When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Im noticing a extreme lag in acceleration. When taking off from a stop it lags really bad then acts like I floored it. My FMP is 48 somtimes dropping to 47.5. FLP is 13 sometimes dropping to 11.5 during starting. Occaisionally it doesnt want to start, like its not getting fuel. New batteries 3 months ago. Also has blue spring. Its a 2005 thats never had anything done to the FICM, so its kind of old to begin with. I read in another thread that the FICM relay should be replaced occaisionally, so may that could be contributing to some of my probs.
Thanks
Im noticing a extreme lag in acceleration. When taking off from a stop it lags really bad then acts like I floored it. My FMP is 48 somtimes dropping to 47.5. FLP is 13 sometimes dropping to 11.5 during starting. Occaisionally it doesnt want to start, like its not getting fuel. New batteries 3 months ago. Also has blue spring. Its a 2005 thats never had anything done to the FICM, so its kind of old to begin with. I read in another thread that the FICM relay should be replaced occaisionally, so may that could be contributing to some of my probs.
Thanks
My truck is an '04 with an '03 motor. The '05 FICM 70 AMP power relay is a different design then mine and appears to be more robust. I have had both apart. The contacts in mine are small and were burnt and pitted. The '05 contacts have a larger contact surface area. I had 125k miles on my X at the time it happened. If you have similar mileage, I would suggest you replace the relay as a start.
Thanks bullitt390. Im about to stud it, so i guess when i get that deep, i'll find out. The STC was just replaced with the HPOP about 3 years ago and ive only put 10k on it since, so hopefully that isnt it. Guess I will be buying some stuff to check the fuel press.
DSMMH, thanks! Im going to take your advice on that and go ahead and change the relay. Its been there 10 years, prob needs it if nothing else for cheap insurance.
Once i get some fuel pressure numbers, ill report back..
I agree on the fuel pressure and was thinking about how old the filters are.
Don't think it's a FICM problem. However if you want l'll trade you my problem
Sean
Hi Sean! Fuel filters have about 10k on them. I regularly use the motorcraft diesel fuel treatment as well. I suspected ficm mainly because of the age and it's never been touched. I think I was secretly wanting it to be that because it's a easy fix and relatively cheap but I know for a fact my truck doesn't consider my "wants". I'm going to try to get some more numbers off the scan gauge today and maybe it can help point me. Unfortunately getting the lines and parts to check the fuel press isn't convenient today.
I would consider trading probably with you. I still have to do studs and head gaskets along with seals on front axel, break pads, change diff and transmission fluid.
Thanks!
Update... I cleaned the MAF and EBP sensors. And changed the fuel filters. Seams to be running like a champ now. Strange thing though... 8400 miles on my old fuel filters however that 8400 miles was over 14 months. (Havent driven it much) When I pulled the drain plug from the pump on the frame, i discovered that half of it was missing. Needless to say, i replaced it and cleaned out the pump. It had a rusty sludge in it. Surprised it has been able to run at all. Ill be draining that puppy a little more often now.
You should get the updated plug. Were you able to gind the missing part?
One thing to add to the list if you going to do long times of inactivity.
Deasel fuel storage treatment with an algaecide. That will help keep it cleaner.
The only plug I could find near me was the old one. I guess it'll work...that's been on it for 10 yr. The bad news is that it didn't fix the prob.
FMP 48
FLP 13
IPR 38
ICP 700-1000 shortly after starting
STC was changed not long ago with HPOP
Maybe it's dummy plugs like mentioned earlier. If they're failing, will it start cold but not hot? It started strong and I drove it about 5 miles to sonic. Luckily young kids work there and helped me push it out of the way. It sat about 30 min then started.
What do the ICP ,IPR numbers look like? When it does not want to start.
Also are you getting sync for the Crank, cam and FICM? What is the fuel
pules-with number?
What do the ICP ,IPR numbers look like? When it does not want to start.
Also are you getting sync for the Crank, cam and FICM? What is the fuel
pules-with number?
IPR was around 38 after starting. 14.4 before
ICP was above 500 when i cranked it then varied between 700-1000
It did show a 1 to sync.
Im not sure what fuel pules with number is.
I dont have a way to messure fuel pressure.
When i drove it about 5-6 miles the temp was around 170. Then i shut it off in the drive thru. After that it acted like it was going to start but it kind of sounds like the starter speeds up after about 2 seconds of turning the key. After about 30 min of sitting, it cranked and ran real quite like a gas burner, then died. A few min later, it started normal and made it back home.
BTW, dips to 47.5V on FMP are every bit of fine and not indicative of a FICM issue. Everyone online would have you thinking that you need a dead solid 48V when in fact VERY few modules do that.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
