
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From: Texas
Watch RPM, ICP psi, IPR duty % and battery voltage while cranking. You need to see at least 500 psi from the ICP for the truck to start.
You might also try an injector buzz test to see if any more codes pop up or to see if all 8 injectors buzz.
You might also try an injector buzz test to see if any more codes pop up or to see if all 8 injectors buzz.
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Chris, thanks for sticking with me on this. The scanner I have now only reads the 5 parameters. Will check for another tomorrow. Both batteries are new and I keep putting the charger on. Rpm seems to stay about 150. Did disconnect icp sensor and tried starting, no help. Will the pcm set faults if the engine is only turning over, not running? If so, shouldn't I see some fault on this scanner? Regards, Fred
Post Fiend
Joined: Mar 2007
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From: Texas
It won't always set faults. It depends on what the issue is. You might try cranking for 20 seconds straight to see if it will trip any codes. Sometimes a normal crank isn't long enough to trip a code. Just be sure to let the starter cool down for a minute between starting attempts. Also keep the batteries on a charger. If voltage drops too low while cranking, the IDM won't fire the injectors.
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Post Fiend
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From: Payson, AZ
If you find a scanner that can watch the appropriate data this should help.
7.3L Powerstroke Starting Requirements:
Battery voltage a minimum of 10.5 volts while cranking
RPM at least 100 while cranking. (If no tach movement suspect CPS)
If you have a scan tool ICP should be 500 PSI ± 25 PSI
Fuel pulse width should be 1 to 6 milliseconds.
NOTE: The above requirements assume the following:
Correct oil level, oil type and pressure
Correct type of fuel
Correct fuel pressure (53 PSI per Ford spec)
Sufficient air supply (clean air filter & unobstructed intake)
Proper oil level in HPOP reservoir (1 to ¾ inch from top)
Proper glow plug relay and glow plug operation (in cold weather)
Proper injection timing (PCM controlled)
7.3L Powerstroke Starting Requirements:
Battery voltage a minimum of 10.5 volts while cranking
RPM at least 100 while cranking. (If no tach movement suspect CPS)
If you have a scan tool ICP should be 500 PSI ± 25 PSI
Fuel pulse width should be 1 to 6 milliseconds.
NOTE: The above requirements assume the following:
Correct oil level, oil type and pressure
Correct type of fuel
Correct fuel pressure (53 PSI per Ford spec)
Sufficient air supply (clean air filter & unobstructed intake)
Proper oil level in HPOP reservoir (1 to ¾ inch from top)
Proper glow plug relay and glow plug operation (in cold weather)
Proper injection timing (PCM controlled)
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Ok, icp pressure is 2100, ipr duty cycle 41, rpm 145, fuel pulse width 5. Buzz test showed tach movement like it should, but didn't hear the buzz. Then showed faults p1293 and p1294. Could both of the valve cover harnesses failed at once?
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Ok, pin E on the valve cover connector reads 2.25 vdc with the key on. Wiring diagram says its high voltage. Is this voltage right? If not, I think the IDM is bad. And that looks like a pain to replace.