'93 Lumina 3.1

[solderman]

Hello:
I'm posing this just to make shure I'm going in the right direction. The Lumina was running a little rough with the ac off but ok. Ran smooth with the ac on. Yesterday it just died. Will crank but it would not start. Just replaced the fuel filter about a year ago so I think It's ok . I disconnected the fuel filter and verified that the fuel pump is running for about 3 seconds after I turn the key. Fills a coffee cup less than a third of the way. Seems to me that the pump is working.
I measured the spark plug wires with my ohm meter and it is about 10-20k. According to the repair manual it is supposed to be below 30k.
I even metered the spark plugs and checked the gap(.045) just to be shure.
I have a pen type spark tester and had had some one crank the engine while holding the tester close to the coils where each of the plug wires connect. I could not detect a spark form any one. I purchased a 'High energy ignition spark tester" and still could not detect a spark from any of the front 3 plugs.
I'm down to checking the crank position sensor. The repair manulal that I have doesn't show the location of it. I'm thinking it's somewhere around the ignition coils.
Is there anyway to check the crank sensor?
Any input would be GREATLY appreciated. Thanks.

[jeffcoslacker]

I'm a little confused. If you ran the fuel pump with the line disconnected from the filter, you should have gotten about a quart of fuel (and a big mess) in three seconds if the pump was working. When I changed my filter, the little o-ring got unseated, and it was LEAKING more than the rate you described while running.

[solderman]

I just turned the switch to on. I didn't try to start it.
I believe that by just turning it to "on" would run the fuel pump for a few seconds just to pressurize the system.
Should I be getting more fuel out?

[jeffcoslacker]

It should run until pressurized, which can't happen with the line disconnected, so it would continue to run. These pump a huge volume at high pressure. If you disconnected the line, and turned the key on, it should empty the tank in a few minutes, if you let it go.

I don't think you have enough fuel pressure.

But, you should check the pressure at the rail on the intake with the key on. I forget the spec, but you gotta have at least 35 psi or so I'm sure.

I've had a hard time detecting spark with inductive testers on cars since the 90's, try pulling a plug wire and putting a good plug in it, ground the plug to the motor, and crank it to see what you get.

[cadgear]

AFAIK, the ECM commands the pump off after no signal from the crankshaft position sensor for (x) period of time, which is why the pump cuts off if the engine is off.

[solderman]

I replaced the crank sensor. Still will not start. I checked for codes, all 12's.
Ideas?

[solderman]

Hello:
I bypassed the pump by applying 12v to the connector on the left side of the engine compartment by the strut tower. The pump runs.
I pulled the relay to the fuel pump and put my meter on the terminals to the coil to the relay.
I see the the computer applying power to the coil of the relay when I turn the switch to on. But when I crank the engine there is no power to the terminals.
Also I cannot find spark on any of the plugs.
ECM?????
Thanks

[Fireplug]

Ign module under the coil packs is the first place that i woud have looked at

[public]

Ditto--Ignition module provides spark up to 400 rpm. Then the ECM takes over. If you not getting to 400 rpm then the ECM is not getting a chance to take over. AutoZone will test your module for free if you take it to them. Good Luck

[solderman]

Yesssssss!!!!!!
It was the ignition module. Totally dead.

Thanks everyone!