Ka24de two dead cylinders SOS!!

[JettNebulis]

Alright where to begin. lets just start from the beginning. One night I was going out to meet some friend and my engine seized out of nowhere. So I let out a sigh and went "240 life". I should note my current problem wasn't happening during this time. I figured I would rebuild the motor rebuilt it. It did not want to hold idle and when I tried to drive it was sluggish. pulled it and bought a brand new motor from a shop figuring I did something wrong. I installed it and i currently have a similar issue. The engine will start and hold idle at around 800 (while chugging like a v8 and shaking the piss out of the car) but when I give it gas it jerks furiously. I started pulling plug wire till I narrowed down my issue and it was cylinders 1 and 2. see if i could move around the issue by moving injectors and switching wires nothing. I bought some b12 chemical carb cleaner and it ran normally for maybe 1-2 minutes then back to shit. spraying it anywhere worked iacv and throttle body. Someone help i've been trying to get my car running for like 4 months now. I just wanna drive again.

New stuff:
Clutch
Pressure plate
flywheel
throw out bearing
Engine
recently cleaned iacv
distributor cap
tps sensor
plugs
injectors
fuel pump
fuel filter
distributor connector
battery
temp sensors x2

[di-devol]

Check your grounds.

[JettNebulis]

As long as there is only 3 grounds that have to be grounded to the engine they should be grounded.

[di-devol]

It's a little odd that you had the same issue across two engines though. Has to be something you're missing.

[JettNebulis]

I know right. I'm going to a junkyard​ today to grab a injector see if swapping it out will do the trick. I am also going to check it's output make sure it's getting the right power.

[thegr8one013]

Sounds like something went bad in ur harness or ecu

[JettNebulis]

Should I crack open my ecu to see if anything is fried.

[di-devol]

I know right. I'm going to a junkyard​ today to grab a injector see if swapping it out will do the trick. I am also going to check it's output make sure it's getting the right power.

In your list you already said you did injectors, right?

Are you using parts from the old engine on this new one? Is it the same harness and ecu? Compression good? No ecu codes?

Where in Washington are you?

[JettNebulis]

Intake manifold and exhaust manifold are the only two old things. Same ECU and for the most part harness. I just got new wires today and got injectors from pick and pull it seemed to help a lot. I don't jerk around anymore and my idle is steady. I think I might have gotten a dud injector.

I'm from Puyallup.

[JettNebulis]

In your list you already said you did injectors, right?

Are you using parts from the old engine on this new one? Is it the same harness and ecu? Compression good? No ecu codes?

Where in Washington are you?
It still chugs like a v8 and shakes a little, but I took her for a drive now I have some bad smoke coming out of the back of my engine it seems to be coming from my transmission. I say this because it was coming out of my shifter and center console.