About to give up on this w250!

Ive been working on this truck for over a year and I am about to just take it to a junk yard!
Problem: It lobes when it is cold and you have to keep on the gas to keep it running, but when it is warm, it runs and idles just fine. This all started after I did an oil change and I put rotella 10w-30 in it, Yes I know that is diesel oil. But ive heard of guys using the 10w-30 in gas engines. And yes Ive done multiple oil changes (with new filters) after, always when the motor is hot so the oil is thinner.

Parts Changed:
Fuel injectors Twice. (TBI)
Intake manifold and gaskets.
Spark plugs and wires.
Cap, Rotor and coil.
Idle Air control Actuator
Coolant Temp Sensor
Radiator
Air filter and housing
Compression Tested, all cylinders at 140 or above.
Vacuum test at 19 inch of mercury.
Coolant changed and no air in the system.
Fuel Filter was changed Earlier this year.

Ive adjusted the idle the way the chiltons manual and the way some guys on here have told me too and that hasnt helped either. I can't think of anything else. At the risk of sounding rude DO NOT RESPOND, IF YOU HAVEN'T READ THE ENTIRE POST.

Please help!!

There is a small computer board on the firewall called an ICM. They go bad frequently. So do the Ballast resistors. And finally, check the ECM.

Rock auto has it all cheap.
Seeing you didn't list your year,MIT could be an 81-93, you will have to select your truck.

https://www.rockauto.com/catalog/x,make,DODGE,vtype,US%2CCA,a,www.google.com+Search+for+1983+dodge

have you checked the hall effect sensor in the distributor?

Its a 1990. I have replaced the hall effect sensor in the distributor. A gentleman i work with told me that i could have not torqued the intake down tight enough and when its cold it has a vacuum leak but when it warms up the intake material expands and it seals the leak.

Hi powerddge 1138.

HAd a 360 in a Fury that did that. They are fussy about timing. Check the ICM board. Usually if the ballast resistor goes you lose all ignition. Also check for vacuum leaks. These engines do not like vacuum leaks. make sure if you have any vacuum activated accessories i.e. heater ac system that there are no vacuum leaks there either.
Hope this helps,

preachp

since people seem to be completely missing it the truck is a 1990 i figure i would point it out. it is fuel injected. no ballast resister. it is all computer controlled ignition.

do you got a cam in the engine? the only reason i ask is i think 19in-hg is bit low. mine usually sit around 21 in-hg when i don't have a leak.

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