I'm hoping someone will be able to assist me and my tuner in locating the source of the issue I have been experiencing with my tune...
If I gently pull away in 1st or 2nd, at about 1,500RPM the car surges forward, often causing wheel spin....like someone put 200 shot of nos into it.
I also found out today that if when this surge happens, I take my foot completely off the accelerator the engine continues to hold that RPM (often the surge takes it to about 2800rpm) for at least 30 seconds or more even if i'm in 1st or 2nd, and would normally be expecting engine braking to slow me down pretty quickly.
The issue of the RPM's not wanting to drop can also be seen if I accelerate hard and then let complete off the gas. If I get beyond about 4500rpm the engine just wants to keep going even though I'm in a low gear. Its put me in a couple of dangerous scenarios where I was expecting engine braking, but instead had to fight the engine with the brakes.
Attached is a short log showing the issue.
I'm beginning to wish this car just had a carburetor!
tune11-a-61621.hpl