I own a 88 trans am 305 TBI and Every so often when i started the car it would run really low on the rpm. so i decide to reset the timing. I read you have to unplug the est wire. so i thought i was doing thatbut i was unpluging a different wire. Its a single wire right above the heter core mini radiator right on the fire wall passenger side. My question is when i do the timing again so I unplug that as well as the est wire( i just figured out where it is yesterday) or just unplug the est wire.
Let me know you f-body experts out there!!

 

I have an 87 and I've set the timing quite a few times. Only unplug the EST wire when setting time. Make sure car is warm. After setting time, tighten down distributor and re-check before plugging EST back together.Not too hard!

 

ok i also think i have a bad connection cause i get code 42 and i cants see any phisical problem unless i have a bad dist modual
but thanx for the advise