hi, before anyone says it, i have searched but couldnt find anything useful! i have a 92 camaro rs with the 305/manual and when it sits at idle it seems to misfire and it moves the whole car.. it will rev up and down a little but mostly just misses. i already tried the whole "spray carb cleaner around the engine" trick and found nothing. anyone have any idea of what it could be? could it be bad motor mounts just letting the engine shake the car? it drives perfectly fine once its over 1000 rpms... doesnt burn a drop of oil or coolant either so i dont think anything major could be wrong with the engine

im new to the muscle car world so i dont know much about them, ive always owned imports until now i know hondas have an idle air control valve that gets dirty and makes the car not idle right maybe something like that?

thanks for any help!

 

Have you checked the plugs and made sure one wasn't fouled?

 

that was my first thought but if they were wouldn't there be a symptom no matter what rpm the engine is at? but to answer your question no i havent checked them yet

thanks

 

There would but you may not notice it once you start moving, it's way more exaggerated at idle.

The carb spray trick was a good idea, I'd go over the whole vacuum system again though after you check the plugs. Just to for sure eliminate that possibility.

Also, it would help if you could go and fill out the rest of your profile so your engine/trans/etc show up under your name.

 

didnt even know i could do that! sorry im new here, ive been lurking around but finally decided to start posting..

ill have to check my plugs later on my lunch break or something. ill let you know what i find..

thanks

 

spark plugs look older but the important part looks fine. ill probably change them anyway soon but for now im assuming thats not the issue. any other things that could cause it other than a vacuum leak?

 

Well, if the plugs look fine then you could have something wrong with the plug wires themselves.

But I'd chase down the vacuum leak first to see if it exists.

 

ill have to try some things out and see if i can find a leak, maybe the stuff i was spraying wasnt effective enough to find a leak?

thanks for the help!