my 85 t/a 305 tpi has been putting out a code 44 intermittently my haynes manual says it could be bad fuel injector(s), low fuel pressure, defective maf sensor, defective o2 sensor or defective ecm (which i just replaced), i have pretty much ruled out a vacuum leak as i cant hear or see one which of these is the most likely cause of my problem? the idle fluctuates and sometimes at a stop in gear it will choke the engine

 

have you tried these yet???

44 ECM idle switch circuit open
44Oxygen sensor or circuit - lean exhaust

 

I have only eliminated Electrical connections vacuum leaks and ECM as possibilities I simply wanted to see if anybody had an idea of what is most likely before I spend alot of money throwing parts at it I only make minimum wage and every dollar counts all help is appreciated
thanks

 

i understand exactly wat u mean bout making min wage and evry dollar counts. and no problem.

 

I have changed the fuel filter and tested the injectors also. I am going to change the oxygen sensor b/c I got it when I changed the alt. With the core charge the sensor was free if not that then maybe egr valve is next
thanks for all your help

 

sounds lik a plan and as long as u hav 1,thats wat matters. and no problem at all.

 

Did the new oxygen sensor help?

 

you need to get a hold of a gm diagnostic diagram... or something like mitchell diagnostics... or you can google the various steps to diagnose each of those possibilities...

 

I just want to add when the alternator is bad and the battery drains while driving, a code 44 will be displayed because of lack of power to spark and fuel pressure. A charged battery and computer reset will fix this problem is most cases. happened last night to me

 

i have a 90 camaro 3.1 v6 and im getting the code 44 as well but i put in a new alternator and realized the battery is like dead im replacing it on thursday but do you think the battery would be the problem because i just replaced pretty much every sensor other than the o2

 

What ended up being the problem?

 

sorry for the late response, been busy but it was the o2 sensor fixed it good. havent had a spectacular experience with that motor so im gunna swap it out for my brothers rebuilt and built up 305