Hey guys,

I swapped my EMS back in and it started/ran fine at first but later on I tried to start it again and the fuel pump wouldnt prime and the car wouldnt start. I'm positive it has something to do with the EMS since the car ran fine with the stock ECU. I have no idea how to read the EMS. I'm not sure what firmware is loaded onto it. Would somebody be able to give me any advice or maybe look at my map? Let me know thanks

Fred

 

If you have your .cal on your computer, you can email it to me and I can run through your startup and whatnot. Bspectuning@yahoo.com

Bill

 

Same here with the AEM EMS and double pumper....no prime car turns over but will not start.

 

Who setup your car on the EMS before? Do you have a laptop/pc so you can pull your cal, and a data log? Do you have any way to test the voltage at the pump?

 

Oddly i got the car to crank yesterday after I towed it....car wasnt cranked in three days and all of a sudden the pump primed and the car started...drove it around yesterday and today it decided to die again when i was driving back from the mall...the car died im neutral and i put it back in gear and gave it gas and the rpms continued to drop...parked and attempted four times to crank and on the fifth try the pump primed, it cranked and i drove it home...scared to drive it again Possibly a crank angle sensor thats dirty or loose????

 

You need to get a data log of what is going on with your AFR's when it dies.

How old are the pumps? How old are the relays? You might need to get a volt meter and start testing voltage. How does the battery look, try to toss a new one in.

 

Checking the EMS is simple. Connect with aem pro to the ecu so you can see live data. Click the icon that says tuning. Click the "locked" tab at the top of the parameters window. Select LS6 if you have an evo 8. Now crank the car and see if it reads "ON". If so then connect a multimeter to ground and set it to ohms 20. Then check pin #22 for ground when you crank the engine.

If you have ground then the problem lies in the relays or pump. If it does not read on, then their would be an issue with the software or tune. If the ecu reads "ON" while cranking but you do not have a ground signal, then the problem is the ecu drivers and will need repair.

Another way you can tell is to move pin #22 to a different LS driver and reassign it in the tune. Then see if you still have the same problems with it not running at times.

 

Well could these problems be inertmittent that you listed?? Drove it today with no issues and it happened yesterday but i got it to ntprime and crank with in a few minutes.

 

Drove the car 120 miles in rain today and no issues.

 

Dang. That does suck. Swap the fuel pump relays first. Its easy and cheap. Mine went out a year ago.