This is getting old but...code 44 problem persists

[d0n_3d]

OK here we go again...I am still trying to figure out what is causing my code 44 at idle all the time. To recap if you haven't seen my other 3 threads on this...I start the car up...blm number is PEGGED at 150 and doesn't move at all until you start cruising then it's in the 135-145 range

integrator number is always jumping from 135-150 at idle and same during cruise...

o2 mv numbers at idle are always ranging from 120-250 but most of the time it's stuck in the 120-150 range at idle...then it ranges from 300-800 or something during cruise, it's all over the place...

o2 cross counts at idle are ZERO...i never see cross counts during idle...only at cruise and it's in the 20-40 range

IAC number is from 35-40 at idle
TPS number is at .42 at idle

maf sensor is reading 6-5 GPS at idle (ls1 sensor and translator)

down at the bottom it says Learn Cntl - On and it's always on until i start crusing...what does that mean? i reset my computer a long time ago and shouldn't be learning anything now

engine rpm at idle in closed loop ranges from 850-950...

i hooked up a vacuum gauge and tested various vacuum lines...fpr line tests at 22 hg, charcoal canister registers 20-22 hg, pcv valve vacuum line reads 20-22 hg, also ran the car with just the pcv and then ran with pcv and inline check valve, still get same numbers...

i don't think i have vacuum leaks anywhere...i spray carb cleaner around the throttle body and intake area and idle doesn't change...i will double check for exhaust leaks but i replaced my crack ds header with a new poston's header...pass header looks fine and no cracks...crossover looks fine and connected and no leaks...but again i will crawl underneath and check again...

my car has been doing this for 2 years now and i was stock back then...i have changed many many many parts since then and still have the same problem...is this problem internal? i have tried numerous chips, changed to brand new 50 lb fuel injectors, changed o2 sensor NUMEROUS times...running a new GNX sensor right now...doesn't matter what sensor i put in there...all the grounds test ok and i am just lost...

 

[d0n_3d]

also forgot to mention that whenever i cold start my car...rpms jump way up to 2000 rpms then gradually come back down to 1000 rpms then all of a sudden it idles really low and then dies...i have to keep giving it gas when i first start up the car...after a minute and the coolant temp gets higher then it idles without my foot in the gas...but when i first start it up after letting it sit for a couple hours, forget about it...

 

[gofstbuick]

Flow some propane through the air induction prior to the MAF. Does the O2 reading go above 450mv and flat line above 850mv? It should.

 

[jastrckl]

here

and


here

 

[d0n_3d]

Originally posted by jastrckl
here

and


here

i have already been through those procedures numerous times...

i just swapped out the coil pack with a new one...still same crap...i don't understand...this is starting to tick me off...car runs so rich you can smell it a mile away...even my friend that drove his car following me said he could smell the rich exhaust big time...i don't know what else there is to look at...this is crazy...my o2 reads like it's dead at idle but then comes to life when i cruise...why why why

 

[d0n_3d]

also if i had any kind of header crack or crossover pipe crack or something like that wouldn't my boost be affected? when my ds header cracked i couldn't boost past 5 lbs...i can boost up to 22-25 lbs in 1st gear and hold it all the way up till i shut down right now...like i said my car is not affected performance wise but it runs like complete crap at idle!!! this is driving me nuts

 

[gofstbuick]

Originally posted by d0n_3d


o2 mv numbers at idle are always ranging from 120-250 but most of the time it's stuck in the 120-150 range at idle...then it ranges from 300-800 or something during cruise, it's all over the place...

It smells rich, because your computer is seeing lean at the O2, and trying to compensate for the lean condition. Try flowing some propane into the induction system prior to the MAF and see if the readings settle at idle.

 

[d0n_3d]

Re: Re: This is getting old but...code 44 problem persists

Originally posted by gofstbuick
It smells rich, because your computer is seeing lean at the O2, and trying to compensate for the lean condition. Try flowing some propane into the induction system prior to the MAF and see if the readings settle at idle.

what exactly does this do? why do you run propane before the maf sensor? won't it ruin it?

 

[gofstbuick]

Propane is a fuel, with a very very low boiling point. So when it is introduced before the MAF, it will be gaseous. So it shouldn't hurt your MAF. I have used this procedure many times when testing my O2 (with a digital storage oscilloscope). But your not looking at response time of the O2, you just want to know if it will react at all (at idle). Now, since propane is a fuel, when you introduce it into the induction system, is should create a rich condition that the O2 sensor should recognize. Consequently, the O2 reading should rise above 450mv and flatline above 850mv. If not, your O2 may be dead or biased lean.

 

[gofstbuick]

The other problem you may have is a lean misfire condition at idle. Do you have access to a emissions analyzer so you can see the readings?

 

[d0n_3d]

well i just put in a brand new coil pack unit...didn't solve the problem so it's not ignition related...i guess i will try the propane idea...can't hurt

 

[NC87GN]

Are you running a translator chip with your translator setup? If you ARE then I see a problem. If not nevermind. Also something is going on with 02 cc. Did you try swapping an ECM? Idle seems pretty high at 900 but I'm not sure what your program idle in the chip is.. What kind of chip is in the car now? I've seen some chips peg 150 BLM's and go to 128 as soon as your on the gas. Share some more info like DS files or type of chip..

Mike Banas
87GN

 

[gofstbuick]

This isn't a permanent fix, just a way to find out if the sensor responds to fuel. Also, a lean misfire could be cause by other things besides ignition issues. Usually a lack of fuel, compression or vacuum leak could cause a lean misfire. Because of the lack of fuel, the mixture is not fired, so the excess fuel and air exit the combustion chamber and when the O2 sensor sees air (essentially O2) it thinks lean and drives the injectors rich and if there still is not enough fuel, it geos into an uncontrolled lean misfire.

 

[d0n_3d]

type of chip is a jim testa alky chip with 22 degree timing...this has been a problem even with stock injectors and chips...i also had a PTE 93 chip for these 50's...same thing...even does it on race chips...

i have an extender chip coming in pretty soon...that will not cure my problem though...it's not chip related...i have not swapped out ecms yet...but getting there eventually!