I Have A Early 99 F-350 That Is Hard To Start And Down On Power And Has Horrible Fuel Mileage About 11 Mpg. I Bought This Truck In August It Started And Ran Fine No Smoke At All I Had A Diesel Mechanic Put It On A Computer Everything Was Right Except That #5 Cyl Was Non Contributing My Mechanic Told Me It Was Probably A Injector Well About A Month After Buying It. I Had To Plug It In Everytime I Shut It Down For More Than 6-8 Hrs Even If It Was 80 Degrees Well Since Then I Have Replaced Both Uvc Harnesses, 3 Injectors, Turbo, Every Time I Put It On The Computer It Pops Up With Different Codes The Problem I Have Is When I Start It It Wants To Romp Until You Depress The Accelerator Then Its Fine But It Still Wont Move Out Of Its Tracks Until Almost Completely Warm I Cant Figure It Out It Keeps Popping Up Different Codes Never The Same One Twice For Example I Went To Advanced Auto Parts The Other Day And They Put It On Their Computer It Showed 3 Codes P1670 Electronic Feedback Signal Not Detected ,p1316 Inj Driver Module Codes Detected ,p1247 Turbo/super Boost Pressure Low I Had Them To Clear The Codes Then Put 200 Mi On It And Went Back Same Computer Same Operator But Different Code This Time P0603 Pcm Keep Alive Memory Kam Memory Any Help Would Be Appreciated I Owe Too Much To Sell Or Trade ALSO IT DOES NOT HAVE A CHIP OR PROGRAMMER I HAVE ONE TO PUT IN BUT AM AFRAID TO UNTIL I FIX THIS PROBLEM

 

With the 1316 code you need to do a KOEO test before you clear it to retrieve the IDM codes

 

Can You Provide A Link Or Give Instructions WHAT IS KOEO THANKS SORRY NEW TO THE DIESELS

 

KOEO - Key On Engine Off - a diagnostic that is run while the engine is off.

You need a more comprehensive diagnostic utility such as Autoenginuity to perform things like KOEO diagnostics and injector buzz tests, which will retrieve the IDM codes.

If you don't have the tools or equipment, it's best to find a shop that can do it. From your original post, it sounds like your diesel mechanic doesn't have any idea what the problem is. He is swapping parts out in an attempt to fix the problem, which only adds up on your bill. Take it somewhere else.

 

Your problem sounds similar to what I am just now staring to experience, ie code 603, hard to start, surging or rompimg when first starting, no throttle response until it warms up. I'll be watching for a fix also!