jonfd

the car has a code random/multiple cyl. misfire detected any cules on a 2000 ta ls1 ws6

waterbug1999

iTrader: (3)

Maybe a O2 going bad...

Dmoney

iTrader: (22)

When was the last time you changed your plugs and wires??????????

Z's Z-28

was ur ces light flashing on and off? my car was doing the same thing. sometimes the code would single out a couple of cylinders, i would clear it, then the next time it would give me a random multiple misfire. i took my plugs out and they needed to be changed. my wires looked good (still have stock ac's on). that seemed to fix my problem. i went with ac delco iridiums, just recently changed to ngk iridiums.

jonfd

i put new ngks tr-55 in yesterday i will go get some new wires all try an let u no thanks.

Qwikness

Mine was doing the same thing. When I looked my header was melting my plug wire. New plugs, wires, and sleeves took care of the problem.

kistlerjm9

iTrader: (24)

ditto if u have headers sleeve the wires.

jonfd

well i do have headers so i will get some sleeves thanks again had to order wires no one in this town had any.

waterbug1999

iTrader: (3)

I mentioned an 02, on my 04 Z71 Silverado, it was running like crap and the SES light came on. Had a buddy scan it and it did say mulitiple misfires. Come to find out, my 02 on that side was not switching to the correct voltage siggesting it was going bad. Changed out the o2 and problem fixed.. So, if the above does not work, see if you can chase it to one side or the other.

jonfd

my o2 are not even hooked up the ones on my headers just wires hanging

waterbug1999

iTrader: (3)

Why are they not hooked up?

jonfd

i bought the car already with headers. it was set up that way.

jonfd

well the problem was num.5 valve spring broke . so i will change all of them and valve seats .