sl99ls1

ok i was driving home on the freeway and my ses light started flashing, its been on because i dont have cats. but my car start shacking when i got on the gas, when i got off the freeway there was a little white smoke coming out my tail pipes and the light would stop flashing at an idel. i changed my spark plugs and my o2 sensors and its still doing this and it has never over heated and it has normal temp and the oil is fine please help???
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litle88

iTrader: (20)

Flashing light (ses) is a misfire brotha!
If you can get to an autozone they will read your codes for free, get them and get back to us.

sl99ls1

i did and it was just the one for not havin my rear o2 sensors in

litle88

iTrader: (20)

got the numbers?

sl99ls1

na i forgot them

litle88

iTrader: (20)

how do you know what they are for?

sl99ls1

my friend works at firestone and scanned them and it tells you what it is, its a snap on scanner

litle88

iTrader: (20)

WOW I never heard of this, but maybe it is your fuel injectors ( like one going out while under load?)
Add some fuel injector cleaner, a coilpack?
How many miles?

ChocoTaco369

POP goes the spark plug!

Sounds like you have a bad plug.

sl99ls1

this is the code i got p1133

orangeapeel

iTrader: (18)

that is an o2 sensor heat code. Misfire will cause the light to flash like said before. Never have I seen one flash from the oxygen sensors, and I have run dyno time on a lot of cars. That is from a front o2 sensor, so you may have a fouled out one that is just not getting the heat it needs. As for the flashing code. You probably won't get one unless you data log it with EFI Live or something. Also can't help but notice that you have changed out your wires from stock to MSD's. I would check your plugs and possibly get some stock LS2 wires and send those MSD's packing if it still doesnt clear up from the plug check/change. My guess if it is a coil pack causing it it will show up as #7.