i too have a 71 code.. but idon't have the problems you are describing.. which makes me think your egr valve is bad..

on my truck when i went to get it smogged.. i was high on NOx .. i guess so the tech told me.. on toyotas the EGR recirculator goes bad.. its that little black round deal clipped near the EGR at the front of the motor.. on a V6

i'm going to replace that and see if it cancels the CE light

good luck


89 4runner V6 33 MT/R GoodYear,the only way to go. open front and e-locker rear.4:88....Truck's needs are deeper than my wallet. so i got another truck <img src="/forums/images/graemlins/smile.gif" alt="" /> 85 4R I6 T 35 TRD rear dual case 4.56 lets go wheeling :P