I have a 1990 Honda Accord which only rough idle at when its in the parking in neutral work that I've done on the vehicle has been I've cleaned out the intake plenum and I also cleaned up the throttle body this is a automatic and it's just that once the car starts it will idle regularly at start after that you press on the gas and it starts bogging up and down up and down and it will only do this during idling in parking and nutral but the car will drive just fine I topped off the fluids checked all my fluids as well oiled fine checked the map sensor I've check vacuum I've also tcr check the EGR everything is good. I've checked the for trouble code and I'm getting the trouble code 14 at the moment I don't know what that is anyone is willing to help most appreciatedsorry if my spelling is kind of its just that I was using voice command on my device

 

what do you mean by you checked the EGR? You do realize that these passages and whatnot get quite clogged in these cars. I mean removing the EGR valve and looking inside isn't enough, there is an actual procedure for cleaning out the EGR ports in the manifold that is quite a bit involved. Entirely possible that some are clogged and some aren't, causing uneven airflow to the cylinders as it goes from a single hole split down into 4 tubes that feed each cylinder.

The only other thing I can suggest is finding all the electrical ground points on the body, the bolts, eyelits and washers and thoroughly cleaning them up. The sensors in the car make precious little electricity and any resistance in the circuit will cause the information given to the computer to be different from what it's actually saying, making it inaccurate and less optimal. Your alternator will also thank you when you have clean grounds.

 

I went to my local salvage yard and got my hands on a new intake manifold along with the plenum. I my plan was to drill out the passage way to the egr but I'm afraid I might of messed this up by drilling the hills completely through and into the intake manifold passage ways. Now I'm hesitant to even remove mine ands swap it with this new one I got if I didn't mess it up then hell is ready to get installed I clean the heck out of it used almost the cams of breaks clean on the darn thing

 

Well my suggestion if you can is to take out the manifold, get an air nozzle with a rubber tip like this one:
and from the bottom of the manifold (where it feeds into the cylinders) check the flow of each EGR port. If/when you find a port that is clogged, pour some solvent into there, get a relatively stiff wire, 10gauge copper, or smaller gauge steel, whatever, and just force it in there, turning the wire around the bends and basically feed the wire through until it comes out the other end or get as far as you can. Then pull out the wire, press the air nozzle hard into the port and if it's still clogged, don't be surprised when it backs off/up. Check again with the air nozzle and if it blows through, you're good otherwise keep at it until it's clear.

Do the same for all the ports, then when they're clear, I'd pour a solvent in there and let it soak overnight, tilt the manifold so that the solvent stays in the passages while it's soaking. Then when done, pour out the solvent and try out the manifold in the car again and see if it's good.