This only happens on the first start of the day. The rest of the day the truck starts and runs fine. After it cranks and catches, it will surge once or twice. The other day it did it three times. Most days it only surges once or twice and it's usually very minor and sometimes hardly noticeable. Right after it surges, it smooths out and runs perfectly for the rest of the day.

Yesterday I unplugged the ICP and this is what happened when I started it:


This is the same surging that I get on cold starts, but it never does it for this long. I plugged the ICP back in and it started and drove perfectly the rest of the day. The ICP sensor was replaced a few months ago.

Any idea what might be going on?

 

Nice Video!


Unfortunately, I can't offer whole lot here. I checked the Temp in Sacramento, CA and it was 79* so I wouldn't think it would be oil related unless you not using a quality 15/40.


I did do some digging around on other sites and found people with the same issue. Although there issues are temperature related.


A dealership replaced a Neutral Safety Switch which cured one guys issue. I'm still tying to wrap my head around that one.


Another changed the IDM which resolved it.


Another had a sticking EBPV.


So here are some suggestions:


Oil - Are you using a quality 15/40?
Has it been changed regularly?


Could you abscond a Scan Tool to monitor some parameters?


1. Select the parameters indicated from the Scan Tool parameter list and monitor while cranking engine.




Data List Monitoring Parameter:
V-PWR 10.5 VDC Minimum.
RPM 100 RPM Minimum (0 - CMP Suspect)
ICP 500 PSI or 3.4 MPAM Minimum
ICPv (KOEO) Spec 0.20v - 0.30v
FUEL PW: 1 MS - 6 MS ( <1 / >6 IDM Suspect)
V-PWR - If indicating a low voltage condition, check battery voltage, charging system or power and ground circuits to the PCM.



DC% - Cranking NTE 20% / 65% is Closed. (IPR Suspect)


2. RPM - Low RPM could be an indication of starting/ charging system problems


3. No RPM indicated with the engine cranking - could be CMP circuit fault, check for DTC’s.


4. ICP - A minimum of 500 PSI (3.4 mPa) is required before the injectors are enabled. No or low oil in the reservoir, system leakage, injector O-Rings, or faulty IPR could cause pressure loss.


Note: If no RPM signal is received, IPR duty cycle will default to 14%


5. FUEL PW - Even though a 1 to 6 mS FUEL PW is shown, it’s possible the IDM did not receive the signal due to a CI or FDCS circuit fault or internal IDM failure.
echo=off


If nothing else, it moves you to the top again so someone with more familiarity with this may see it and comment.

 

Try starting in neutral. Mine does the same thing if started in Park but starts fine in Neutral. I'm told that a bad Trans Range Sensor will cause this.

 

How many miles on the injectors ?

 

Mine would romp every so often as warm as the mid-upper 60's. There seems to be multiple causes, but once I switched to 5w40, it never occurred again.

https://www.ford-trucks.com/forums/1...hen-romps.html
https://www.ford-trucks.com/forums/1...-on-start.html
https://www.ford-trucks.com/forums/6...-romp-fix.html

 

I bought the truck in November of last year with 144k on the clock. It's got about 152k on it now. I didn't get any maintenance records, which is another thing the dealership lied to me about. The truck was absolutely bone stock when I got it and aside from a brake controller and a K&N filter (which I threw out), there isn't any evidence of any other mods.

I've used Rotella 15w40 in it. I have no idea what was put in it before I bought it. As far as I know, the injectors are all original.

I don't know where I could "abscond" a scan tool from. I'm living in my RV full time now and often don't know anyone at all in whatever city I happen to be in.

Since I posted last, here are some more observations/problems I've run into. Whatever is going on seems to be getting worse.

Yesterday morning, I started it up fine and didn't have any problems. I was getting ready to hook the RV up and hit the road and I was jockeying the truck back and forth trying to get the truck in the right spot. When I hit the brakes to put it in reverse, it stalled on me for the first time since I got it. I started it back up no problem and it ran the rest of the day without stalling.

Then, about 3 hours outside of Las Vegas, the OD light started blinking and blinked until I got where I was going for the day, about 2 more hours.

This morning, I started it up as normal and it surged just like it did in the video above, but this time with the ICP plugged in. I shut it off and tried starting it in neutral and it didn't surge at all. But I don't know if it was because it was the second time I started it, or because it was in neutral.

Today while making my way to Wendover, NV I noticed that the OD light isn't blinking, but the "Service engine soon" light came on.

Obviously I need to pull codes. The transmission shifts fine and the truck runs normal but something is broken. How do I pull the codes? Can I just grab any OBD-II scanner and read them? I have an OBD-II scanner but I've never used it on this truck before.