Mike96z

iTrader: (78)

What do you guys think is causing this?

here's a vid.


Click here to see Video

Omec

iTrader: (2)

possible carbon build up. id start pulling plugs and simple things like that first.
ever get a tune?

Mike96z

iTrader: (78)

its an LS1 in a 96Z, new plugs, new wires. was told its because of it being open headers.

silverLSWON

iTrader: (16)

nice car have one just like it, i would say open headers, the o2's are so close to the opening of the header so there might a chance of air getting in there giving them a false reading

Gordon0652

iTrader: (4)

You need a tune! & maybe new o2s.

Gordon0652

iTrader: (4)

That also.

RedRallyeZ

iTrader: (20)

that was my first guess, cold air hitting o2's. put some pipe on there t osee if that helps

Z28LS1camaroguy

iTrader: (3)

your more than likely running rich as hell, and too much fuel equals pop. Gonna need new 02 sensors and a tune for sure.

brad8266

iTrader: (23)

Open headers will do that, especially since the O2 sensors are right there in the open air, they will send a false lean signal to the PCM which will dump more fuel in trying to compensate for a false lean which will in turn make it really rich. A very rich mix will not fully burn in the chamber and instead will dump into the header and ignite there. Get some pipes on it and you should be fine, you should not need a tune, the PCM can compensate.

Mike96z

iTrader: (78)

wont need o2's. i dont drive it, just start it about twice a week to keep it fresh. not driving until i get the xpipe on.

brad8266

iTrader: (23)

What do you mean you dont need O2's? Are you running an open loop tune?

Mike96z

iTrader: (78)

i have them, i dont need to replace them if im not screwing them up by driving it daily. i just start it up twice a week

Mike94ZLT1

iTrader: (3)

Keeping it fresh? You're doing it more harm than good running it like that... It's an engine, not a piece of fruit. It isn't going to spoil, let it sit until you have what you need.

Mike96z

iTrader: (78)

its good to start an engine every once in awhile, not to let it sit.

Mike96z

iTrader: (78)

funny thing is i never had this problem running open headers on my LT1

NHRAMAN

iTrader: (1)

YUP....

SladeX

people store their cars over winter and start it like maybe once during a 4 month period. Some may never start it during that time.

You will be FINE leaving it alone until you finish the exhaust. You're only killing the O2 sensors by doing that. LS1 cars start scanning the O2's almost immediately from startup. I can get mine to toss a O2 sensor code if I try driving the car in cold weather without letting it warm up for a minute or 2 first.

Mike96z

iTrader: (78)

alrighty then. personal preference

5.3LJimmy

iTrader: (10)

Your cam position sensor is disconnected or faulty.

Mike96z

iTrader: (78)

its connected. thanks for all the input, will post another vid after xpipe installed.