choppy acceleration = bad speed sensor?

[jsomogyi]

My acceleration is choppy sometimes, especially under heavy accel. The check engine light came on one day after hard acceleration , and the problem has persisted ever since. The mechanic gave me the following codes . Being firestone though, they couldnt really tell me much about the problem.

code 28 overheat

14 speed sensor

31 electronic controle module

21 - ignition coil

. Do you think that just replacing the speed sensor should do the trick? What do you think is happening? Note, the car has 230k miles.

[240dx]

the speed sensor shouldnt have anything to do with it.
my guess is take a look at your ignition coil. sounds like it may be misfiring.
also whens the last time you did a basic tune up?

[jsomogyi]

the speed sensor shouldnt have anything to do with it.
my guess is take a look at your ignition coil. sounds like it may be misfiring.
also whens the last time you did a basic tune up?

Im not sure . Thanks for your help.

[Space Monkey]

240dx wrote:the speed sensor shouldnt have anything to do with it.

I think he he right. The speed sensor is for your speedometer only i think.

Check you spark plugs, distributor, ignition and injectors.

[poshatch]

my friends s14 is doing this at the moment too i think...its like perfect up until 2.25 or 2.5 rpm and then it starts shaking violently like the whole car like its accelerating and decelerating like every half a second, im not sure what it could be i thought it could be his knock sensor malfunctioning since it seems rpm and ignition related..is this the issue your having?

[Gabes13]

31 electronic controle module

Is that the ecu?
Kinda ironic that it would throw a code for itself.
You should check that out.