kino_fab
KTPA Tech Official
- Joined
- Aug 19, 2007
- Messages
- 2,244
Got a mess of problems out of my dads 03 F350. Truck has 105K miles now, and an old custom burt diablo plug in chip (plugs into ecm like a TS flip switch) that only kicks in between 1200 and 1800rpm. It has a bad miss when you first crank it up and it doesn't matter if you let it sit for 5 minutes or 3hrs warming up it will still miss going down the road when you first take off. To get it to quit missing you have to wind it out fast and hard in 2nd or 3rd gear (6spd). It clears out and runs great after you hit full boost and high RPM for the first time. This has been going on for about a month or 2 now.
For the past 2 years we had a CEL come on when you had a load hook to it. The trouble code was for the Injection pressure too high or too low. Just the other day we changed the Injection Pressure Regulator to see if that might be the reason for the miss, but its still there.
Another problem we have had for the past 2 years is if you let the truck sit long enough with the high idle and the warm up valve kicked in, the warm up valve sticks and will not close for a few miles down the road, truck has no power till the valve closes. Now with dead miss problem and the valve sticking, the truck will miss and cut out the whole entire time and will not have any power no matter how long you drive it. I few of my friends say I need to clean the valve to keep it from sticking, but I have no Idea how to go about cleaning it or where to start to get to it. Any help would be apreciated there.
Fixing that will keep it from missing after you hit full boost, but I'm still puzzled why it misses like crazy untill it hits full boost. Even with the valve stuck open and you wind out the engine to redline, it will still miss unless the valve is closed and the turbo makes full boost. We had a scan tool ran on the truck and it said the number 8 injector was giving us fits, so we know we are gonna have to replace it some time (odd ball AE code injector too), or maybe something else is causing the injector to miss fire. Could this be a map sensor problem? or is it something totally different?
Thanks for any and all help with this.
For the past 2 years we had a CEL come on when you had a load hook to it. The trouble code was for the Injection pressure too high or too low. Just the other day we changed the Injection Pressure Regulator to see if that might be the reason for the miss, but its still there.
Another problem we have had for the past 2 years is if you let the truck sit long enough with the high idle and the warm up valve kicked in, the warm up valve sticks and will not close for a few miles down the road, truck has no power till the valve closes. Now with dead miss problem and the valve sticking, the truck will miss and cut out the whole entire time and will not have any power no matter how long you drive it. I few of my friends say I need to clean the valve to keep it from sticking, but I have no Idea how to go about cleaning it or where to start to get to it. Any help would be apreciated there.
Fixing that will keep it from missing after you hit full boost, but I'm still puzzled why it misses like crazy untill it hits full boost. Even with the valve stuck open and you wind out the engine to redline, it will still miss unless the valve is closed and the turbo makes full boost. We had a scan tool ran on the truck and it said the number 8 injector was giving us fits, so we know we are gonna have to replace it some time (odd ball AE code injector too), or maybe something else is causing the injector to miss fire. Could this be a map sensor problem? or is it something totally different?
Thanks for any and all help with this.