I have a 2005 CR-V that had a K24a originally. Timing tensioner went bad, valves kissed pistons, it was a bad dad. So I bought a K24A1 (with an aluminum intake manifold, not plastic like the original engine had). I swapped it in and used the original throttle body assembly.

The issue I'm having is the car starts and runs. It smells and sounds to me like it is running rich and there's a very light haze of black smoke from the exhaust. It will start right up and run though but if I shut it off and restart it, the engine dies after exactly 3 seconds. The only way to get it to run again and stay running is to unplug the battery for a few seconds and then it starts back up. I only have 1 code which is P1157 and I believe it had that code right before the original engine blew up. When it shuts off after 3 seconds, it dies as if the key was turned off. Doesn't matter if I rev it up, it just dies.

I have checked timing, it's dead on. I've swapped all of the sensors from the original engine to the replacement engine as well with no changes. The crank sensor on the new engine was different and would not fit the plug on the factory harness anyway, so I re-used the original crank sensor. It's not the key immobilizer, the green key light on the dash comes on at initial startup but goes off as it is supposed to. I'm at a loss. Any help is greatly appreciated!

 

You replace the CRV k24a1 with a accord/element k24a4. Your 1st problem is the missing dual runner intake. You always have the actuator code with the aluminium intake. And the mixture is not good with that change. And the port designs of the head is different. The original motor have a head port designs like the RSX type S. The replacement you use have smaller port with a diverter for the swril effect. The bad news is the ecu compatible with the engine you use is not compatible with the CRV. You have to replace the engine with the good one. Or you can change all the valves of the new engine with the parts from the new one. Only cost you head gasket set.

 

Thanks for the input. I didn't swap a K24a4. Just to clear it up, the original engine is stamped K24A1 and the one I installed was K24A. I had that backwards in my original post

 

I get what you're saying but I left the actuator plugged in and secured it out of the way and haven't had any codes with that. Can I swap the ECU for an accord ECU? Will I need to get the keys reprogrammed? Thanks

 

The engine you install is the jdm version of the k24a4. If you swap the ECU from the accord the vsa and cluster may not work.

The accord instrument cluster have the speed signal from the can communication, crv is from the k-line communication.

The element one is closer to the crv but still not compatible.

 

It runs and drive and decent which I don't understand. What is causing it to shut off after 3 seconds after I try to restart it? I can't understand how the stock ECU is smart enough to to know I threw a different chunk of aluminum under the hood. All of the sensors are the original ones. I just don't get it.

 

The computer see different fuel mixture of whatever is suppose to have from the program. The shape of the intake and head is different, so the air that go the combustion chamber. If you Drive it long enough you may have code for too lean or too rich fuel mixture. For your idle, you use what throttle body? The iacv port is not block off?

 

I bolted the factory original throttle body to the intake manifold that came with the new engine

 

The rectangle groove for the air passage on the bottom of the throttle opening is the same on the two throttle? Because if not the iacv may not have air passage to keep the idle and the engine stall.

 

The gasket lined up and so did the bolt holes. I'll double check that though