I have a 95' accord ex 5sp, I don't know when or if the clutch has been changed but it seems to be fine so I don't think that is the problem.

At about 1800 rpm in 3rd, 4th, or 5th gear a/c on or off the car bucks but when I give it more gas and hold it at around 2000 or above it doesn't buck anymore. I can't figure out what it might be. The car has never done this before.

Anything will help. Thanks.

 

maybe the word buck is too much, it is more of a shudder the car has 157000miles on it

 

check egr or o2 sensor?

 

1800 is around the majic rpm where you will notice a lean surge from your EGR ports and/or valve being blocked up with carbon. When is the last time you cleaned out your EGR system??? Do you have any modifications to the engine?

SOHC

 

Sea Foam it!!!

 

Seafoam may help, but to really clean it if its truely caked up you will need to remove the injectors to get to the EGR manifold on top of the intake runers. Remove the manifold cover and clean out all the passages in it as well as the holes in the top of the intake runners. You may even require a removal of the EGR valve and possibly the Intake manifold depending on how far back it has plugged up...

There are detailed instructions in the FAQ... https://honda-tech.com/zerothread/1664547

sohc