heres my list:

gm stage 1
gm stage 2 pulley and belt
NGK BKR7E copper plugs .042 gap (one step colder)
K&N intake
TTR engine mount
i always run 93 from Shell, good stuff.

Problem:

checked the spark plugs and the ground prongs are all white as snow and even rainbow colored in a few spots. from my years as a nitrous junkie, i take that as a sign of very lean a/f and high cylinder temps. the car feels slow. it struggles to reach 15psi and at times wont go past 13psi. it lags on teh bottom end and just doesnt feel like the other stage 2 cobalts i have driven. i have been told by everyone here that the stage 1 ecu tune is the same as the stage 2 ecu tune. however i really have begun to doubt this.

Question:

Am i leaning out and about to detonate the **** out of this engine?
If so, what can i do to remedy this?

 

Get a wideband and find out for sure.

 

so you basically have a stage 2, but you're tuned for stag 1?

 

yes, but i was told by almost everyone that its the same tune, and i have seen many others on this forum do the same thing, even with smaller pulleys.

i dont have access to a wideband... i wish i did

 

stage is a tune to compensate for the larger fuel injectors not the smaller pulley....Stage 2 tune compensates for the pulley and the injectors so idk where you got your info from but theres a reason why your lean...sorry to hear though bro

 

it is the same tune.

GM uses the same tune for stage 1, 2 and 3... but 3 you get to switch to a higher octane map as an additional option.

i'm not sure what year your car is, but the tune for 2007 is really rich... so i don't know what your problem is. if stage 2 is all you have on your car, take it in and get it fixed for free!

 

lol what? EEEEHHHHHH WRONG!

Stage 1 and Stage 2 have the exact same tune. There is no compensation for the larger pulley, thats what the PCM does. It calculates how much fuel is needed based on air intake. There is no programing required. And stage 1 comes with injectors, not stage 2.

Get a dyno run from a local dyno shop, will prolly cost around 50 bucks or so. They can hook up a wideband and let you know whats going on.

 

um, stage 2. if you buy it directly and skip the stage one. you get the injectors as well.

 

lol if you could read i did say stage 1 comes with the fuel injectors and stage 2 is the smaller pulley i just thought the tune was changed to compensate for either the injectors or both the pulley and the injectors

 

The white has nothing to do with running lean. Lean Causes the prongs to round out along with predetonation. The discoloration is more of an issue. Two things to remember:

1) A light white with metal still visible along with the prong intergrity (still square) is a good sign.

2) Your motor will always run extremely hot...it is a two liter pushing close to 250 hp...what do you expect?

SO....the discoloration I would worry about...the slight white...not a big deal.

 

anyone wanna post their reflash part number from their stage 2 papers so i can see if its the same? ****** dealership wont do the stage 2 calibration unless i have the papers to prove i bought an actual stage 2 kit and i only have the papers for stage 1...

i would throw it on the dyno and W/B but there isnt a shop with a dyno within 100 miles of where i live.

im really kicking myself in the ass right now for being cheap.

 

try running one more stage cooler plug if your concerned about a lean issue.
but yes a wide band would be ideal to see what your car is really dooing.

 

EHHHHHHHH wrong.

 

geez... for the love of cobalts will everyone please stop bickering about injectors. i need to find someone wiht hptuners. anyone in north east ohio / northwest pennsylvania with hptuners who knows what they are doing please contact me.

 

Hey man i would go back to the factory plug size see if that helps any it show you have air intake and stage 2 i mean if you had exhaust or what not i would go 1 step colder but go back to stock plugs cause it does not say anywhere you need to drope to a colder plug with stage 2 with only a intake and stage 2 i would stay with factory plugs

 

omfg, ok, people are confused.

most people think that GM stage 2 is a reflash, pulley, hub, injectors, & belt, but that's not true.

you have GM stage 1 which is the 42.5# injectors & a reflash
you have Stage 2, which is the Hub, pulley & belt

and you have GM stage 1 & 2 which is everything together.

People didn't want to type GM stage 1 & 2, so instead they called it stage 2.

Stage 2 is also known as the Stage 1 to 2 conversion. so you can see why people get confused.

 

i have a 05 cobalt ss 2.0l and it is all stock and runs really rich what can i do to make it leaner? add an air intake? and sorry to hear about the car running chttps://www.cobaltss.net/forums//images/smilies/cussing.gif
rappier

 

You dont wanna make it run leaner these LSJ engines are made to run rich that is why this guy is ask how to run richer cause he is running lean

 

Here.
Quoted Directly from Crate Engine Depot

STAGE 1
STAGE 2
STAGE 1 To 2 CONVERSION

can we stop making things up please?

 

it bugs me because it gets all over my back bumper

i am looking at getting a stage 1 kit will that help?

 

Well stage 1 comes with high flow injectors which causes more fuel use so no but if you get a cold air intake it will lean it out just a little bit do you have an exhaust cat back?

 

a clogged fuel filter could effect fuel delivery. It can be often overlooked. I had a fuel pump die on me due to a clogged filter. ever since, I change mine every year on all vehicles I have ever owned.

 

all i know is that injectors come in both one and two so i dont know your point

 

Not if you get stage 1 then buy stage 2 cause with it come a belt hub and pulley lol omfg lets stop with this already go to a damn site and look it up

 

if you buy the stage 1 to stage 2 upgrade then no you dont get injectros, but if you buy stage 2 , then you already have stage 1 and you get the injectrors with stage 1