ok i need help big time. heres the problem i blew a head gasket replaced the head gasket and now the car does not want to idle at all, tried to advance the timing that didnt work, checked the firing order that correct, new plugs, new wires, now after 2000 rpm it sounds smooth but once u let off the throttle it drops straight t 400rpm then tries to idle then dies. can someone help me please. O also when i took it around the block the engine light came on and i dont know what code it is but when i did the code test the light did this, blink blink, pause, blink blink, pause again so i dont know whats goin on.

here's my setup

ok heres my setup:
B18a head
Skunk 2 cam gears
3 agle valve job
crower 404's
Crower valve springs/retainers
Rc 310cc injectors
B&M Fpr
walbro 255lph Fuel pump
b18a block
ITR oil/water pump
.25 over Ctr pistons
Acl bearings
new oem crankshaft
Ls rods
B16 j1 tranny
XTD stage III clutch
dyno tuned wit a vafc
custom header

 

As u said the code is ur O2 sensor,
else is some.

 

ok fellas found out and fixed the problem, it was my valve adjustment. when my mechanic did the head gasket he didnt readjust the valves so i took it to another tech and he redid them so it idles nice now.

thanx for all the input fellas