For starting problems, the K-Test is usually sufficient to test the ECM.

Hi
I did the k-test I'm reading 4.9volts.wen I remove the connecter and try to stars it starts but for 2sec and go s off and check engine light stays on

If the Check Engine Light doesn't go out, then the problem is with the ACG (ALT) fuse, main relay, or ignition switch. Since the K-Test showed 4.9 volts, the ECM should be okay. Ensure the main ECM ground on the thermostat housing is clean (no oxidation).

I suspect your ignition switch may be bad.

Hi
Wer is the ACG (ALT) fuse

Under-dash fuse box. It may be fuse no. 12 or 24. Easiest thing is to check ALL under-dash fuses with a test light or multimeter, then you don't need to even know its exact location.

https://www.askmehelpdesk.com/cars-t...tml#post251124

OK ill do that rite away
Thanks

I checked it.its fuse 12 I'm reading batt voltage.
The ignition swich is new I think I have a short some wer what ill do ill disconnect all the connecters on the fuse box under the dash and lieve the 1s for the main relay and ignition switch so I can start the car and test it for 2days and see what happens
What do you think?

Is fuse No. 12 bad?

Here's how to properly and quickly test fuses:

https://www.askmehelpdesk.com/cars-t...tml#post252145

No its good I'm reading 12volts

Stay with it.

OK
Ill do Main Relay Harness Tests

Hi txgreasemonkey
I did harness tests
1. OK
2. 12.3volt
3. 12.2volt
4. 9.3volt
But got stuck with the 5th test I can't tell wich 1 is connector "A"

It's the connector on the left, with 26 pins, as you look at the connectors.

The test was OK
Still the same but thanks for the help it was useful and professional