Update in case any interested:

Temps cold right now and hit 28 degrees. Started her up for a trip with wife. As i was walking back in house, it idled up to around 1000 to 1100 just like it's supposed to do. Sounded good and also warmed interior up quicker. Thanks guys. All is good.

 

Thanks for checking back in. Glad she is doing what she is supposed to.

 

Should take about a minute with no input to the throttle or brake for the high idle to spool up. Glad all is as it should. Without high idle you will be waiting for a long time for heat.

 

In case anyone is interested.....here are the specifics published by Ford when they rolled out the 99.5 DIT updates.

The CAC crossover has a PCM controlled intake air heater. In order for the PCM to activate the heater, the following conditions must be met:

• Fast Idle must be engaged
• glow plugs off
• PCM voltage between 11.8-15 volts
• EOT below 131 F
• Engine speed above 1000 RPM

It then goes on to describe fast idle requirements....

• Vehicle in Park (or parking brake set if manual trans)
• EOT below 158 F
• IAT below 32 F for 1000 RPM or 14 F for 1100 RPM
• Brake pedal must not be depressed
• Accelerator pedal must not be depressed

 

Thank you very much for posting that. NOW we have all the right numbers and conditions.

 

Then on page 4 it goes on to talk about the EBP valve. The conditions are:

• IAT below 50 F
• EOT below 158 F

So it does appear that fast idle and EBP operation are independent functions that may or may not occur during warm up processes.

Note: The EBP valve can close for warm up even while driving. Vehicle does not have to be parked for the valve to close.

 

After reading through this quick thread, I was curious to know if a clogged EBPV could effect high idle? I do notice when my 02 7.3 Ex kicks into high idle it does fluctuate a little bit sometimes.
After scanning for codes I have seen EBPV, as well as a EPBV circuit code the other day along with a check engine light, in this case I did accelerate kinda hard out of the driveway on a "semi-warm" truck... have not had time to clean the EPV/tube yet.

 

At least for 99.5 and up models.....e99 may be different.

 

I was unaware the EBPV would close after putting the truck in gear and driving. My truck was not driven during cold weather last year so i had not experienced that till this year on a cold morning. Started it up and after a min or so the idle increased and valve closed like it done before.

I had the heater still hooked up to help warm the water while circulating the water. I let run for another 5 mins and then unpluged the heater and upon stepping on brake it idled back to normal speed..

I put in gear and backed down driveway, put in forward and started driving out the neighbor, which is slow speed, and happened to hear something that sorta startled me at first..

I quickly figured out the EBPV was closing a bit so i tried not to accelerate hard for a bit.. it went away in a couple miles.

learned something more about this beast ..

 

Thanks guys. This site is great!