lsxTAlemy

iTrader: (2)

hey guys i just stripped the car took out dash to take out all the ac suff. brought the motor down for head and cam swap 241 ported ms3. mostly every thing is back on the car except power steering ac compressor and all the other ac stuf. the ground under the car on driver side is on. the both tower ones on pass are on. the three behind the head on driver side on, and the ones on each corner on the dash are on. all fuses are good everything looks good.

now when i hit the key motor fires, but doesn't stay on. it fires for about a sec and dies. i have fuel pressure and obviously have spark. i have tried holding the throttle slightly open to see if it will rev but no luck at all. one thing we think might be the problem is the factory alarm. the light is blinking tried unlocking the car with the key and nothing. my tuner told me that it might be the alarm and that he can disarm it with his tuner.

what do u guys think might be the problem im pulling my hairs out here.

thanks in advanced

problem solved last page is the answer here's the vid

http://youtu.be/5U3TFq__wwU

dodson55

iTrader: (18)

have you tuned it since the head cam swap it sounds like to me thtas the problem

lsxTAlemy

iTrader: (2)

well i had a tune for the stock head cam nitrous set up. but i haven't tuned for the new heads and cam. iv seen most people just getting and starting the car untuned. they just hold the throttle slightly. fires and dies right away id thought sense if fires i would be able to keep it alive with the throttle.

bww3588

iTrader: (49)

VATS...if your tuner can't tune it out, it's time to find a new tuner.

Sales2@Texas-speed

iTrader: (5)

VATS would also be my guess! Get it tuned!

lsxTAlemy

iTrader: (2)

vats??? what is that. im pretty sure he can he did my previous tune open loop speed density.

Old Geezer

iTrader: (3)

Maybe the correct forum would get some responses???

dodson55

iTrader: (18)

i have never seen vats on a fbody make it start then die they usually wont crank at all or if they do crank they will never start

mkvamso

iTrader: (2)

Same injectors?

bww3588

iTrader: (49)

VATS will let it start then immediately die.

lsxTAlemy

iTrader: (2)

yes same stock injectors, but when i open the door the alarm light starts flashing. then i close it and it stops. the security light come on when i hit the key and then it cranks and dies on the spot. some times it doesn't crank at all.

lsxTAlemy

iTrader: (2)

spoke the the tuner and he told me h didn't want to by pass it so i can still have an alarm

MM98

iTrader: (13)

Does the security light stay on with the key in the on position? If so have your tuner turn off the VATS (anti-theft system) as others have stated.

lsxTAlemy

iTrader: (2)

is there any other way. tuner is book till late next week honestly im dieing to it run

MM98

iTrader: (13)

You can bypass the system with the correct ohm resistor.

lsxTAlemy

iTrader: (2)

i have ohm reader to read key. radio shack would have it .

Sales2@Texas-speed

iTrader: (5)

VATS will let the car start and then die.

MM98

iTrader: (13)

Yes, Radio Shack will have the resistor(s) & they should be able to ohm your key as well.

lsxTAlemy

iTrader: (2)

is this known to fail from one moment to the other? it had never gave me a problem before just now that i took the dash off.

MM98

iTrader: (13)

It's a very common problem on these cars.