code 33
 

Hello, I have a 85 corvette that’s is driving me nuts I’m getting a code 33 I replaced the MAF the first time around and it fixed it for about a week then the problem came back so I figured I got a defective MAF had it exchanged still the same problem. I cleaned all the connections went through the Mitchell trouble tree all voltages are correct I can monitor the MAF signal with my snap-on scanner everything seems ok then I will hear what sounds like the idle air or something open (I can hear a deference in the air flow). That’s when it starts running really rich and throws the code 33 so I’m thinking the MAF is actually reading correctly the tps is good there is no voltage change there when this occurs but the air flow signal sky rockets I’m lost at this point and would really appreciate any suggestions thanks for your help, will