service engine codes

[jeff d]

i just used a paper clip to get the codes out of my computer on a stock 86 gn i came up with codes 31 and 34 the light only comes on after i have stepped on it and let off the gas then resets when i shut car off any ideas where to start before i have to replace expensive parts thanx

 

[MeanBuicks]

Start here:

http://www.gnttype.org/maint/malf.html

You should always verify your wiring before condemning sensors; esp. the MAF.