92 civic si with d16z6. every time im driving any little bump i hear this rattling sound as if my exhaust is loose. it also happens when im idling at a light when the rpm drop below 1100. i have gone over the exhaust, as i just replaced with. everything is tight, mounts are good. i also checked my lower control arms as well checked wheel barrings. and i can't seem to find where this rattling is coming from.

the 2nd problem i have is recently the car started misfiring. i just replaced the plugs and wires and distributor rotor. it wasn't happening for a week since i did that, and now it started again. No CEL.

I am doing a water pump, timing belt, tensioner today so i just want some places to look to fix these other two problems while im outside today.

thanks guys

 

You check to see if your heat shields are loose?

 

yes i did, the rattling sound seems like its coming from the mid pipe or that area.

 

Pics? Ebay exhaust?

 

its a 2.5" yonaka catback with a test pipe. ill grab some pics shortly.

 

I would lighty hammer the exhaust with a rubber mullet and see if you can duplicate the noise.

 

That is a problem I have had with my yonaka exhaust. I always thought it came from the muffler itself but its possible the resonator. Never bothered trying to figure out exactly where it was coming from since it is only noticable at certain rpms. I had to replace my distributor recently due to a misfire that gradually got worse. Rockauto was the cheapest and fixed my issue.

 

Hmmm have had the same problem with OEM muffler. Turned out to be my loose front bumper that was squeaking and rattling as I idled.

 

Cap and rotor? Or just rotor?
And you can ohm out the igniter in the dizzy to see if its still good.
Also check the plugs gaps make sure there right. A lot of people just pop them in and good and there off a lot of times.

And the exhuast could be a few things. Just idle it and get under there and look/listen.
My downpipe would rub up in my oil pan when everything was hit and at idle.