Join Date: Mar 2002
Location: Austin, TX, USA
If it is a Mass Aif Flow engine, look for vacuum leaks. In particular, the rubber ducting between the MAF and throttle body are good places for leaks to develop. If it is a speed density or Manifold Absolute Pressure system, check the Throttle Position Sensor and associated connectors / wiring.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI