BMonkey

Hey,

I've been fighting with my 06 RX8 to get my idle back and wanted a little help. About 7 weeks ago I did the Throttle body bypass (had the throttle body off of the manifold) and after reassembly everything ran fine, my idle was still smooth as silk. Then about 3 weeks ago I pulled the battery to install new radiator hoses, and this I believe is where the trouble began. I can't get back my smooth idle!

I read on here that if your intake is dirty there might be problems so I already tried pulling it back apart and VERY thoroughly cleaning it all out including the sealing surfaces... to no avail. I tried pulling the battery cables again, which after reconnecting them, the idle was smooth...smooth like butter on vida guerra's culo. That is, until I drove over to the grocery store and turned it off. Then it degraded from there into a vibrating, unstable idle rpm machine. It's not like it's stalling or anything, but since I don't have amazing horsepower numbers or wild suspension, I gotta take pride in a super smooth idle instead

So I wanted to ask if anyone has any procedural advice about how to drive the car after the battery cables have been disconnected in order to give the car the best chance at establishing a "good" LTFT.

Mazurfer

Can't really help too much other than to say...make sure that your clamps on the intake are all tightened up. Mine doesn't seem to be very different after pulling the cables. Usual rough idle once in the first few drive cycles, but only for a few seconds.
Did you happen to try and clean the MAF....maybe that's it?
If it doesn't stall.......I think I would wait a couple of drive cycles and see if it straightens back out?????????
I know it was good and then went bad, but the alternatives aren't good because then you might have to go down the plug, wires, coils....etc. path.

Razz1

You did not need to remove the TB to do the bypass.

Make sure there are no leaks.

Look under the TB plastic housing. There is a hose that needs to be attached to the VAFD if you have one or it needs to be capped off. This is for an MT.

When you say idle ... do you mean the shaking shifteror the actually RPM of the car?

Shifters will always shake.


The ilde will become smooth after a few drive cycles when you disconect the battery.

Sometimes its a week for me, but I don't drive much.

Read the reset ECU stickie and related posts. You will understand better. Then go to a club meet and learn more.

BMonkey

Well, getting that bottom coolant hose off without removing the TB...I think that's a matter of opinion. Mine wasn't budging with the angle I was having to pull on it while still on the manifold.

Anyways, I feel I should specifiy I'm not an idiot that forgets to put in air screens or tighten down a clamp. Everything is clean and attached correctly and the seals are tight and seated properly between intake box/intake hose/throttle body.

Razz1, thanks for sending me in the right direction though I didn't learn much beyond a procedure I didn't know :P , here's what I had in mind for an answer to my question. Though this particular answer is to validate that a CEL is no longer appearing, not re-establish fuel trims