code 21

[driftn_silvia]

just swaped in a descent ka24de obdI motor into my 91 fastback. I have a situation, the motor cranks, turns over for about 3-5 sec. then it dies. pulled the codes of the ecu and got code 21 Ignition Signal Circuit. could it be the coil and coil pack? or the distributor cap or the primary wire? im lost in this part, Just need some pointers what the heck i should do? i've searched all over forums. and no answer.

thanx

[benefitx]

ka24de's dont have coil packs...did you plug in all the intake hoses?

[driftn_silvia]

yeah, my bad not coil pack, but the the ignitor is to the coil. thats what i was talkin bout. any ideas??

[MELLO*SOS]

Check your ECU plug, make sure it's tightened all the way down. Friends fresh KA swap had the same prob the other day.

If that's not it, see if you're getting spark out of your coil. If no, test the power going to the transistor/ignitor, you should be getting 12v there. You can also measure the resistance of the primary and secondary coils to make sure your ign coil is good; there are specs and instructions in the FSM for doing this.

[driftn_silvia]

thanx mello88 im going check those things and see the heck happens.