Armitage
Well-known member
I've been noticing a very slight hesitation in the car when I roll into the throttle from a stop under normal daily driving conditions. It only happens sometimes. Basically the car is idling and the very instant you apply any throttle, the revs dip for a fraction of a second before they start to climb again. It doesn't really affect anything but it's super annoying. Stock healthy motor, e16g turbo, 550cc injectors, MAF-T in blow-through, lightweight flywheel, b-shafts removed, keydiver chip set for A/F changes, coil-on-plug.
So first we've got the point in time right before the throttle is blipped. I had just cold started the car so it's idling fine at 1250.
.2 seconds later, 22% throttle, revs have dipped to 1219, timing has dipped as well. Injectors have fired a little more, airflow remains constant.
.2 seconds past that, I've already closed the throttle, but revs are now starting to increase.
Any ideas what's going on would be helpful. I have no idea where to start with this. I've calibrated the TPS, pressure tested the system, everything else runs great. Car makes great power, runs smooth, revs perfectly all the way through the band...
So first we've got the point in time right before the throttle is blipped. I had just cold started the car so it's idling fine at 1250.
.2 seconds later, 22% throttle, revs have dipped to 1219, timing has dipped as well. Injectors have fired a little more, airflow remains constant.
.2 seconds past that, I've already closed the throttle, but revs are now starting to increase.
Any ideas what's going on would be helpful. I have no idea where to start with this. I've calibrated the TPS, pressure tested the system, everything else runs great. Car makes great power, runs smooth, revs perfectly all the way through the band...