Hi there. Sorry it took me so long to reply. OK, so I took my car back to the mechanic to have him check for a vacuum leak. What he thought might have been it really wasn't because he had never removed it, but based on my telling him what I was hearing, he figured it was some hose to the intake manifold, but it wasn't.
What I am hearing now is noticeable but faint whining/whizzing sound coming from the engine compartment. I know it's normal for my car to whine or whiz a little a bit upon acceleration, but this starts as soon as I start the car and is consistant.
As I'm driving the car, I have been feeling like the transmission holds it's gear too long, like it doesn't want to shift to the next gear. It's almost like the engine and transmission are not communicating with each other in order to down shift and upshift at certain speeds and/or rpm. At the same time, I feel a tight gas pedal and a tight break pedal (there is hardly any play in the break pedal at all). I know the gas pedal is controlled by a "drive-by-wire" system and it shouldn't be affected by what I am feeling at all, but get this. When I pump the gas pedal repeatedly in park, and then put the car in drive and step on the gas, the gas pedal feels lighter and more responsive. But, as I drive the car, the pedals will go back to feeling tight again after just a few minutes worth of driving.
In addition to the above, I am experiencing the gear change and shifting issues. From a dead stop (1st gear), I accelerate and gain speed and can hear and feel the car shift into 2nd gear, and then to 3rd gear. But, by the time I reach 4th gear the RPM drops to 2000rpm and the car feels as if its struggling to accelerate past that. Then from 4th to 5th, I cannot hear nor feel the car go into that transition. And when I take my foot of the gas pedal, the rpm drops to about 950rpm and then rises back to between 1000 and 1200 rpm. Is this a transmission problem? Or, can it still maybe be a vacuum problem that affects the way the engine sends a signal to the transmission to shift or slow down? I've been having this issue for 4 months now, and nobody can seem to figure this one out. Oh, by the way, I had a firmware flash that was supposed to be proactive to save the secondary shaft bearing on the tranny to go out if if you shift from D to R over and over again to get out of snow, if you live in an area where you would need to do this.
Wednesday, October 12th, 2011 AT 5:16 PM