HELP Aem Series 1 EMS Crank No Start Has Spark and Fuel Stumped.

[hanzbrady]

Originally Posted by Tjk2world

Isnt it odd though how the aem disk i was previously running produces no fuel or spark? If I had the slightest clue how to tune i would be messing around with that.
Mechanincal timing is sound (both chains were found to be out of time when i bought the used motor and were corrected by a shop that i trust). As for ignition timing do you mean in the software or at the distributor? Distributor is for sure in properly and not 180 out, but as far as in the map i dont think the tuner touched ignition much in the software.

I was referring to the software. You have to match what the ECU is outputting to the what the engine is set to.

For example you can install the CAS on an SR20det 180* off but correct it in a Megasquirt ECU by changing the tooth #1 angle setting in your ignition settings.

So look around your ignition settings and see if you have anything close to "tooth angle" this tells the ECU when to actually fire a spark.

Also you said that changing the discs gets rid of your fuel and spark, well last I checked the distributor isn't hooked to your fuel pump so fuel shouldn't be effected, unless you're only changing the disc and not setting it in the ECU. The ECU doesn't know what physical components you change, so if you swap discs you have to tell it that you did or else it'll try to fire on the stock Nissan pattern and wont.

[Tjk2world]

Originally Posted by hanzbrady

I was referring to the software. You have to match what the ECU is outputting to the what the engine is set to.

For example you can install the CAS on an SR20det 180* off but correct it in a Megasquirt ECU by changing the tooth #1 angle setting in your ignition settings.

So look around your ignition settings and see if you have anything close to "tooth angle" this tells the ECU when to actually fire a spark.

Also you said that changing the discs gets rid of your fuel and spark, well last I checked the distributor isn't hooked to your fuel pump so fuel shouldn't be effected, unless you're only changing the disc and not setting it in the ECU. The ECU doesn't know what physical components you change, so if you swap discs you have to tell it that you did or else it'll try to fire on the stock Nissan pattern and wont.

Thank you so much for helping! I should have been a little more clear, pump still primes the same way, but with the stock nissan disc i get pops and the plugs are drenched, but with the aem disc they are bone dry. I'll try messing with the ignition settings myself i guess

Any clue why values like engine speed, load, and injector pulse would freeze up during cranking? Is that a symptom of the ecu being shot?