If you check my signature you can see all my mods to my 97 <ACRONYM title="Power Stroke Diesel">psd</ACRONYM>. Now with you knowing what I have, I got an issue, since I modded my truck over a year ago it gained a higher and rougher idle, it used to idle 680 to 700 rpm or so now its going 610rpm to 720rpm sounding like its gonna stall out. This symptom only exists when the vehicle is warmed up or sitting in the sun all day.
When I drive I dont notice anything except maybe a litlle lag when I punch it, even in the 140hp setting, which wasn't lagging before.
I'm no mechanic but I don't think anything I have modded has broken, the motor has 225,000 miles with no rebuild and I know is low on compression could this be an issue? I'm thinkin it could be the fuel pump, I changed the fuel filter with no fix; and the fuel pump has not been changed since I modded the truck. I got a powerchips programmer to read the trouble codes only and DO NOT use it to tune with, but no major codes are showing, no check engine or other dummy lights on.

Now that is one part, Where I live, (Canada) it gets cold, anything below -20 celsius the truck sputters and jolts will driving at a steady throttle speed but then would act normal again then randomly sputter here and there, but now the sputter has ceased while driving and now I got the first issue.

Any one have any suggestions? Any thoughts on this would be greatly appreciated Thanx for your time!!

 

Could be something going on with the map sensor or the barometric sensor or even your EBPV sticking.

Start unplugging each and see if it makes a difference.

 

Also try unplugging your ICP to see if that helps the idle.

 

Thanx guys I'm gonna go try that now I'll ke you know how it goes!

 

Ok I think I fixed it! Thanks Rocky, I disconnected the ebpv and started it it started better still a little rough;after I reconnected it I rescanned it and got an ebpv code (p0470)and a turbo boost sensor (p0236) I deleted the dtc's and it started like new, I hope it is this easy. Thanx you guys for the help! I never go wrong coming here for help!!!

 

GOOD TO HEAR. NOW IF I CAN JUST GET THESE DANG UJOINTS OUT.
https://www.ford-trucks.com/forums/9...ttle-help.html

 

Take out the 10K mod.
Don't need it with the chip .. just creates issues.

 

Good one Jim, I read the mods and didn't caught that. Blaze42069, what are those 3" manifolds?

 

Glenn, he must have changed the 2" intake plenums to 3" under the spyder. SD trucks have the 3" and we have the 2".

Blaze, did you have to change the turbo to a SD one when you changed them to 3"? Curious.

 

Thanks Darin, I'm also curious about your question.