codes came back on!!! i changed the plugs and cleaned the maf with crc maf cleaner.

i threw p0171 and p0300 i think p0171 is running lean and p0300 is misfire

the stock plugs that were in there... idk maybe bad. the (goin from left to right) cylinder 1 gap was .040/.041, 2 gap was .043, 3 gap was .040, 4 was .042 and 1 was dark with a grey tip, 2 and 3 were all grey and 4 was also dark with a grey tip

and help on what may be causing the code other than the coil pack???

and i am a 2.2L btw

on this website i found this but nothing about the p0300

http://www.carcomplaints.com/Chevrol...006/tsbs.shtml


# TSB #060604033 -- ENGINE MALFUNCTION INDICATOR LAMP (MIL)/SERVICE ENGINE SOON (SES) LAMP ILLUMINATED WITH DTC P0171. *KB (NHTSA ID #10020838, JUNE 01 2006)


anyone with any help???

 

have trhe dealer fix it?

 

replace your plugs with stock plugs, unplug the battery for about 15 minutes and then plug it back in start her up and drive around a bit. the CEL should be off.

 

dealer will fix the misfire code,but they will never fix the p0171 code..ive had that code for 4 months now,and cars been in and out of dealer atleast 6 times,and i just got tired of it and found someone with hp tuners to kill that code(tx matt)

 

how much will it cost for dealer to clear the code? and what can cause the p0171?

and i have the stock plugs in it. thats what i just changed out with the new stock plugs

 

yet again failed emissions for the damn cel... p0171 lean n i think the p0300 misfire is gone but i was just wondering..... If i put my stock ss/sc injectors in will that make me run richer or leaner????

anybody know? need some info so i can pass emissions

and i get like random stalls lately and its mostly when i go to pull out. if it drops below about 800 rpms it dies then i cant get it to start again for quite a few minutes. happened twice today....!!!!!!!

 

I just posted in another thread like this.

Most common cause: If you have an aftermarket intake pipe its probably too large of a diameter compared to the stock size. A mass airflow sensor measures airmass by sampling a percentage of air passed by it in the intake pipe. If the diameter is changed, the sample percentage is also changed, therefor the amount of air the PCM thinks is being ingested into the engine is incorrect. The PCM realizes this via the oxygen sensor and makes a correction. When the correction exceeds 20% you get the code.

If a dealer or mechnic is diagnosing an actual lean condition take it somewhere else. The code is indicating that the PCM is having to vary its fueling amounts more than it should have to.

Fix: Recalibrate the PCM for the change in intake pipe diameter (probably not possible for your 2.2L PCM) or change the intake pipe back to stock.

 

stock intake and stock everything in sense of intake and fuel as of now.... got the code from the local state inspection place and havent gotten around to gettin it to the dealer yet... will soon


im a senior member finally! lol

 

would maybe the intake mod (removing the box from the wheel well) throw the lean code???

 

here's the thing..the stock air box isnt really getting enough air down where its originatly at,so for u to get enough air for the maf to read it,u have to some how create a diffuser that will make air hit the maf sensor and that will clear ur code...ur not loosing any power or anything..its just that the sensor isnt reading the right amount of air goin into the motor,but its actually goin around the sensor

another option is the AEM intake that comes with the pipe and filter will fix this problem..it fixed it for me,and as soon as i took it off cel came back on

 

or does anyone know if a dealer would be able to clear these codes so they wont come back or if i cleared them with a scanner would they not come back????


please someone with advice

i am a 2.2l tho
i guess what ur saying is that the maf is reading less air than is coming thru which tells the ecu not as much fuel is needed and then the o2 sensor is telling me that i have too much air in the mixture??? that what ur saying?

 

yup...u have to have them work together...thats why create some sort of flap or something that will direct air INTO the MAF and read "actual air"comin in and not around it

 

ok thanks.

and do u know anything bout the p0171 misfire code?

i have stock plugs and stock intake

 

p0171 is the lean code,and thats wat u explained on how to fix it above...

other code is prolly plugs,or maybe ur plug wires might be takin a crap

 

oh yea... duh.. p0300 is misfire. i just put new acdelco stock plugs in. and may it be the coil pack or maybe wiring going to it?

 

here's a crazy way to test it..find a highway and gun it...if car starts to misfire,its ur plugs or wires...my car misfired around 120mph and once i got the stockers back in car never misfired again and code was cleared

 

Pay someone 100 bucks and have them disable the codes with HpTuners. The emissions scanner wont pick it up. Also when you clear the codes you can not get smogged right away. The smog machine knows and will say the obd2 is unreadable.

 

cant use hpt. im a 2.2 and i already had the prob with changing plugs puttin stock intake back on n clearing the code n it not reading on machine but it has come back

help?

 

the random misfire is probably going to have to be diagnosed. But chances are it's either related to your lean problem(via maf sensor) or it could be your ckp sensor. There's other possibilities but that's the one I would look at. Might be a good idea to check your fuel pressure as well.

If your intake is stock then it might not even be a problem with the maf sensor. Looks to me like you've had a good amount of motor work done. Possibly your intake is leaking? Leaking tb gasket? Cracked intake manifold?

 

Witt - i installed a 3" JBody Performance intake and i'm now getting the P0171 lean code as well. What changes do i need to make to the PCM? If I were to hook up a scanner where in there would I make the change? Is there a pipe diameter variable that i can chagne from whatever stock was to 3"? I'm a novice in this area so play nice. Thanks!

 

Everywhere ive looked, P0171 was rich..not lean.

Sorry, I lied. its P0172 thats rich.