My 85 TA for years has run horribly when first started. Seems to run
real rich and do a lot of idle hunting. No codes.
Using my scanner I can watch the injector pulse width increase so much
that the engine would frequently die. When it didn't die the pulse
width would decrease and the engine would purr like a kitten. Then
the pulse width goes up again and it starts stumbling again. The only
way to keep the engine running would be to constantly tickle the
throttle until the car goes into closed-loop mode (or warmed up).
Every once and I while I'd get a code 44 (low O2 voltage) when I sat
at a light for a long period of time.
While looking for a rattle under the hood I used a car stethoscope to
determine it was coming from either the A.I.R. pump bearings or the
alternator. Since my A.I.R. pump has it's own belt I took it off.
That didn't cure the rattle as it turned out to be a bolt holding the
alternator was loose.
Here's where it gets interesting. I didn't put the belt back on the
pump and when I went to start the car this morning it started and
idled great. However I got a code 34 (low MAF voltage) now. Like the
other code, it only seemed to pop up when the engine maintains a
I cleared the codes and performed a MAF check per the FSM and it says
that the MAF sensor needs to be replaced but check to insure that the
burn-off module is functioning properly.
So my questions are, could the diverter valve for the A.I.R. system be
defective and is there an easy way to check the MAF burn-off
operation. I havn't dug too far into it yet because this was just
this morning before work.