Had my car tuned over the summer. Seemed like it was running pretty good when I first got it back. Now I am having big problems with lean spikes at part throttle. If I am just cruising and hardly step on the pedal it will go lean to the point of pegging my wideband lean. Car stumbles and feels really bad. If I get a little deeper in the peddle it will clean up and be fine. I have an ms2 computer and I data logged it and between 10% and 15% tps is where it happens. I tried fattening up the fuel table and it did not help. Itís just weird how this just started happening and it has been getting worse and worse. Could my tps be going bad and causing this? Anyone have any ideas?
1992 black notchback... 347 boss block, afr 185 renegade, 80lb injectors, edelbrock rpm II, on3 7675, tko 500, 3.55 gears