ok, I know I have seen this befor (I thought tunercat had a table just for this)

anyway I did a search (just pages and pages of idleing problems and timming) and I can't seem to find info on how to just set the target idle speed (min. idle speed in the prom) I must be over looking it.

btw I am using tunercat, 6e and the arap bin and due to the cam I need to raise it up a little

 

Should be a table somewhere in there along the lines of idle speed vs. coolant temp.

Also of note, u want to try and run as few as possible if not zero IAC steps at idle in gear.

Set your TB to what your commanded idle should be and reset the IAC properly and adjust TPS as necessary.

If u fail to do this you will have weird IAC functions and hunting idle, dipping etc. LEt alone chasing yourself around trying to find the problem.

later
Jeremy

 

Jeremy is right. He mentioned the right table. Do as he says and reset minimum air using the TB set screw to get IACs as close to zero as possible for a smoother idle.

 

ok, I think I have it now. but, I my need to get a differant converter too? in park and "N" it idles fine but, once you put it in gear it keeps trying to die rpms dip to 500 rpm and then it chuggs to a death unless I two foot the thing then it is fine (the lope is nothing crazy but, maybe too much for a stock converter?)

I think I am getting on the line of this specific board but, here are the specs anyway

.544/.554 lift 230/236 dur. @ .050 112 lsa

valve timming

Int.- open 7 btdc close 43 abdc
EX- open 54 bbdc close 2 atdc

this is on a 350 HSR AFR Longtube combo (700r4)

 

Its not too much... I ran a 227/233 on a 112 lsa on a stock converter for months. If its dropping that much then its probably the IAC not beign able to open up enough for the amount of air the motor needs w/ a load on it. It might also be dropping too much of the RPM when being put into gear. Mine drops like 100 rpm, but I wish it didnt drop at all. There is a way to adjust it though, I just don't remember what setting it was....

 

if you can think of it let me know this is going to kill my super cheap build (car and all under 1500.00) but, a few test runs on the stock converter would be nice

I was going to raise my idle in the chip alittle higher yet but, my tps sensor is a none adjustable one (bbk throttle body too) so I can only crack the blades open so far and then I get too high on voltage. I may see if I can mod the sensor some how short of bending the arm

 

Look to experiment with timing in the idle region.

Also find the idle advance and retard at idle errors tables and try making them smaller.

Also with surging, it will be ampliffied if u have major timing jumps, or wild fuel jumps, like rich to lean or 20 to 25 deg timing.

Might end up liking rich and little timing or lean and lots of timing or something in between, they all end up being a little different from one another.

later
Jeremy

 

Jeremy [/B][/QUOTE] Also of note, u want to try and run as few as possible if not zero IAC steps at idle in gear.

So if I want an idle speed of 800, the min air should be about 700, maybe, and then there would be minimal dependence on the IAC?

 

that is kinda what I am trying. I have a adjustable tps sensor now so I will try redoing everything @ the higher idle rpm now

the other tps sensor was movable but, barely wich did not allow for much of a blade stop adjustment before the voltage was too high


btw thanks for the good ideas

 

well, I got the new tps sensor adjusted and found that if I have it set to zero iac counts when I take it out of gear the idle will flare to 2000 rpm and stay there until I shut it off and restart the car. (even with blip of the throttle)



now if I let the counts stay around 3-5 it seems ok, does the flare but, does come down (kind slow but, does come down) is there a way to make it step down quicker?

 

Have u set the IAC correctly?

later
Jeremy

 

I set it per. tech artical. well kinda since the rpms need to be set higher. I have the rpm set in the chip as well (950)

then I set the idle speed with the iac unpluged using the papperclip per tech artical. then I set the tPS sensor voltage.

when it is all pluged in and running it idles at 1045 to 980 rpm
but, it does what I mention above



it usually stays about 1045 and every 60 secods or so it will lower a little to 980 and then come back up. it has no real hunting just that little dip every once in a while. kinda strange but, it stays very even at idle.

 

Will the car actually idle at 950? I had problems w/ mine idling over 850 on the chip and IIRC I read that was an issue w/ the 165 ecms. That they wouldn't allow idle over 850 in gear...

 

I think it idles? maybe I over looked some thing but, it acctually idles on it's own seems to do the normal adjusting using timming and IAC steps to stay near it's target idle speed.

I have a tech one so I can't download the snap shots (unless some one has TIS -I have the cables and adapter)

anyway maybe I don't understand what I am seeing?


oh, maybe it's the in gear deal. I know once it is in gear the rpms drop a bit. maybe thats the key

 

any other idea's ? something I should look for?


well I ordered the program so hopefully I can start down loading my snap shots to a full screen