OFT Unstable revs when shifted to R/D from Parking

[powerwdp]

Originally Posted by steve99

The ecu runs through thte rows in order from 1-8 , over the warm up period


I think they just made a mistake when the made the tune

I didn't drive it a a lot these days but today the cold start is a bit weird. The idle rev is falling quickly after starting, and bouncing up repeatedly. But luckily the original idle rise when gearing is totally gone.

I've linked another video for it, the bouncing is at 00:18. Not sure how I can modify the MAF table to improve it.

And there is some grinding noise when rev changes, is that normal or a leaking?

Thanks.

My current MAF correction table:

[powerwdp]

Originally Posted by tomm.brz

in those tables, the first 2 rows do not set the idle rpm, mostly just the initial throttle blip behaviour
rows 3-8 best to keep them stock for warm/hot start stability

I switched row 7-8 with row 1-2. The idle rise after gearing is gone, but the cold start has some weird issue shown in the video above. Maybe this time keep 1-2 & 7-8 the same? Also trying to figure out the grinding noise.

But at least the exhaust sound is just as good as I expected.

[steve99]

Originally Posted by powerwdp

I switched row 7-8 with row 1-2. The idle rise after gearing is gone, but the cold start has some weird issue shown in the video above. Maybe this time keep 1-2 & 7-8 the same? Also trying to figure out the grinding noise.

But at least the exhaust sound is just as good as I expected.

Dont change the maf aftercstart tavles what you have is correct.


Any grinding noise has nothing to do with tune its a hardware issue.


The rpm change may be incorrect settings in ghe idle target tables

[powerwdp]

Originally Posted by steve99

Dont change the maf aftercstart tavles what you have is correct.


Any grinding noise has nothing to do with tune its a hardware issue.


The rpm change may be incorrect settings in ghe idle target tables

There are 9 idle target tables, should I make them the same for all?

[steve99]

Originally Posted by powerwdp

There are 9 idle target tables, should I make them the same for all?

Looks like someone has messed with those tables at some point , year you could make them all the same if you wanted . Maybe copy table F into the rest.

[powerwdp]

Originally Posted by steve99

Looks like someone has messed with those tables at some point , year you could make them all the same if you wanted . Maybe copy table F into the rest.

The problem still exist.

After that one-time bouncing back the rev is around 1.2k and quite steady for some seconds, not sure if that is a little bit too low for warming up in winter.

[powerwdp]

Updated:

I just rise the stock oft v4 rune idle target table A/B from 1200 to 1400, MAF correction row 1-2 starting from 25, 3-8 stay the same as lower value. There is still one small rev bouncing at cold start but is quite stable afterward and is high enough for winter warming up.