Problem With TAD/TAB Solenoids Codes 81/82. PLEASE HELP.

91FoxVee8 · Oct 2, 2021

So I have codes 81 and 82 and it is a problem with the TAD/TAB solenoids from what I understand. I jut purchased new ones and cleared the codes ran the car and they came back. What else could this be and how can i troubleshoot this? I found another article that mentions testing the voltage at the red wire i did that and it is 12v like it should be so im kind of at a loss. I do not know a lot about this system so please dumb it down like youre talking to a kid i wont be offended it will be beneficial to me Thanks.

Mustang5L5 · Oct 2, 2021

What are the actual codes you are getting?

Are they plumbed correctly in terms of the vac lines connected to the two valves coming off the air pump? Are they connected to the correct valves and do they work so that the ECU is detecting a change via the o2 sensors?

91FoxVee8 · Oct 2, 2021

This is on my 87 BTW not my 91.. I am getting Codes 81 O - Air Management 2 (AM2) circuit failure and 82 O - Air Management 1 (AM1) circuit failure

All the vacuum lines that i can see are connected correctly. 2 yellow lines to the TAB and 2 yellow lines to the TAD i traced them back and are plugged in.

im sorry how do i tell if its connected to the valves? also how do i see if the ECU is detecting the changes?

I do not have CATS by the way but i do have 02s

91FoxVee8 · Oct 2, 2021

wait a min mine was speed density but i switched to MAF conversion is this normal to have this CEL then?

Boostedpimp · Oct 2, 2021

91FoxVee8 said:
wait a min mine was speed density but i switched to MAF conversion is this normal to have this CEL then?

No that doesn't have anything to do with the TAD and TAB

I would double check to make sure they are connected to the right valves

91FoxVee8 · Oct 2, 2021

Boostedpimp said:
No that doesn't have anything to do with the TAD and TAB

I would double check to make sure they are connected to the right valves

ok someone on forums said only speed density cars use those so i was confused. I will disregard it. THANK YOU for the diagram i will check in the morning and get back to you i appreciate the help. Been chasing this down forever

Boostedpimp · Oct 3, 2021

91FoxVee8 said:
ok someone on forums said only speed density cars use those so i was confused. I will disregard it. THANK YOU for the diagram i will check in the morning and get back to you i appreciate the help. Been chasing this down forever

Good luck and that isn't true. They are not only for speed density cars

Mustang5L5 · Oct 3, 2021

If you do not have cats, what is your motivation for repairing this circuit?

They are no longer needed if your cats are gone. The code 81/82 are soft codes that wouldn’t normally display the CEL light (but 87s don’t have one anyway) and does not affect how the engine runs or the ECU tune.

91FoxVee8 · Oct 3, 2021

OK i did not know that. Thank you i wont even worry about it i figured it was hurting performance either gas mpg or idle speed. I have been chasing down an issue. When i start my car sometimes it dies a couple times then starts and runs from then on. sometimes it just idles at 1500rpm then falls down and idles correctly. I just want it to run smoothly. I replaced fuel filter i fixed all the vacuum leaks i could find and its still doing it. Thought maybe the fuel pump but the fuel pump turns on when i hit the key. i guess it still probably could be the pump. I just want the car to start up and not die cause it sounds like junk when it does and its embarassing lol

Mustang5L5 · Oct 3, 2021

You might still have a vac leak. These cars are notorious for it. You might want to build a smoke machine and do a smoke test to really be sure you’ve captured every vac leak

91FoxVee8 · Oct 3, 2021

Mustang5L5 said:
You might still have a vac leak. These cars are notorious for it. You might want to build a smoke machine and do a smoke test to really be sure you’ve captured every vac leak

ok i will do that. i only found one under intake manifold rubber vacuum cap was blown out its prolly best to do it this way thank you ffor the info. Willl update.

Problem With TAD/TAB Solenoids Codes 81/82. PLEASE HELP.

91FoxVee8

New Member

Mustang5L5

That is…until I whipped out my Bissell

91FoxVee8

New Member

91FoxVee8

New Member

Boostedpimp

Attachments

91FoxVee8

New Member

Boostedpimp

Mustang5L5

That is…until I whipped out my Bissell

91FoxVee8

New Member

Mustang5L5

That is…until I whipped out my Bissell

91FoxVee8

New Member

Similar threads

Problem With TAD/TAB Solenoids Codes 81/82. PLEASE HELP.

New Member

That is…until I whipped out my Bissell

New Member

New Member

Attachments

New Member

That is…until I whipped out my Bissell

New Member

That is…until I whipped out my Bissell

New Member

Similar threads

Privacy & Transparency

Privacy & Transparency