Idle after 30 minutes goes rich

[louis]

Hello gentlemen.

I dont know what everyone is doing to make the B4349 table work when they are using .0320, .0330 and .0355 but every one of those makes my car start at 4-5000 rpms. I put all tunes back to stock and changed just that table and before I did I also reset the tp.

Once again I am forced to go back to .0157 and work my way down from there and have found that the iacdes_B and dynair can only be equal at .0135. This is insane and has no logic to the equations I have also tried and tested. I have even adusted the B4307 and B4308 for every conceivable value which didnt help at all.

One question I am curious about is when adjusting B4349 should I also have multiplied table B4402 iac affected area also by 44%? If not then how could I get dynair and iacdes_B in line other than doing what I did?

Sending my tune and logs also. I have not applied the map changes yet for 4307 and 4308 but will be doing shortly.

Thanks

Louis

[Chalky]

Compare my setup to yours.

[louis]

Hello and than you for the reply.

I can see the diff and have tried the same but startup screams 4-5000 rpms.

Is there anything you can see in my tune that would cause this?

Am I suppose to increase the steps in the iac affected area also?

I have read almost eerything on this subject I could find and every ones fix is so much differemt from others and I have tried just about all of them. I am at a loss of what to do next.

Thanks

Louis

[Chalky]

did you mention something about a TPS code?

[louis]

Hello.

Im pretty sure in some of the previous logs I posted had TPS error code in it.

First 30 minutes were 14.5 and running real strong then the water temp hits 80C and I would see AFR go slowly to 10.0 (approx 5 minutes time) then reduced power mode and I would shut off immediately. I would not get a TPS error every time either.

Then the confusion sets in till I notice if I just restart it when the water gets below 80C it would fire up and drive away ever time Afr at 14.5.

If I was on the highway I could go for hrs as long as I didnt get to 80C. Therefore thinking when idle learn kicked in at 80C which it was set at already was causing the issue but you also verified that table looked good.

I did finally catch the B0107 and B0108 tables and will add that to the tune right away. My next question would be if I can actually control the throttle with B0108 you have 1.20 and I see mine at 4.5-5.5% Should I go with your setting or the one I see? I am sure my tables will have a dramatic change if I could get .0330 working in B4349.

Running out to try these setting and will let you know how it goes. It is very odd that the stock tune files had supplied B0107 and B0108 with 0's. Because of this I assumed B4601 abd B4602 were the controlling factor in the maximum idle in gear and maximun idle in p/n.


Great catch though I really think this and .0330 will help with everything.

Thanks

Louis

[louis]

Hello.

Here is the results changing B4349 table from .0136 to .0310.

I went up slowly while the car was still warm. (Worried about hign screaming starts) At .0255 I could see iacdes_B .85 lbs/min start getting way out of sync with dynair 1.80.

Moving up to .0300 and after readjusting B4307, B4308 and B0101 from logged maps I started to get a flare and high idle up to 2000 rpms.

I brought it up to B4349 .0310 and the idle started rising past 2500 rpms. Seems the max idle table does not have ant different effect on my high idle starts. I could not get the idle down unless I held my foot on the brake which must lower the vacuum or something.

Checking iacdes_B was at .66 vs dynair was at 1.70 lbs/min. I tried every adjustment I could think of to bring these numbers closer together but nothing helped.

Is there something else I am missing here or am I thinking the wrong thing by trying to make the iacdes_B and dynair the same?

Even at .0310 I would still get reduced power mode and sometimes a P1221 code but not always and only at the water temp of above 80C.

Could a bad tac cause this and only at this temp act up? I cannot fathom that if sometimes it will run past 80C also. I am going to check the voltage on the sensor and the actuator and keep you posted.

Thanks for all your help so far.

Louis

[Bruce Melton]

Send me an email and I will send you a "starter" tune. You can change the IFR and it will give you a proper starting point.
meltn@new.rr.com

[Chalky]

Hello.

Here is the results changing B4349 table from .0136 to .0310.

I went up slowly while the car was still warm. (Worried about hign screaming starts) At .0255 I could see iacdes_B .85 lbs/min start getting way out of sync with dynair 1.80.

Moving up to .0300 and after readjusting B4307, B4308 and B0101 from logged maps I started to get a flare and high idle up to 2000 rpms.

I brought it up to B4349 .0310 and the idle started rising past 2500 rpms. Seems the max idle table does not have ant different effect on my high idle starts. I could not get the idle down unless I held my foot on the brake which must lower the vacuum or something.

Checking iacdes_B was at .66 vs dynair was at 1.70 lbs/min. I tried every adjustment I could think of to bring these numbers closer together but nothing helped.

Is there something else I am missing here or am I thinking the wrong thing by trying to make the iacdes_B and dynair the same?

Even at .0310 I would still get reduced power mode and sometimes a P1221 code but not always and only at the water temp of above 80C.

Could a bad tac cause this and only at this temp act up? I cannot fathom that if sometimes it will run past 80C also. I am going to check the voltage on the sensor and the actuator and keep you posted.

Thanks for all your help so far.

Louis

Based on this, it sounds like a bad tac. The reduced power http://www.gearchatter.com/viewpost12574.php

You said the tune worked before but now doesn't. Obviously, something changed.