Code 44 - Thermactor Air System Failure.
Does anyone out there know if you will receive this code if any component in this system has failed?? Have a new smog pump, but if the Air Bypass Valve or the Air Control Valve or any of the other components is bad will it give this same code???

 

It could be a couple things. First off, check the vacuum lines going to the AM solenoids. If they're okay, then measure the resistance of each solenoid. If either is NOT 50-100 ohms, replace that solenoid. If both pass, then you need to enter into the Output State, and check to see if they're cycling. If you don't know how to do that, get some help from someone that can show you.

 

I have checked resistance on the TAB and TAD solenoids and they read out at 75.5 ohms which should indicate o.k. I am not familiar with the term AM solenoids?? Do you think this procedure for going into the OUTPUT STATE would be mentioned in a HAYNES emmission Techbook?? If not, do you know of a manual or website where I could pick up this cycling test?? I have also checked the EGR EVR solenoid and checked at 43.9 ohms. I have checked, visually as best I could, the vacuum lines, but have not checked with a vacuum pump yet.

Thanks for your advise,
guzzler96

 

TAD/TAB and AM1 & AM2 are different names for the same solenoids

Go here and scroll about 3/4's of the way down, and there is a brief description of the Output State test. Regardless of what it says, only use a voltmeter when you do it. Once you are certain you are in Output State, set the meter to the 20v scale, disconnect the two solenoids, and attach the pos test lead to the red wire at the connector for either solenoid, and the neg test lead to the other wire. Cycle each solenoid several times by opening and closing the throttle several times. Observe the meter while doing this for each solenoid. Both must cycle .5v or more each time they cycle. If they do, attach a vacuum pump to the supply port on either solenoid, and a vacuum gauge to the output port. Apply vacuum, and cycle the solenoids with the throttle. Do this for both solenoids. If either solenoid's output vacuum does not change with cycling, replace the solenoid. If both cycle properly, then test them both for internal vacuum leaks by applying 15" of vacuum to the supply port and place a gauge on the output port. Do this for both solenoids. If either leaks vacuum, replace it. If neither leak vacuum, check vacuum source for blockage or leakage from manifold to solenoids. If source is okay, check thermactor air tube for carbon blockage.

 

Thanks PKRWUD. It sounds like you know quite a bit about this. I don't exactly know when I will get to check this, maybe this weekend maybe not, but I certainly appreciate your help and I will reply back when I have more info. Hopefully I'll have it fixed when I reply back.

Thanks again,
guzzler96