Started my conversion. Need Help. Please

[chadapcb]

Started my conversion on my 1992 Mercruiser 5.7 350 reverse rotation motor Wednesday.

The motor was a carbed motor that ran fine after you rebuilt carb every couple of months.

Here my equipment.

1227747 ECM
O2 Sensor and Plate on exhaust elbow.
Fully Rebuilt TBI unit
All new sensors. ECT, TPS, IAC, MAP
NEW Wiring harness from PFISys
New Delco Distributor EST
New Coil
New Plugs and wires
New Electric Fuel Pump (SP1175)
2 10 Micron Filters one before fuel pump and after before tbi. Both New


Now here is the issue.

Cranks easily and starts easily only runs for a 2-4 seconds then dies.
Checked fuel pressure 15 psi at startup but wont stay running long enough to get pressure after start up.
checked all my voltages all are correct.
Distributor set TDC. with firing order 1-2-7-5-6-3-4-8

I feel that I am overlooking something or over thinking this problem.
Any suggestions are appreciated.

Thanks

[Dr_Grip]

-Check power connections: A6 wired to ignition-switched power (hot in crank and run, NOT crank only) using a relay. B1 and C16 to battery. C9 to crank only is optional.
-Check the fuel pump relay - can you get the fuel pump running for more than a few seconds by directly triggering the relay?
-Is the fuel pump input on B2 wired correctly?

[chadapcb]

The thing is I have bypassed the power on the Relays to gain constant power on fuel and tried cranking and starting to see if it was the fuel or electrical. Even with constant fuel pump it still dies after a couple of seconds.

[damanx]

Could it be the ignition control module or maybe a problem with the reluctor in the distributor?

[chadapcb]

I was just reading a similar scenario on internet.
They said in that one that ICM was cutting ties to the fuel injectors.

We investigate tomorrow

[chadapcb]

Well I was able to get out on for a few minutes today.
I checked all the preliminary voltage into the ICM.
I disconnected the Pick-up coil which I do believe to be bad.
I was reading in one of my mercrusier books and it said that the pick-up coil
should be between 500-1500 ohms.
So I set off to check this. my first reading was 3.075 K ohms which translate to 3075 ohms
So I pulled the distributor to check it again. Which shouldn't have any bearing at all.
That reading came out to 3.075 k ohms as well.
So went digging in the shop and found another distributor that was damage.
I check the pickup on it and it read .873 k ohms which is 873 ohms.

Is there anyone that has I pickup for a small cap that can verify that it in deed is between 500-1500 ohms.
Would be greatly appreciated.

[ony]

switch the green and white wire on the module if the engine runs backwards.

[???]

I had a pick up coil in a camaro years ago get me. I don't remember what ohm, but the book gave me a number and then leave it hooked up and spin the distributor and the ohm value should move. if I remember right, the numbers weren't right and didn't fluctuate when spun. replace it, it matched the book dropped it back in the car and it was fixed. weird little things but cheap and worth replacing when you have the distributor out anyways.

[chadapcb]

switch the green and white wire on the module if the engine runs backwards.

Please explain. The only reason why engine is reverse rotation is due to the gear to gear timing. The engine doesn't use a timing chain.
Distributor is turning in clockwise direction with firing order 1-2-7-5-6-3-4-8

[chadapcb]

I had a pick up coil in a camaro years ago get me. I don't remember what ohm, but the book gave me a number and then leave it hooked up and spin the distributor and the ohm value should move. if I remember right, the numbers weren't right and didn't fluctuate when spun. replace it, it matched the book dropped it back in the car and it was fixed. weird little things but cheap and worth replacing when you have the distributor out anyways.

I understand there is three test that you can do with a pick-up coil.

Test 1.
Use multi-meter to for the voltage being delivered to ICM should be between .3 and 1.5 volts AC
hook up positive and negative lead to pick-up and turn distributor to get volts.

Test 2.
Check for dead short. Check each white and green separately to ground for continuity. Should be infinite.

Test 3.
Check the ohm of the pick-up coil. Should be between 500-1500 ohms. Green and white wires to multi-meter and read ohms.

If either test 2 or test 3 doesn't check out replace pick-up coil.

[damanx]

The "test" that ??? is talking about I am sure he meant using the AC voltage function on the meter when spinning the distributor.

The resistance reading would change as applying an AC voltage to a meter in resistance mode makes the meter show weird values.

You should take the ICM and have it tested.

[chadapcb]

Test 1 is the use of AC voltage.

Also I had an extra ICM have already switch it out and still the same issue. Which lead me to believe the pick up coil.
Which lead me to checking it and coming up with over 3000 ohms on the pick-up coil

[damanx]

Test 1 is the use of AC voltage.

I know, which is why I posted what I did.

Somewhere around in my garage I have an extra distributor. I'll look for it while I am reworking my A/C.

And the reason for the swapping the green/white wires as suggested about would essentially be for "phasing" of the sine wave output from the pickup coil and the input going into the ICM.

[damanx]

You never stated, but have you tried to see if there are any error codes stored?

[chadapcb]

Yes I have hook scanner up and no codes.