Hi, just got my first tpi car coming from a 305tbi, it's a 1988 formula 350 have been driving it alot lately but recently have been having a few issues, will run really good but then out of the blue the engine light comes on and it starts to lose power, hesitate and sometimes surge then sometimes it will stalls but starts right back up and runs fine then a couple miles later it will do it again, but sometimes I'll go the whole day with out any problems.. the codes I'm getting are 33 and 22, stating that the maf voltage is too low and the tps voltage is to high.. Could it be the sensors are bad? Or maybe a faulty ecm? I know nothing about tpis so I have no idea where to began.. So any help would be great!

 

http://chevythunder.com/maf_code_33.htm
http://chevythunder.com/tps_code_22.htm
http://chevythunder.com/fuel%20injec...%20pinouts.htm

Here's a ton of info. Start troubleshooting

 

After going through all that found out it was an cracked vacuum line... Now she's running like a champ!! That's definitely some good info tho for future reference