Rayallen577
Junior Member
i recently swapped a 5.9l 360 in place of my factory 5.2l
I installed a comp cams “RV” cam shaft installed new coil, plugs, wires, distributer cap and rotor, crank position sensor, as well as various other sensors...
I got a 5.9l ecu from a local pull apart yard as i had read on other fourms that the engine would run with the factory ecu to the 5.2 however would run lean, so I got the used ecu and the truck runs however sort of rough I have not attempted to drive it yet, I then replaced my fuel injectors and bought a new refurbished ecu and the truck sounds great at start up and perfectly healthy however even with playing with the throttle it immediately shuts off with the new ecu. But it with the used junk yard ecu it’ll sit and idle as long as you want it to just not as healthy as I would like for it to be. The only code it is pulling is a p1495 which is for evaporative emissions I purchased a new one but have yet to install it, the TPS and IAC were previously replaced as well as the battery and alternator. I’ve checked my fuses and swapped relays I’m not sure what it could be.
I just don’t understand how it could run off the old used ecu but not the new one however starts stronger and sounds healthy with it just shuts off afTer 2 seconds
I installed a comp cams “RV” cam shaft installed new coil, plugs, wires, distributer cap and rotor, crank position sensor, as well as various other sensors...
I got a 5.9l ecu from a local pull apart yard as i had read on other fourms that the engine would run with the factory ecu to the 5.2 however would run lean, so I got the used ecu and the truck runs however sort of rough I have not attempted to drive it yet, I then replaced my fuel injectors and bought a new refurbished ecu and the truck sounds great at start up and perfectly healthy however even with playing with the throttle it immediately shuts off with the new ecu. But it with the used junk yard ecu it’ll sit and idle as long as you want it to just not as healthy as I would like for it to be. The only code it is pulling is a p1495 which is for evaporative emissions I purchased a new one but have yet to install it, the TPS and IAC were previously replaced as well as the battery and alternator. I’ve checked my fuses and swapped relays I’m not sure what it could be.
I just don’t understand how it could run off the old used ecu but not the new one however starts stronger and sounds healthy with it just shuts off afTer 2 seconds