Intermittent Starting Issue

[Fracture]

Out of no where, I've been having an issue with my 1991 Accord where it will crank but not turn over. The fuel pump makes priming noise, the main relay clicks, the plugs/wires/battery are all new. This issue only happens sometimes (maybe 50% of the time it will turn over and run fine and the other times it will just crank and crank with nothing but maybe a small sputter then nothing).

I am thinking it may be the igniter or crank sensor in the dizzy going bad. Any ideas?

[deevergote]

Crank sensor is unlikely. Igniter is a possibility. They usually act up before failing, but not always. A failing igniter will usually make the tach flip out before it totally quits on you.
Check all of your grounds and battery connections. Dirty connections can cause exactly what you describe. I had that happen once after a new battery, and I was at my wits end until I cleaned the connections (with Coke, as I was drinking it at the time and I remembered the old myth about Coke delivery drivers cleaning their battery terminals with the stuff... don't use Coke... but do clean the connections properly.)

Check all battery and ground connections first, as that's free.
Next, pull a spark plug, crank the engine, and smell for fuel. It's possible that your injector resistor box crapped out, and the injectors aren't firing.
Then look into the ignition coil, since that's the next likely culprit (especially the 91's internal coil. If it's original, it's probably long overdue for death.)
Igniter should be fourth.

[Fracture]

Crank sensor is unlikely. Igniter is a possibility. They usually act up before failing, but not always. A failing igniter will usually make the tach flip out before it totally quits on you.
Check all of your grounds and battery connections. Dirty connections can cause exactly what you describe. I had that happen once after a new battery, and I was at my wits end until I cleaned the connections (with Coke, as I was drinking it at the time and I remembered the old myth about Coke delivery drivers cleaning their battery terminals with the stuff... don't use Coke... but do clean the connections properly.)

Check all battery and ground connections first, as that's free.
Next, pull a spark plug, crank the engine, and smell for fuel. It's possible that your injector resistor box crapped out, and the injectors aren't firing.
Then look into the ignition coil, since that's the next likely culprit (especially the 91's internal coil. If it's original, it's probably long overdue for death.)
Igniter should be fourth.

Ok, so let me get this straight:

1. Battery terminals and grounds
2. Injector box (where is this located in the engine bay?)
3. Ignition coil
4. Igniter (I thought in these distributors the igniter = ignition coil?)

[deevergote]

Injector box


Location


Ignition coil and igniter (ICM)

[Fracture]

Injector box
[IMG]http://i1089.photobucket.com/albums/i354/cyotani/IMG_0992.jpg[/IMG

Location
[IMG]https://i.ytimg.com/vi/0tMzbPJMvYI/hqdefault.jpg[/IMG

Ignition coil and igniter (ICM)
[IMG]http://www.team-integra.net/images/BAEC1978-D3A7-4405-AB2D-2761DC15A96D/articles/meltman/timing/05.jpg[/IMG

Thank you, that is very helpful.

I noticed that when it doesn't want to start, it turns over but sputters out real quick. If I pump the gas, it will turn over as well. It also seems that the RPMs at idle have raised to right at 1000, when before this issue it would float around 600-700. Could the IACV be stuck? Would that cause it not to turn over (but actually cause it not to idle/be starving the engine of air?)