Gen 3 to 4 engine swap failure

Found one reasonably priced on amazon with a year warranty and decent reviews.

 

Well I do believe prayer and it’s always about the time when I feel like giving up that I get a blessing and things work out. Thanks for urging me not quit I appreciate the spirit. I felt like I was driven to just keep resetting the ecu (disconnecting the 12 V battery and pulling the white main wire to the fuse in the front engine bay) and just getting the engine to turn over. I’m guessing after sitting in a warehouse for who knows how long the engine may have been gummed up maybe that’s just what it needed?

 

Yes It turns out the misfire was not related to the coil pack it actually was the wiring that went into the top of the fuel injector . And it was the same for cam sensor. Now I’m having an issue with a brand new water pump. The engine came with a water pump it didn’t seem to work that’s why I purchased a newer water pump now that this one doesn’t work I realize that the other one probably works because the impeller on it turns so freely just like the new one & so usually the best indicator when they break is that just freezes so I’m wondering now if it’s because its a generic brand or maybe there’s another wiring problem.

 

Yeah they are as I’m finding out a gamble. The one I just purchased doesn’t seem to work it just throws a code. So now I’m looking to buy another one I guess I’m gonna have to buy a really pricey OEM pump and send this one back. Or maybe it’s just another wiring issue as the misfire wasn’t a coil pack it was the fuel injection wiring as was the cam sensor issue also.

 

A gen 3 wiring harness & a gen 3 ecu would seem to make better sense using a gen 3 water pump. I have an idea. Why not hack the harness with thermostatic relay and just set it to the same temperature as the thermostat when it opens . You will get a code but at least you can drive and not need to worry if your cars computer is compatible with a very specific OEM water pump. I mean it like hit or miss with these generic water pumps ! And so how to connect an accurate sensor to the engine or the water hose would be the next idea ?

 

Do you know which pump works best for the gen 4 to gen 3 swap? The new Prius just bought just throwing codes

 

Its getting 14 v and the ground is good as well. The other two wires I’m not sure about. But there no breaks and the wires look good all the way back to the ecu,

 

Do you know the model number of the factory water pump? Does it make a difference if it’s on the GEN four engine?

 

I did . I always order through amazon.

 

So I bought another new water pump and I’m still having the same issue not sure what the problem is I powered up the new pump directly and it works fine but just after being in the car for a few minutes I gotta check engine light and the pump doesn’t seem to be working at all any ideas anybody? I swapped a couple of the relays and that didn’t work I’ve jumped the pump from the main fuse box that did work but the pump runs at full speed all the time so not sure what to do