92 z28

i have a 99 ws6 and the car wont stay on. i start it up and 2 seconds later it dies. before this issue occured the car was bogging down while driving and idleing until it eventually died and i had to get towed home. its not the fuel pump as i have stable pressure. i suspect it may possibly be a possible anti theft device? at this point im so confused i have no idea what to think. please help!

ProjecT 9

iTrader: (6)

bad gas maybe? i had this happen once when i got some crappy gas...i had to keep reving the engine to keep it going, once i got rid of some of it, i added some new gas from shell and it was fine....just a thought

Jon

JBIRD02

iTrader: (4)

had a similar problem not long after my header install, turned out to be the o2 sensor. I replaced it and its run great since.

cyphur

iTrader: (10)

its not anti-theft, your car wouldn't start at all.

92 z28

a bad O2 sensor could really cause the car not to stay on? correct me if im wrong but i thought most cars could even run if the O2 sensor is dead.

8-Pack

Thats what I would think as well. Is it cutting off, or is it bogging down and dying? If you suspect electrical problems check the igntion switch.

92 z28

to me it seems like the car is trying to shut itself off, even when i give it gas it tries to shut itself down.. how do i check the ignition switch?

custom 68

iTrader: (9)

you might check you battery I know these things really need good voltage.

92 z28

its deffinetly not a power issue, it has plenty of juice.

JBIRD02

iTrader: (4)

it wasnt the o2 sensor itself, but the electrical connector on the o2 that was plugged into the o2 extension. It would spit and sputter and it cut out on me twice driving down the road.

92 z28

which 02 sensor would that be? from my understanding there are a few 02 sensors on these cars... im new to ls1s.

92 z28

alright, i checked all 4 02 sensors and all the connections seems just fine. what else can it be?

92 z28

so i scaned for codes and no codes.. im suspecting the chip on the key may be damaged or the ignition switch is damaged.

92 z28

i got a new key cut this morning, the car is still doing the same crap.. what i did discover was that if i rev her up to about 3grand as soon as i start her up it will stay on if i maintain it above 3 grand or so... what could this be? please help!!

TNTramair

iTrader: (15)

people often neglect the littlest things...id check your plugs and/or gaps, may just not be running right b/c of them...if it does start and run as long as your foot is on the gas than that rules out the ignition switch/security feature cause it wouldnt even start if this was the problem.. check into your ignition items...plugs/wires/coils. check your connections for your sensors, just b.c there arent any codes in the system doesnt mean one of them isnt acting up.. crank position/cam position..etc. goodluck, let us know when you finally figure it out.

mmmchickenboy

look for a vacuum leak too, that can cause the engine to run rough, and even cause it to stall out.

92 z28

i dont know how to check if there are vacuum leaks, but where are the crank/cam position sensors located? im going to check those today but what else could it be?

SSAnderson

Did you solve this problem? If so what was it?

92 z28

sorry i didnt reply sooner. it was an MAF sensor. i would have never figured it out if i didnt take it to the dealer.

Strahley

iTrader: (4)

I was gonna ask if you've modded the car and if you've touched the MAF

But it looks like you found your answer