OneFreakZ

on my 94 camaro z28 did tune up about 4,000 miles ago it has new opti,coil pulgs and wires never shak like this before all of sudden it starts to shak really bad while its on park to the point when it shuts off at times??...any ideas guys please help and suggestions please..Thanks

Gripenfelter

Do you have anyway of datalogging it?

Could be a bad opti, knock, running too rich or too lean at idle, clogged IAC, dirty maf, etc.

tyrsmkr

Unplug the maf and see how it runs.

OneFreakZ

what do you mean datalogging it puting it on the a scanner??...yeah ill try unpluging the maf lets see how it turns out??..thanks

OneFreakZ

well i unplug the maf and the car turned off...but every time i turn the car on it smells like its running rich and like a gas smell coming from the tail pipes?????..any ideas guys.

OneFreakZ

hello guys any one out there?????please ..

tyrsmkr

So it didn't run without the maf? It might take a few tries to get it going. Just unplug it and try to start it. Clean the IAC?

Is it throwing any codes at all?

OneFreakZ

ok check it out what i did was turn on the car and disconnected the maf while its running then it would shut off i didnt try starting the car while the maf is disconnected ill try that tomorrow...so what is the IAC again it slip my mind???...no codes no check engine light????....thanks

Blue96z28

yea try it with MAF disc. heres a pic of the IAC, f/ shoebox:

http://shbox.com/1/iac3.jpg

that needs to be cleaned so it will seal properly, and the housing it seals to as well, but don't force it in/out.

OneFreakZ

hey i try starting the car with the maf disc and the car would not start..???...thanks

NYC32798

I had the same problem your having and someone recommended that I clean out my IAC. I cleaned it up and it worked. It now idles great. Does it run fine after you give it gas? Does it only do it when you have the a/c on or when you turn your steering wheel while at idle? If so, it's probably the IAC. Those were the symptoms I had.

OneFreakZ

on my car it idles really shaking for as long as i have the car running even when im driving????and when i give it gas it still shakes and it back fires even if im giving the car alittle gas it still back fires???...but yeah how do i clean the IAC????....thanks

NYC32798

First make sure you go to the store and get a throttle body gasket. Take out the 4 screws holding the the throttle body onto the manifold. Then disconnect any lines that need to be disconnected from the TB in order to be able to move it so you can get to the IAC. I found it easier to just disconnect everything and remove the whole throttle body. It only took about 10 minutes to get it off and 10 more to get it back on. Either way it's an easy job. Hopefully that will help your problem.

OneFreakZ

hey did your car when it would shake did it do it all the time even when your driving??..thanks for the info ill give a shot...thanks

Blue96z28

I don't think its the IAC if it even shakes while accelerating......but the IAC is probably dirty if you've never cleaned it, so it needs to be cleaned anywayz. But if you have a violent shake while accelerating or free reving, its something else, I would think ignition - maybe burnt wire after install? bad opti or coil? Did it have these symptoms before you changed the opti/coil/wires/plugs? Same? Worse? Maybe motor mount?