IAC Motor buzzes when trying to read codes - Third Generation F-Body Message Boards

fitzy · 07-30-2009, 10:28 PM

I'm trying to sort out an intermitent code 33 problem on my 400 motor

installed in an 81 stepside 4x4

The TPI was installed using all new sensors and a Painless wiring harness.

I bought the truck with the TPI installed and it came with the code 33

issue.

Tonight while reading the codes by shorting out terminal A-B I noticed

that the IAC motor makes a buzzing sound.

Is this normal or could this be part of the problem.

Thanks, Fitzy

fitzy · 08-01-2009, 06:12 PM

Can any one help with this one? Just trying to figure out if it's normal to hear the IAC Motor clicking when you short out a-b to read the codes.
Thanks, Fitzy

NY87Iroc · 08-01-2009, 08:44 PM

Pretty sure its normal...mine does it anyway

1tpi · 08-02-2009, 05:24 PM

Yes it's normal
it's the way you set your min idle to
close the iac

fitzy · 08-02-2009, 08:30 PM

Thanks,
I'll do a search and see what info I can find on the code 33.
It looks like some others on this site have had a tough time with this code also.