1996 Gran Prix

[russ]

Hi,

Gran Prix, 3.1 eng., 200,000 miles. When starting from a stop, the engine will not accelerate above 10-15 mph. It will do this until you depress the accelerator about half way to the floor, then it takes off like a rocket and runs fine until you slow down or come to a stop and attempt to accelerate again. At times, as I'm traveling at highway speeds, it will start to miss/jerk. This problem is very intermittent. I can put over 200 miles on with no problem then the next day it will happen right away. Drove to the cities last summer (150 miles)and it seemed the further I went the worse the spitting/jerking got. Like I said this is a very intermittent issue. Anyone have issues like this or have any idea whats going on? Thanks.

[Macgyver55]

Pretty difficult to say without seeing it first hand, but I'd say maybe a Mass air flow sensor, (or connector) possibly a map sensor or even a bad coil pack.

Any check engine light?

[Jeremy airjer W]

First thing that came to mind for me was the MAF sensor as well. About 7 years ago we ran into a tun of them that would drive fine but would fall on there face when you hit the on ramps. W

When it does it, unplug the MAF sensor and see if it improves. If it does your on the right track.