1BAD94Z

I have a built up 355 that is kinda runnin rich. Also when it first starts up when its cold it cuts out a little. When it gets warm its just fine. It runs a little rough in town as when it shifts in to overdrive it runs real rough kinda shakes. I have hooker headers and people are telling me i need front o2 sensors and that would help my problem out. Any advice?

RamAir95TA

iTrader: (2)

If you don't have O2s the PCM will default to fuel delivery on a "best guess" scenario. Additionally, your SES light should be screaming at you.

tricked94camaro

iTrader: (1)

^ what he said. thats why i plan on keeping my o2's

1BAD94Z

[QUOTE=RamAir95TA;14179999]If you don't have O2s the PCM will default to fuel delivery on a "best guess" scenario. Additionally, your SES light should be screaming at you.[/QUO

I do not have o2 sensors at all they were deleted when the last owner put hooker headers on it and the there is no check engine light at all. It has been dyno tuned could that effect the deletion?

RamAir95TA

iTrader: (2)

Without knowing what has been done in the tune it's kind of hard to draw any conclusions. But not having O2s on a setup like yours makes zero sense.

Additionally, what are your mods?

1BAD94Z

Thats what i thought honestly. But they welded up the holes in the headers where the o2 senors go.

And all the mods i can think of is its 030 over with everything needed, ported and polished heads, roller rockers 1.6, lt4 hot cam, lt4 intake, headers, cold air intake, uhm it was totally rebuilt in 08, had a electric water pump that quit on me i went back stock due to money, and thats what i can think of. Its also been dyno tuned a while ago back when the motor was built.

tricked94camaro

iTrader: (1)

you got all the paperwork?

1BAD94Z

Yep I have most of it all.

djjab57

iTrader: (17)

when u turn on the key do u see the check engine light ? just wondering if it is un plugged or burnt out

1BAD94Z

It comes on when i turn the key on.

tricked94camaro

iTrader: (1)

probably got o2's deleted from the ecm

BlackBird87

iTrader: (6)

Do you have a maf by chance?

1BAD94Z

Dont know what is MAF is lol thats my bad.

1BAD94Z

Thats what im guessing but it still runs like its running to rich so i dont know. Thinking about gettin new headers and running o2's....

tricked94camaro

iTrader: (1)

i would do just that unless you or someone else can weld some new bungs in the headers.

MAF- Mass Air Flow sensor.... between the TB and Air fliter

1BAD94Z

Ahh ic thats my bad. and yeah not sure which direction im gunna go yet.

tricked94camaro

iTrader: (1)

i would weld bungs into the hookers. make sure you have a bolt in the bung when u weld it in or the bung will warp.

1BAD94Z

I have no idea what a bung is man.

1redta

The bung is what the O2 sensor threads into. In reality a bung is the plug on a drum barrel and the female part of the drum is the bung hole. You can use a spark plug thread chaser for the bung hole. definitely get something to screw into them while you have them welded up so they don't get fubared