DGageSS

iTrader: (9)

i went out with a couple of friends earlier and we were messing around. Anyways, while racing an 03 cobra, my check engine light started to flash. I dont think its emissions cause i have a bad stock catalytic converter and the light has been on for quite some time. Anyways lately, when i run the car hard it seems like it has a hiccup at about 4k rpms. I dont have a clue what is wrong i have read misfires as wells as emissions. Please help me figure this one out. I raced a total of three times and it flashed all three. Then in my little town, i started to get on it a little and redlined a couple of times and no flashing light. I have no clue what is wrong, again PLEASE HELP. Thanks.

RedWS6 00

What mods have you done, what vehicle is it?
It could be an emissions related problem like O2's. After I fitted LT's I got a flashing SES light going on, but came and went and during usual driving.

stevied916

iTrader: (30)

Flashing check engine light is usually a misfire. You need to scan the car and see under what conditions it misfires. This is probabally why it hiccups

ChrisS@sdpc

Double check your codes with a scanner, at Autzone, etc. Most likely a misfire problem (flashing MIL). I would examine all your plug wires and pull the plugs to have a look.

DGageSS

iTrader: (9)

thanks for the help guys. i have stock exhaust except a catback and this is on a 2000 Camaro SS M6. i also have intake and gears. After it flashes it goes solid again. I haven't plugged it in yet, but I was going to get it checked in a little while. Any more help is greatly appreciated.

BUMP

DGageSS

iTrader: (9)

oh it goes solid because, as stated, i have a bad catalytic converter. thanks again

DGageSS

iTrader: (9)

plugged it in and had a 3rd cylinder misfire. Stock plugs and wires. 75k on the car. I am going to get the NGK TR55's and MSD unless someone knows anything better.

Viper

iTrader: (6)

Replace your fuel filter too if it has 75K on it.

Old Geezer

iTrader: (3)

what do you mean, "bad"?? As in plugged up, melted brick, leaks,???
Get it plugged up enuf, and you can expect excessively hi back psi, hi egt, and such.
Why would you race it, knowing you have a serious problem???

DGageSS

iTrader: (9)

what serious problem. The cat is not plugged its gutted and i havent bought a new one. This is the first time for the misfire so i stopped and took it home to park it and then fixed it like 2 days ago. The next day it was fixed. My plugs were so worn down they had a gap of .086!!

Old Geezer

iTrader: (3)

"i have a bad stock catalytic converter and the light has been on for quite some time."
Maybe, if you had described the cat as being gutted, not "bad", one could make a better asessment of the problem??
Now, .086 gap is "bad"!

DGageSS

iTrader: (9)

ya it is thanks for the help geezer