I have a no start thread going but am looking for anyone who has experienced this ICP voltage issue.

KOEO numbers for ICP voltage is .07 - I know it should be .24 or so.

With the ICP plugged in, I get a no start as, while cranking, ICP developed reads only as high as 362, IPR maxes out and ICP voltage gets only to .18. I know ICP has to read at least 500 to start, and the IPR shouldn't be maxed and ICP voltage should be in the 1+ volts range.

If I unplug the ICP, voltage of course reads 0, IPR while cranking reads on the order of 75 and ICP number developed by default reads 1667. Still no start and I just know most of the time it would start given these numbers.

I installed a new EOM ICP sensor and got the same readings, I changed the pigtail and get the same readings. I even purchased a 2nd new EOM ICP and get the same readings.

I find no chaffing along the wire loom but will cut open the cover and trace all the way back to make sure.

I haven't been able to figure out which fuse covers the ICP?

Also, FICM is showing correct voltages at 48/11.5/11.5.

Anyone have suggestions as to the ICP voltage - I'd really like to get it figured out so I can see what actual pressure is being developed?

 

IMO you don't have an ICP voltage issue, your low pressure in the high-pressure-oil system is real.

 

just an fyi on ICP voltage/pressure relationship (sensor/computer function)

Ford Values :

Voltage' PSI'
0.2 0
0.4 200
0.73 400
0.96 600
1.2 800
1.4 1000
1.6 1200
1.9 1400
2.1 1600
2.3 1800
2.6 2000
2.8 2200
3 2400
3.3 2600
3.5 2800
3.8 3000
5 4045

 

I don't doubt it Mark. Thanks for the references. I'm still concerned with getting the ICP voltage corrected too. Trying to eliminate it before I tear back into the rails, etc. I've already done the standpipes, dummy plug, STC and injector orings.

That leaves the cups/Orings and HPOP (2006 motor). Most of the research I've done has indicated those 2 rarely fail?

This all started with a hot not start and the only actual indication I found of an issue was a torn oring on the passenger side dummy plug.

 

I don't doubt it Mark. Thanks for the references. I'm still concerned with getting the ICP voltage corrected too. Trying to eliminate it before I tear back into the rails, etc. I've already done the standpipes, dummy plug, STC and injector orings.

That leaves the cups/Orings and HPOP (2006 motor). Most of the research I've done has indicated those 2 rarely fail?

This all started with a hot not start and the only actual indication I found of an issue was a torn oring on the passenger side dummy plug.

 

Tell me again what makes you think the voltage is incorrect?

When unplugged, all it does is set a default value that would allow the engine to start IF it had sufficient pressure to fire, which it appears not to. The voltage/pressure that you have seems to be in the ball park to me.

 

Plugged in it is .07 at KOEO -everything I've seen says it should be .24ish.

 

Did you check the reference voltage at the ICP plug with a meter? Maybe you have a short on the 5v reference voltage circuit. If the volts are below 5v, check other sensors, such as EBP, first by unplugging them incase the sensor is bad. Then check at those plugs for 5v. Then inspect chafe on the harness.

 

Ford's number is 0.2 (and it varies slightly for early vs late model years - I just can't recall the exact differences) ......... and you are at 0.1 (for all practical purposes).

I just don't think that is an issue.

 

I did check reference voltage and it correct. Also looked for chaffing, nothing indicates any issues getting through the tape or cover.

 

If it won't start with the ICP unplugged, it is not an ICP sensor value causing the no-start.

 

Ok, that works for me. Everything else I've seen has I dictated it was too low and indictated a bad sensor.

I'll go back through air testing again tomorrow and see if I can figure it out.

 

Did you airtest it yet? Airtest with the oil filter removed. Do you hear "gurgling" from the oil filter housing? If so suspect HPOP. Mine had failed from injesting a piece of plastic from the top standpipe valve.

 

I have but not with the filter out, will do that tomorrow.

 

Also don't rule out a stuck IPR. If the screen failed then it may be stuck open all the time not allowing it to build pressure.