I cant get the car to stay running, and i cannot figure out why.



the symptoms:



Car will start every time, jump to about 2k, and sit there for a few seconds. It will then procede to just drop RPM smoothy till it just dies. If you try to nail the gas, it dies. You have to feather the gas pedal to keep it running.



If you let it sit for a while, and try to start, the car will stay running. I had it going for about 5-7 min today. If you touch the gas, it dies.



I have basically changed everything over the winter, so its going to be hard to track down the problem.



Here are the mods i performed:



-dual walbros

twin relays with direct 12v power, grounded to the battery

-550/1600

-aeromotive FPR set at 40lbs.

-I am getting a steady fuel pressure according to the gauge.

-xst04s kit (shouldnt make a difference)

-blocked off everything emissions/stock related

-AEM CD2i

-Power FC with a BRAND NEW engine wiring harness

-removed double throttle system



I have the stock map loaded into the PFC, that should not be the problem.



I dataloged one of the cars cycles, and nothing looks out of place. Good 13.5v power untill it dies...nothing out of the norm...



Grounds are all attached and look fine.



I cannot find any obvious vaccume leaks, and i sprayed carb cleaner around the manifold when it would stay running with no change in idle RPM.



the 550's are not leaking.



I cannot think of anything that would make it run like this. Please help :(

just replaced the relays...same exact ****.

Have you tried it without the AEM?

yes. The AEM harness has a loop connecter to eliminate the box. Same ****.

did you punch out the pins from the harness?

fuel filter?

You sure the coils are firing?

No, not yet. Shouldnt be the problem yet tho. The old harness did have the wires cut, witht he same result.





Have two new fuel filters for each feed line from the walbros.





I'm pretty sure. What is the best way to test the coils?

so once it is running as it starts to die does the fuel press trail off? sure the pfc is set up correctly? check coils just by pulling a plug wire and grounding it. ohming will check the primary resistance fwiw. tps, iac?

Found the problem. There is sopposed to be a filter in the line to the map sensor. I had a check valve...but i think i have pictures of it being like that before the motor was pulled...when the car was running. Who knows, but its fixed. Now the idle is going 1000, 2000 up down up down non stop



but the car runs



and i took it down the street



woot