So, it's been about a half year since I've had this vehicle, and much work and improvement has been made to my 01 Expy. The fuel trims are decent; around +5 to +7% LTFT on both banks. No codes.
However, there's this one issue that I still have.. My vehicle jerks on acceleration (from 0 mph) while the engine is cold. This happens only on take off. I'll press on the gas, and the RPM's will go up, but nothing will happen for a couple seconds, then suddenly I get this "jerk" forward. So the only time this happens is when the engine is cold, and when I first take off. This issue doesn't appear in any other instance. This doesn't happen at all once the engine is warmed up. What could this be?
However, there's this one issue that I still have.. My vehicle jerks on acceleration (from 0 mph) while the engine is cold. This happens only on take off. I'll press on the gas, and the RPM's will go up, but nothing will happen for a couple seconds, then suddenly I get this "jerk" forward. So the only time this happens is when the engine is cold, and when I first take off. This issue doesn't appear in any other instance. This doesn't happen at all once the engine is warmed up. What could this be?