Weak spark, not starting 91 ka24de

Information on the naturally-aspirated KA24E and KA24DE engines.
BigDAT
Posts: 137
Joined: Sun Dec 12, 2010 10:09 pm

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Hey, I have a 91 240sx 5spd coupe, I recently rebuilt the engine, it was running good until I had a really leaky injector and the sucker died on me, I have fixed the injector issue, re-did the fuel system. now the car wont start, I replaced he distributor, and it got rid of my CAS code on my ECU, but it still has code 34 (knock sensor). I replaced the ignitor and still no change.

I have a really weak orange spark, car isnt starting. itll crank over, no actual ignition of the gas (I think that's why the knock sensor code is on)

oh, I also have no tach signal when I am cranking it over.


BigDAT
Posts: 137
Joined: Sun Dec 12, 2010 10:09 pm

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Tested power transistor wires, has 2.2kΩ (The correct resistance) I also tested the coil and I get 0Ω of resistance, but the FSM says I should have 0.7Ω.

The thing is, my Ohm meter measures in X100 and X1K so 0.7/100 will probably look like 0 still

PLEASE HELP ME!

Also I tried another ECU and thats not the problem.

Pro ViZion
Posts: 52
Joined: Fri Feb 25, 2011 10:47 am
Car: 1990 Nissan 240SX w/ KA24DE

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Was it a new plug when you checked?

I too seem to have a weak ignition.

BigDAT
Posts: 137
Joined: Sun Dec 12, 2010 10:09 pm

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Pro ViZion wrote:Was it a new plug when you checked?

I too seem to have a weak ignition.
Not sure what you mean? Spark plugs? My plugs are new.

BigDAT
Posts: 137
Joined: Sun Dec 12, 2010 10:09 pm

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Did a compression test:

160-170-160-160

BigDAT
Posts: 137
Joined: Sun Dec 12, 2010 10:09 pm

Post

Bump, still nothing.. replaced coil with new one.


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