99 f350 7.3 High RPM Miss
Need help with this issure.
I have a miss at high rpms I pulled this engine, manual trans, and 4x4 axle and put them in my F350 Majestic motorhome. 156,000 miles on the engine. Slightly dusted engine with good compression 375-400 (cranking and corrected for altitude). Has a little bit of a long start. No smoke on start up unless 10 degrees or colder No smoke when pulling either. Glowplugs ...Good GPR... Good Checked resistance from IDM to injectors ...Good History of some ether for starting before I got my hands on it. I have AE with the ford enhancement. But I am new to working on a powerstroke and new to AE. ICP ...new CPS...new Oil ....new EBP...new Installed a pressure gauge to the drivers side upper port on my fuel bowl: 60 psi at idle 55 psi at WOT 2500-3000 rpms under a load HPOP stabilized pressure is 2750 @ 40% duty cycle Truck still misses (semi-intermittently) at higher rpm with a load. Rechecked codes KOEO: None present I visually inspected valve movement while running (idle). Did the buzz test when cold.... All injectors sounded the same when tested individually. Did a cct when not completely warm: P0266 p0272 Repeated the test at normal operating temperature: P0266 Torque values on rocker arms bolts and injector holds are good. Fuel quality isnt an issure since this problem has remained for 5 tanks of fuel. Any ideas of what I should do next? |
Checked poppet clearances: all inbetween .002 and .003
Checked coil resistances : all between 2.8-3.0 ohms Checked all pushrods : all straight Checked all poppet screws : all tight |
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