Hello i am new to the site.

I have a 95 neon that is misfiring under acceleration. It does seem to run smooth if i can gently accelerate but it is so touchy it is nearly impossible to do. It also has had another intermitant problem when the outside temp is hot the car will quit running after you let it cool for a few min. it will refire and repeat. The engine temp is normal.
I checked the codes 43,32,21.
EGR valve has been replaced and 1 oxygen sensor.

Any help would be greatly appreciated !

Thanks

 

checked fuel pressure today cold or hot 50 psi either way.

This thing does not make any since to me. The outside temp is 70 today car accelerates great until engine reaches operating temp. then it goes back to missing, but it is not nearly as touchy as it was when temp was 90.

It will run smooth up to any rpm as long as you are really easy on the throttle soon as you get in it a little to much it falls on its face.

Thanks

 

Check your spark plugs and wires.

 

I had this same problem down to the car shutting off in hot weather. I come to find out after changing both 02 sensors, wires and plugs, coolant and air filter, it was the 3rd coil on my coil pack. I swapped that out and now everything runs fine. We have not had hot weather yet to test out the heat problem but it seems to run perfect now.

 

Ifinally got time to get back to work on neon. It turned out to be the spark plugs causing the problem.
Thanks for the help!

 

That would have been my first guess. Good to hear its good again for ya.