I'm not 100% sure if this is a tuning thing or something else. Ever since my t56/HSR install I've had a funky problem. When the car is cold it will idle fine until I give it gas to back out of the garage or basically move the car at all. Once I let off the gas the idle wants to stay up there. (usually anywhere from 2k-1100 r's) As long as I'm rolling (at any speed, 1mph, or 60) it will keep the high idle. Once I come to a complete stop and wait 3-5 seconds the idle usually drops down to normal. Sometimes I have to kick the throttle a little bit to "reset" it.

Am I looking at a tuning thing here or some other problem?

 

Sticky throttle?
Minimum air adjustment?
Auto to Manual trans? Should change to a manual trans bin.

 

What? Are you asking if it's the cable itself? It only happens when cold and I have to come to a complete stop for it to drop. Most times I don't even touch the throttle. :shrug:
What's that?
What are the differences?

 

And another thing I'm confused about. Every bin I've pulled off the net has had the injector flow rate set at 22.08lbs. The 350 ones as well as the 305 ones? I set it to 19lbs and the car runs like crap. Obviously I shouldn't set it at 19 but what gives?

 

What bin are you using?
I'm not up on 305 bins. But AXXF a 305 AT bin.
AXXC AXXD AXYC are 305 mt bins. With AXYC being the newest.
Have you been looking at 350 bins? 22 is the stock size for a 350.

There is a bin search engine link up in the stickies.
And the common bins are on DIY-EFI or Moates.net too.

 

Take a look at the throttle follower items in the bin, refer to the stickies for detailed info.

 

My TA has done exactly what you describe for years now. I have yet to figure it out. I've tried everything under the sun, including new IAC, different code mods, new ECM, etc, etc.

Let me know if you have better luck

 

Well I replaced the IAC a few months ago which seemed to help alittle but didn't come anywhere near solving the issue ($50 down the drain).

However, with the coding aspect, I think my inexperience will make any progress I have with this very very slow.



I tried the AXYC bin (after taking a long while to find it...) It doesn't seem to run any smoother. I messed with the throttle follower and IAC steps a tad but haven't had a chance to drive it since.

 

Mine did it back in the stock days, so its not a programming issue. Not sure what it is.

Let me know if you ever give up and want to sell your vert. =) I'm not too far from you.

 

Never! This is my dream car. I've already thought about headstone dash plaques for when I'll be buried in it.

I've got tommorrow off so I'm going to try and get some tuning done and at least smooth out some other problems I'm having. Like idle BLMs at 108... Hopefully I can get to messing with this. Only problem is I can only play with it for so long, then it isn't cold anymore...

If you ever get bored and want to help a fellow thirdgenner out tuning.... I'll be nearby!

Was yours originally a 5speed?

 

Sounds a lot like the IAC learn feature.

I have an auto and run anjf :-)

Same type of deal. Once u drive it after u start it cold, it stays higher.

Try dropping your open loop commanded idle down some, dont go to far, remember your car is still cold.

Also decrease the time and temp it takes the IAC to learn.

Make sure your TB and IAC are properly adjusted as well

All of this should help to clear it up some. U could prolly eliminate it wholey, but I would rather it idle slightly high when cold, make sure it never dives or coughs and then stalls on you

later
Jeremy

 

Yes. Still is.

 

Its not so much that - its that after you stop long enough (5 seconds or so) the first time after moving the idle settles back down, then is fine.

 

I wouldn't mind having a high idle while cold but I don't exactly think it's related to that. Everything I can find seems to point to a 900rpm idle when cold. Which it will drop to when I drop to see (the vss stops sending a signal I assume). If I'm rolling and give it gas it'll usually hover around ~1200+

I'll try messing with the learn function today as well.

Thanks for the help and suggestions guys!