My car has similar problems, I'll need to follow this to see the outcome

 

My car ran perfectly for the mechanic. While I drove my buddy home and then myself home, it ran perfectly. The mechanic couldn't tell me what was wrong. This obviously was an intricate and painfully detailed plan by my car to give me the most infuriating April fools joke ever.

 

I've had some time to hook the scanmaster back up and drive around a little. LBL is down around 115 and rBL is around 108. The O2 readings vary like they should most of of the time. Sometimes they will stay high and vary between 700-900 or they will stay low, between 100-300. After a few seconds they go back to normal. When the car entered closed loop after I started it, there was a noticeable change in the exhaust note, like someone wrapped some insulation around the pipes.

The mechanic did nothing. He plugged in his diagnostic tool and let it run, then drove it up and down the block a few times. The car performed normally. Does anyone have any suggestions on what to check? If it is wiring, would I have to scan the length of each wire in the harness? Check all the plugs and the sensors they plug into? The 3 grounds I checked weren't loose or rusty or anything.

 

I've been helping people with problems like this for 10 years. I've never seen one where the BLM's would change from 108 one day, to 160 the next and move from one extreme to the other over a relatively short period of time. Are you quoting the BLM's for the same Cell each time? Which Cell? Did you use O2 harness extensions when you installed the headers? Are you sure you didn't crush any harness components when you did the A4->M6 swap?

 

Everything was done while idling. There was the one occasion I mentioned where I drove it a short distance to a shop and the BLM's had switched. I only remember seeing cel 18 on the drive to the shop. I don't have a laptop to scan while I drive so I'm gonna call a couple of friends.

I don't have O2 extension wires. The passenger side connects without tension in the line, the drivers side is a stretch.

I'm not sure if anything was/is pinched or damaged due to the tranny conversion. Where would I look? What would I look at?

I drove it to work today hoping it would throw an SES light or something and it didn't. The BLM's were low, LBL around 114, rBL around 109. The O2's were varying for the most part but sometimes would stay high between 800-900 or low between 000-300. I noticed the O2L fell to 003 again and stayed for a second then resumed its normal variance. The car didn't hiccup at any point. I don't smell exhaust anymore.

I wish this thing would work like it's supposed to or break and stay broken.

 

Hey, I realise this issue u had with the code 44 was over a decade ago but I'm having all of the SAME issues with my car and would GREATLY APPRECIATE to know how u resolved the issue?? I am STUMPED! It is definitely frustrating. Thank you very much in advance!!

 

Might want to try an email or Private Message. “AdsoYo” hasn’t signed in to this site since 2018. Click on screen name, options in the drop-down.

 

Thanks, I appreciate that. I'm new here and have never used forums before actually.