what are the possibilities?

[x99suplarax]

okay.. so i have had this problem for some time but it wasnt a big problem.. till now that every time i am at a complete stop.. my idle starts to drop to 600rpm and tries to go lower than 500rpm(but doesnt go any further).. so my car shakes and fights to stay alive..

so i am asking what are the possibilties of why this is happening? i searched but my key words suck when searching and when i do search it gives me either up to date posts or way way old ones that not even close what i am looking for.. please help me?

list of mods i have...

cpe
obx headers
megan drift spec
magnecore wires
ngk plugs
hid's


have changed:
battery
alternator
o2 sensors(both)
knock sensors (both)

[MisterTedster]

How's your gas mileage?

[x99suplarax]

^^full tank lasts about 5 days.. 5o miles to work and home every day

[99BlackSandv6]

To clarify is that 50 each way?

Do you have an O2 simulator or cat. installed with the OBX?
If not, that's probably an issue.

Also, any CEL?

[ASG14]

I'd clean the IAC valve.

[99BlackSandv6]

+1 If the only issue is low idle, IAC is most likely.

[x99suplarax]

yeah its pretty much 25 miles to work and 25 back home.. also i have o2 sims for front and back for the obx that i have..

thanks for the input guys.. cleaning the IAC is gonn be on my to do list this weekend

[trd4life]

you should only be using 1 02 simulator for the post cat sensor.

[x99suplarax]

really? hmm.. is it bad to use 2?

[Dawgz]

clean IAC....


check your o2 / af plugs.

[99BlackSandv6]

If you're burning through a tank in only 250mi. you have more problems than just the IAC valve. It should be more like 400.

[x99suplarax]

lol i also do errands.. i would like to say i get 300 miles.. now lets say that i do get lower than 300 what could be the problem?

also having headers, kills gas milige right..
lol stomping on the gas once or twice or three or four times a week doenst help either haha..

i already changed o2 sensors.. i do 3k maintances(oil and spark plugs)

[99BlackSandv6]

If you refill at about a quarter tank, your milage is alright.
I drive my car hard pretty much all the time, and still average
about 22mpg. So next time you fill up, you should reset your
trip meter, then after you fill up again, record the mileage and
the gallons it took to fill up (from full tank, to full tank).
That's the only way to accurately gauge the milage your getting.
Just divide the miles driven, by the gallons consumed.

Having headers will not kill gas milage.

[MisterTedster]

I'm thinking dirty injectors, which was why I asked about the gas mileage

[sarki]

I think its your flux capacitor. Have it looked at.