Hey guys I'm back with the same problem I had before. The idle gets jumpy, and then the check engine light comes on indicating code 44, and then it eventually stalls. This problem disappeared for the winter and only seems to happen when it is over 65-70 degrees outside. I have replaced my O2 sensor yesterday and my fuel filter last fall and the same issue occurs. Any help would be greatly appreciated as I get the vette ready for summer!

 

It would appear that you are not going into closed loop. If your O2 sensor is new and good along with your harness, then your ECM or ECM connectors may be at fault. Did you perform all the troubleshooting in the GM service manual on this lean condition? If your ECM turns out to be bad, PM me.

 

I'll have to take a look at the manual when I get home in a few hours, but if it helps, this issue only really happens when I come to a stop. Thanks so much.

 

Alrighty I've taken a look at the manual and it says this

1.) O2 sensor wire - Sensor pigtail may be mispositioned and contacting the exhaust manifold.

2.) Check for an intermittent ground wire between connector and sensor.

3.) Poor ECM to engine block ground.

4.) MAF Sensor - A MAF sensor that causes the ECM to sense a lower than normal airflow will cause the system to go lean. Disconnect the MAF sensor. If the lean condition is gone then replace the MAF sensor.

5.) Vacuum leaks can cause a lean condition and/or possibly a high idle. Check for cracked hoses a bad gasket or a faulty EGR or PCV Valve.

6.) fuel pressure - system will go lean, if pressure is too low. It may be necessary to monitor fuel pressure while driving the car at various road speeds and/or loads to confirm.

7.) Clogged injector or lean injector - perform an injector balance test.

For no.2-3 what does it mean by the ground? the connections on the ecm?
For no.4 should I just disconnect the MAF and let her idle for a bit and see if the issue occurs?
Sorry to ask so many questions, just don't want to mess anything up! Thanks.

 

I have not read your other thread, but make sure your temperature sensor (not sender) for the ECM is functioning properly. It's located at the front/end of the intake and has a mushroom shaped single pin connector. This style is a known problem as far as losing connection and there is a 2 wire sensor and pigtail available to update it. This sensor is responsible for informing the computer what the coolant temperature is, the sender in the front driver's side head is for the gauges.
The intermittent ground in #2, I believe means, make sure the wire is not grounding out somewhere (shorting out, insulation on wire missing/melted and the wire is touching metal). #3 ECM grounds, this means make sure the wires that are supposed to go to ground are clean, tight and actually making a GOOD ground (for that matter, on any corvette, it's a good practice to go over ALL the grounds you can access and verify/clean/restore the connections!👍
Edit: After re-reading #2, I think this means check continuity of the ground wire to make sure it has no breakage internally....put test meter probes on each end of that particular line as far apart as possible while in continuity setting (usually the symbol that looks like a speaker and gives you audible tone when you touch the probes together) with the probes secured on each end, wiggle, twist, gently pull, etc this wire wherever you can and see if you lose connection (meter tone ringing cuts in and out)!

 

I don't know what GM Service Manual you are looking at, but the 82 corvette does NOT have a MAF sensor. So, I'm also assuming that you are using something other than the GM manual. STOP using it if you are. Instead, look at page 6E-48 in the GM service manual for the 82 corvette and follow the troubleshooting chart for a CODE 44 lean condition.

 

You're right, should've noticed that when I was looking up the manuals, the 82 has a MAP sensor not MAF. I really should invest in a physical copy of the manuals. Anyways, I found this on C3VR. Should I start with this?

 

Yes... That would be a good place to start. You would do better to procure a hard copy off of eBay. They are available and if you can get the color diagram version which is the original manual, the better. Makes it easier to follow IMO.