I just pick up my 03 subaru wrx from the Dyno, it just got the new VF34 , with Helix 660cc injectors, walbro fuel pump, helix catless up/down pipe and a accessport. since i got the catless up pipe i got the 2.0 resistor to fix that CEL and the down pipe came with the fix.

I have been driving around and it seems to be running fine only when i start it and when i have to stop then it idles at half to 0 rpm and sounds like it just wants to stall..... and it has stalled twice now and when i start it back up i have to give it more gas just for it to go. it is running a little rich but the guy said nothing to make the car act like this.... normally when i start the car up I let it warm up and it idles okay almost at 1 rpm it really starts to act up when i have to stop. whats wrong with my car.. could it be the 02 sensor ?please someone help me! i hope this guy did not screw up my car.

 

When you had it on the Dyno, did they tune it as well? Also, what map are you running from Cobb? I would give them a call, if nothing else. They have some great tech support and should be able to help or at least give you some ideas as to where to start.

 

they used the accessport and i think they just used stage 1. See he hasnt really told me a lot and i asked for the dyno run and he said he would email it to me and i havent received it yet. So i am a little scetched out right now. i am bringing my car to them "TDCtuning" on thur. someone said it could be a leak in a hose. so who know at this point. it was acting a lot better later on in the day when i was driving it more. it's only in the beginning when i first start to drive my car. So i really don't know..... : o/ and my check engine light isnt on so thats a good thing.

 

he said he used a a custom tuned map due to me having 660cc Helix injectors. I had to get them at the time because the STI ones were on back order......

 

It sounds like a map problem and an issue of how much fuel is being regulated. First thing I would do is call Cobb to check on the map for stage one and what injectors they support with that map. The issue might be that the map used didn't account for those injectors and it might be running lean. Or it could be you just need to use a different base map. Also, the reason it sounds like a map problem, is your ECU sounds like it's already starting to adjust on it's own by regulating things out a little more and starting to run better. But I would call Cobb to be on the safe side.

But as far as the custom map is concerned, you need to make sure they stay on top of this in case it turns into a bigger problem and make sure they get you all the information on the custom map and your dyno run.

 

okay so now my boost gage flutters and knocks down at full throttle.... does that mean a vac leak for sure and not an 02 sensor??? ugh... i am going to email the guy right now!!!