ok....basic info....I have a 1995 Neon SOHC 5 speed manual transmission...with god knows how many miles on it..

ONLY on days when it is 85 degrees out or hotter my car is what i think is overheating after about 35-40 mins of driving on the freeway...as long as im in gear going down the road it is fine but when i take it out of gear to shift into a lower gear when getting off the freeway i lose all acceleration....the car doesnt ever rev when i push on the gas...if i sit for about 20 mins it will work again (thus why i think its over heating)....my temp gauge on the instrument panel stays about half way

after doing the Key dance i get the code 32 (EGR system failure) any info on this would be great

heres what we have replaced so far:

spark plug tube seals (the first time this happened there was oil in my spark plug tubes)
valve cover gasket
fuel filter
PCV valve (pain in the ***)
coil pack
all new plugs and wires
water pump
thermostat
flushed the coolant system
repalced the fans and wired them to be on all the time when my car is on

after doing all of this and not fixing the problem i finally took it to an auto shop....(mind you this was at 8 am when it was only about 65 degrees out) they let the car run for almost an hour and drove it and said it ran just fine....the code that came back from the computer are all emission codes....They told me that based on what i have told them....it could be the catalyic converter, fuel pump, or ignition coil

they didnt say head gasket but i dont think they did a pressure test...ps when it has this problem it doesnt start smoking or anything and it has no symptoms of a head gasket problem other than the "overheating"

Like i said this ONLY happens on days when its over 85 degrees and mostly very humid....if its 82 degrees it is fine

any ideas would be fantastic i just dont know what else to do

Thanks

 

maybe the plastic housing of the radiator,! there is 2 plastic tubes, one on the top where you fill the radiator, and the downstream one, connect the water pump with the radiator, that can be toast and when the car get temperature, the tube is "sucked" and the coolant dont reach the water pump

 

also try replacing the radiator cap.