stalling when letting out of gas (sctproracer)

[KINGCOBRA86]

I didn't make to many changesi think lol to my new combo I installed 3.5 cooling pipes vs hellion 2.5 in a 3.5 x 12 housing
maf is hpx e id1300 e85

1st start up it ran very lean cold or warm I had to add 12% more thru the mtf got it down to 14.xx

1st test drive I get in to 3rd (auto) I let off and rpm just drop to zero I had to keep reving it when I come to stop


old combo

4.6 teksid stock heads custom cams straight up and 8.5 compression stock hellion 2.5 pipes

new combo
boss 323 fox lake heads s3 custom cams deg 110/120 3.5 cooling pipes and intercooler 23x5'' thick

ive keep the same inj and maf and fuel syste

thanks rob

 

[oxfordgt]

If it ran before with the same MAF and injectors then put the MAF xfer back where it was. What stoichmetric ratio is in the tune? Did you just switch to E85? Did you test the E85?

 

[KINGCOBRA86]

I'm using the same tune, it started just fine just af was 16.00 cold and at warm temp ran fun just showed 16.0 . Had to add 12% more to get in the 14.60 rang it e85 been running it for a yr I'm going to test later today

 

[oxfordgt]

Bottom line if it was already tuned and MAF was dialed in then you should not have messed with it. Something else is off.

 

[KINGCOBRA86]

Found out my maf pig tail adapter was not in all the way, once I would put load it was rocking loose. I did have to add some fuel to stft since all my cold side is new and drop pressure