O2 ford f 350 7.3 powerwtroke bucks at full throttle where to start? Replaced IDM and injector 8

SOURCE: Fuel Problem

fuel pressure regulator? This diverts excess pressure from the rail back to the tank. When they wear out they usually stay stuck open thus diverting all pressure back to the tank. Pressure tests do not reveal this as pressure is checked before the rail not in it. I do believe you have a bad fuel regulator. They are 75US ouch.

SOURCE: 1997 F-350 Ford Powerstroke4x4 Crew

Have you changed your oil? Rotella 15W-40. These engines really don't like old oil. It becomes too thick for the injection pump to work correctly. Another possibility is a bad cam sensor on the front of the motor. Most engines call this the crank sensor but on this engine you have to look it up as a cam sensor.

SOURCE: 1986 FORD F 350 DIESEL 6.9 REPLACED INJECTOR PUMP

check to see that your mechanical fuel pump is working on the lower right side of the engine. VERY problematic pump due to design and location. Have you replaced your fuel filter with the injector pump swap? cause you need to do that , its a must If your getting fuel to your injector pump you have to bleed the lines to each cylinder to bleed out the air in the system. If that all checks out then you need to set the timing to 8 deg using a timing light and a diesel injection pulse width adapter timing tool. purchase a haynes manuel for 6.9l/7.3l diesel engines to follow the correct procedure for setting timing to manufactures spec. You will have to disconnect sensor at certain times during the timing stage so make sure it is done right!
PS - I hope you marked a reference line on the pump to line up with the line on the housing cause that will get you close to start! good luck

SOURCE: i have a 88 gmc

the idle air control actuator is a common problem in this type of fuel injection an is mounted in the throttle body also the map sensor should be on top of intake make sure is connected right and have full vacum if so just tap on it with engine running and will miss if it is faulty please let me know if this helped or need further assistance i'll be glad to help.

SOURCE: 93 chevy suburban v-8 tbi

Assuming your engine is in good mechanical condition, there are only a few options.

1. You may have a vacuum leak.
2. The pickup in the distributor may be worn to the point that it is sloppy at idle but normal at higher rpm.
3. Idle control valve/motor may not be working properly.

It probably isn't an ignition related problem as the problem would normally get worse as RPM increases. I've seen #2 about 5 times in the past year or 2 so it's not uncommon and would recommend replacing the entire distributor if you come to that conclusion, but would definitely check all vacuum hoses first.