2000 f-350 177*** miles will not start unless you soak a rag in gas and put it in the air intake it starts and runs fine I hooked up the scanner and watched the icp pressure when cracking and it only reached 175 psi and it needs to be 450 psi I removed the icp sensor to see if the o-ring was split but it wasn't and the oil galley was not full of oil could this mean the hpop or the lpop needs to be changed any info would be great

 

Sounds like the IPR (injection pressure regulator). This is some info on starting I saved:


This is a good "No Start" trouble shooting guide.
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Originally posted by Dave (Golfer) on PSN 01-20-2010 Thanks Dave

its nevvvvver the oil pump...seriously.

I see sooooooooooooooo many guys (dealerships included) that see "no ICP" or some ICP codes in a scantool...and toss HPOP's on truck after truck...when it is either an IPR or an injector (poppet valve) issue.

If you hook up the scantool, and monitor ICP (psi) while cranking...you'll see IPR% (duty cycle) climb & climb 15% key on..20, 30, 40, 55%, higher..the increase in IPR% means that the PCM is requesting ICP pressure to increase...

so ALSO watch ICP(psi) and if it comes up to only 180-250psi or so and stays there...then it's the IPR hung open (bypassing oil back to the oil pan through the front cover) such that only minimal psi can be made.

If the ICP is VERY low...like under 60psi...then it could be injector (poppets) pissing oil (under the VC's)..which is typical for injector with more than 180-200k miles.

if ICP climbs above 550-600..then it will probably climb much higher (15-1800+) and it is most likely going to be an electrical issue.

If his scantool will not connect then its a PCM or chip issue (remove the chip if you have one & haven't removed it yet)

if the scantool connects AND you have >600ICP then look at the datastream for a RPM reading.

if the scantool picks up an RPM signal and it seems accurate....then the CPS is good.

If no RPM on the scantool, replace CPS.

If you have RPM (on scantool, not just on dash)...AND have ICP >600, then run an (key on, eng off) injector "buzz test"...

the buzz test is nothing more than a continuity test from the PCM, through the IDM, and to & from each injector solenoid.

LISTEN to each inj buzz....do they all sound the same? nice & crisp?

if the test passes (and you audibly heard them all)...then wiring is good, IDM is good, HPOP is good...CPS is good...then it could be a fuel issue. gasoline, water, etc...

I wouldn't mention it if I haven't seen it myself numerous times...

any chance this no start began with 10-20miles after a fillup?

holler if you need help troubleshooting. take care~ Dave
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Hears some good info also:

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 and fuel
pulse width should be 1 to 6 milliseconds.

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)

 

Thanks for the great info. Where is the IPR located?

 

It's on the right side of the fuel bowl in this pic: Ford Truck Enthusiasts Forums - tdpower's Album: Useful pics - Picture

 

Here is some more info on the ipr: New Page 0

 

It's so simple, yet so often overlooked... make sure that your not low on engine oil in the sump. On startup, the oil is thicker, flows more slowly, and can prevent adequate pressure buildup if the level is too low. Once the engine is running and the oil thins out, it can flow more easily and allow the lpop to keep the hpop supplied enough to make you think it isn't oil level at all.

I just went through this exact scenario because of an unattended leak which allowed my sump to get 2-gallons low. The engine would crank, idle ok, but when I went to take off from the driveway before the engine was completely at temperature, the truck would stall. However, once the oil was warmed up, the truck would start and run just fine. I added the two gals of oil and she runs like a top again ... thank goodness for the oil pressure switch!!

 

Thanks for all the great info I will let you know what I find.

 

Ok put new IPR valve in truck still want start when cranking there is only 180 psi at the ICP which indicates the IPR is stuck open but when you use a starting aid the truck starts and runs fine any help would be great

 

Will the truck run of the popped valves are pissing oil out ?

 

I have a 99 7.3l broke down years ago due to a bad idm. Since then I've replaced the icp, ipr, uvhc, uvhc pigtail, idm. Now that all that has been done it has sat even longer due to high icp like around 1800 like you mentioned in this post. Also it's weird you mentioned this happening soon after a fill up bc that is what happened to me about 5 years now without my truck. Needless to say I need it to run again. Any thoughts?

 

This is a pretty old thread and I only recognize 1 member as still active here. Your best bet would be to start a new thread of your own giving as many details as you can on what the issue is and what you've done so far in diagnostics.

 

This is a pretty old thread and I only recognize 1 member as still active here. Your best bet would be to start a new thread of your own giving as many details as you can on what the issue is and what you've done so far in diagnostics.

 

No icp pressure, but commanded icp %. Got RPM signal. What' ya think?