DeadRX

Hello.

Idles down to about 500, lots of "shaking" at a red light in Drive. Slip it into Neutral/Park, no shaking.

Motor mounts or tranny?

lol

Help.

Please don't say tranny.



Thanks for any help.

hypervish

Have you tried cleaning the throttle body, IACV, and MAF?

500 is fairly low, should be around 750 rpm idle.

How many miles?

thomas1

Yup IACV cleaning.....

DeadRX

Hyp--163...

As you know, I cleaned the MAF, replaced air filter, replaced IACV and cleaned the throttle body about a month ago.

This has really been happening ever since...

I know that my aftermarket muffler makes "noise" in neutral/park/idle, but when you shift into D, there's a noticeable shake/vibration that clearly does not happen in the other positions. It does not shake when you're driving, just when at a light or stop sign. Sometimes it doesnt drop as low as others, but I'd say it'll go down to 550/6 and then up again to 700/750. It doesnt flutter like it did when I had bad IACV, it just goes down and feels more vibrating that when the car is not stopped, or not in drive.

^so what I'm saying is that I don't think it has anything to do with the muffler. Or, is there more air/**** being pushed through it while idling in drive than there is in neutral?

FYI when in neutral it's a 750, sometimes goes a little lower. But, not usually as low as that bolder line.
What are the next suggestions, lol?

cbrf23

I'm having this exact same issue - car vibrates quite noticeably only when stopped in drive. In park/neutral and in motion, there is no vibration. I also notice when vibrating it sounds like the exhaust is much louder than when driving. I did not notice a major drop in RPMs, but will keep my eye on it.

I will try cleaning the suggested sensors and other components and report back.

salimshah

Check for broken engine mounts, exhaust leaks due to breach in flex exhaust coupling and crack in the WU_CAT (the first catalytic converter)

Salim