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Newbie Tuning Questions (car won't run, well idle)

R

RNUOVR

New member
So I finally got all my new parts swapped on this weekend and limped the car home from a friends shop using the aftermarket tune that I'd had in the car prior to the last round of mods (was a basic tune for 1.8 rr's & a 3.4" pulley). The car was running like crap, but running. Last night I swapped in my stock PCM and flashed it to remove the DTC codes, plus my transmission changes & for my new 42.5 injectors. Now when I got to start the car it will run for about 3-4 seconds & then stalls out (tried this about 7-8 times with the same results).
Now I know that I havn't given a lot of information, Since I don't have a scan (again the car won't even run long enough to get anything), but I'm hoping that a more experenced tuner can point me in the direction of what tables I need to play with to get the car to run (idle), is it possible that since the MAF tables are completely stock that I need to play with them a little to get the car to idle properly? I know that before with the other PCM I was stupid lean @ idle & the car wouldn't rev below 2000 RPM

Car Has:
1.8 rr's
96 lb springs
ZZP Stage 1 TB
Ported Blower
ILGPC IC
42.5 lb injectors
PRJ Fuel Rails
HAI
SLP Headers
Full Exhaust
fuel pump hotwire
AEM wideband
8 rib crank pulley
 


ok....does it start right back up, or does it crank a little? Do you have to mash the gas to start it?
 
it will start right back up after. I have yet to play with the gas to see if I can keep the car running longer or not. I do know that the cars does lean out (as per my wideband when it stalls out, but I still have fuel pressure).
Is it possible that my MAF is so out of wack that it won't run at all?
before when it ran it was uber lean @ idle 17.x AFR.
 
It's very possible. If you think that it's still reading lean, then add to the MAF.
If you put all that on in one sitting, it probably does suck in a lot more air, you could also try unplugging the maf and see how it reacts.
 
I have never seen a car do that just because of the throttlebody....It is very possible though and good suggestion...I think it has to do with the fuel injectors...have you scalled the injector table any?
 
What were the dtc codes that you erased? check for vacume leaks?
 


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