OK guys this problem is driving me crazy the car starts up runs really ruff(popping and sputtering backfires) for about 3 seconds and dies and that's it the car had a aem ems on it running speed density but im putting it back to stock. what else can i check other than map,maf, also it was starting with rc 750's but now that i put the stock 560's back in its not starting ???

 

Well i have a question who built this 2.4 ? Does it have cam gears on it ?

Also with the stock ecu are all the injector scaling and trims stock ?

 

I don't know who put it together its not my car im working on it.Also it does have cam gears fidanza the gears were on wrong when i got it (the doel pin was in the hole for dsm's),And everything on the ecu should be stock at least that's what he told me

 

up

 

You can't just remove **** from the car and expect it to run...You took higher flowing injectors out and tried to run lower flowing injectors on the same map. Of course the car isn't going to run....The bigger injectors were tuned on that map. In short the smaller injectors are not giving the car enough fuel to idle. I wouldn't try to start/drive it unless you return it to how it was w/ the AEM tune working OR get a fresh tune with the new parts. Best of luck

 

Its not on the aem any more its back on the stock ecu....please read the post

 

Ok so when you fixed the cam gears did you end up retarding them anyway ? because with a 4g64 and a 4g63 head you need to adjust the cam gears to degree the cams back to zero ?

If so then hows about... your the one that had started the other thread about switching from aem back to stock sd right im assuming now just havent gone abck to see who posted i.

So you did change the aem crank trigger back to the stock one i saw right ? Any possibility that its on backwards ? There is a notch in it to sit on the key way so that should be good im assuming.

 

They are re-tarted 3.75 degrees ,I never posted about switching from aem sd to stock sd,The crank trigger is the oem one

 

you do have the maf back on the car right?

 

Damn it, you beat me to it. Also what map sensor is in the car?

 

Found the problem the cam sensor was cracked in the case changed it and she fired right up thanks guys .