Follow up on civic and question

This is follow up on the "free" civic that we are fixing up.

There were three main outstanding issues:

The front end had a good bounce @ highway speeds. I knew the left front upper shock mount was shot, but got the tires balanced too. One of the front tires was 2.5 ounces out of balance. It still shook, so I changed the upper shock mount out today. That turned out to be a bigger job than I had planned. All the bolts came right loose, which surprised me. The spring compressor I had was too big and would not fit, so I ended up moving it several times When done it is smooth at silk up to the speed the little car will go.

The exhaust pretty much leaks all the way from the manifold to the muffler, drivable, but getting replaced next weekend.

The big issue is the idle surge. It is getting too much air around the throttle plate somehow. The computer thinks the IAC is bad, I have replaced it and am still getting the same issue. I can hold my hand over the throttle intake, and it kills the engine, so I know it is not an external leak. I can hold a piece of cardboard over the inlet for the IAC and it will idle down to 600 RPM, nice and smooth. I am finding it hard to believe I have two bad IAC valves in a row.

The passenger windows do not work at all, that is next on the list.

Please comment, I welcome other ideas.

Anything electronic can be bad right out of the box. Many guys have mentioned on here particularly condensers, bad right out of the box. Do you have an OBD2 to use?

when a small tire takes 2-1/2 oz the tire is more then likely out of round , jack it up and put it in gear and watch the tire , id bet its out of round but it still could be in balance

Civics are good for broken wires in the door jambs, may be your window issue.

Try THREE bad vavles on my Expedition. On FORDS they will surge, run way too fast, or whistle and moan like a steam engine. All mine is a little motor with a plunger. The third one has been working perfectly for going on three years. Make sure you take throttle body cleaner with a soft toothbrush to get rid of all that carbon.

"Eric the car guy"on YouTube has some very helpful honda surging videos. Hope that helps you.
Ranch

I have a 1999 Civic, and three of the windows operate VERY slowly, the fourth (RR) not at all. From the driver's door, that is. The RR will work fine from that door switch. I assume it is the gang of switches on the driver's door that is bad, as I also replaced the driver's door window regulator/motor, but it is no faster than the original. I just live with it, for now.

As for exhaust, I replaced the exhaust manifold/catalytic converter and O2 sensors a couple of years ago, pretty sure it was under $200. I had my local trusted muffler shop patch the rest up a couple of times, but a deep pothole loosened the whole system up last month. I could buy a SS cat-back system for $150 delivered, but figured they could install one for not much more. Well, they chose this project to rod out my tailpipe, if you get my drift.

Left the original down pipe after the converter, just shortened it up to in front of the broken part, then bent up some super-thin plain steel pipe and a loud steel muffler, all of which will last 12 months and one week, no doubt. And took $392 of my cash, to top it all off.

I hate it when a 25-year business relationship gets chucked out the window. Looks like I need a new go-to muffler man.

Found out last night that there is an idle learn procedure, run above 3000 for 5 minutes then idle for 5 minutes, going to try it this morning.

Then onto the windows.