ka24 - sr20 swap...Cranks but no spark

[skaterfromvt]

Swaped a ka24 sohc out with a sr20det black top

have it all dropped in and wired up it cranked over when key was turned but could not smell fuel in the cylinder and checked for spark on the plugs and there was none..pulled the fuel line and there was fuel at the rail..so the pump is working can also hear pump turn on when key is turned to acc

What can i do to get this thing to turn over and run?

any ideas?

[SR20phantom]

Check main ignition power wiring by battery and ECU. Also check for bad ignitor, bad coilpacks, bad ECU, shorted harness. Ignitor passes ECU pulse on to coil packs, crank the engine and test with multimeter for ignition voltage pulses at ignitor input and output to isolate source of problem.

[Hijacker]

I have a feeling that you didn't wire the chassis -> EFI harness plug properly beside the battery tray. Double check to make sure that the main ignition power wires are wired in correctly (Black/red and Blue/Red). I fyou do, then check for continuity and make sure all of your grounds are in place (primarily the one on the back of the head)

And Phantom, the ECU doesn't pulse to the coil packs, it breaks continuity to the coil packs. The basic principle of ignition coils is that there are two coils. One is the main coil that is continuously charged. The secondary coil is connected to the spark plug. When the ECU breaks the circuit for the primary coil, the power jumps to the secondary coil through some scientific explanation, and it also rises in power to the neighborhood of 40,000v. The ignitor chip is more or a resistor than a capacitor as it relieves incoming voltage stresses from frying the ecu by bleeding excess voltage into the grounding system.

[skaterfromvt]

Hey thanks everyone for their help but after working on it from 4 til 11 tonight testing everything I could possibly think of...Here is what i found wrong

1. Cam Angle Sensor ( was broke during shipping so lines were not hooked up properly ..i had the blacks reversed

2. Coil Packs were not grounded

3. Fuel Lines Reversed...sr20 Fuel Filter to fuel Rail... then Fuel Pressure Reg to Return line...Didn't make sense when looking at it...but it worked

4. also Injector Harness was not fully clipped in

She Fired up after all that work...any Suggestions on what i should do now that its fired up any safety tips with the new motor break in would be helpful...kind of scared to run it after spending all the time and money under the hood! :p

[RotoryGuy319]

So Mitch... the 240 still aint looking to healthy. Maybe one of these nice Sr guys can help us out.

ANY SR GUYS PLEASE CALL 802-309-2055, His name is Mitch and hes cool for you to call him anytime. He needs his 240 for a drift event next week. Please help.

[skaterfromvt]

Hey thanks Kurt

Yea the sr20 isnt working anymore...it was only running on 3 cylinders wasnt getting fuel to the 4th in line (front of the motor) so i pulled everything and switched the harness and ecu..except the ecu i was trying to get to work was fried...so all that work for nothing..and now when i tried to go back to 3 cylinders...nothings working....

I pulled the Cam angle sensor and turned the power to on...and spun it by hand...injectors are not clicking

Is this a bad ecu now?