I have an '87 Chevy K5 Blazer, 350, TBI that I love. I came to this forum because I read some threads that Eagle and dave w have posted in the past.My dilemma is that I have a gremlin in the 'system' which I can't find and have done pretty much everything that has been suggested. It is a code '43' error in the OBD1 but the symptom is a hesitation/shutter mainly and infrequently upon stopping and then WOT/stomping on it. Occasionally, it just does it when hot and when I sit at a light then it will stutter upon normal gas. I think that the timing is being retarded but have no proof of that.I have done a lot of work on the vehicle and don't want it to turn into a lemon but the problem is not only annoying but kinda unsafe driving.http://www.gearhead-efi.com/Fuel-Inj...ies/mad.gifAny help would be nice, I have already reached out to dave w and we are discussing his suggestions. But it would be nice to hear from the Community.Thank you. Sincerely, JB http://www.gearhead-efi.com/Fuel-Inj.../rock%20on.gifQuestion - Could I add a picture of my baby to this post?