Idle wants to bounce and surge as motor warms up
09-29-2014, 09:29 AM
#22
Mine used to do **** like that. It was a combination of the Fast brand TB and the RAFIG table it seems. After switching TB and then redoing the RAFIG table it's been fine.
But every once in a blue moon it still will do weird things when idling and get random idle hangs (most notably after driving on the highway, when getting off on an exit it will want to idle high until I come to a complete stop)
But every once in a blue moon it still will do weird things when idling and get random idle hangs (most notably after driving on the highway, when getting off on an exit it will want to idle high until I come to a complete stop)
09-29-2014, 09:32 AM
#23
Mine was a 90mm.
With EFI Live it's as simple as logging a cold start with the proper PIDs selected and it will build a table for idle airflow average differences to add or subtract from the table in the tune.
I wouldn't stress too much until the tune is gone over from cold, either drop the car over night or trailer it for best results. I had to tweak mine a couple times.
With EFI Live it's as simple as logging a cold start with the proper PIDs selected and it will build a table for idle airflow average differences to add or subtract from the table in the tune.
I wouldn't stress too much until the tune is gone over from cold, either drop the car over night or trailer it for best results. I had to tweak mine a couple times.
09-29-2014, 12:04 PM
#25
TECH Fanatic
Mine starts to idle high when warm, if I pull the IAC and extend the shaft, refit it will idle as it's meant to.
My tuner will at some time try and sort it.
This started to happen with my old IAC after my new Tick stg 3 cam was fitted so I fitted a new IAC & same thing.
I had a 102 PTM TB at first & have since changed to a NW 102 TB and same thing
My tuner will at some time try and sort it.
This started to happen with my old IAC after my new Tick stg 3 cam was fitted so I fitted a new IAC & same thing.
I had a 102 PTM TB at first & have since changed to a NW 102 TB and same thing
09-29-2014, 12:34 PM
#27
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More than likely it's definitely tune related. Can you get your tune file and PM it to me. At roughly 15* of overlap you're right at the point where idle tuning is going to be a bitch. Mine has 24.5* of OL. I would have ran it in SD as well, you have much more fueling control in this state. This current tune you have is not supposed to be starting and driving like a DD. You said it was a MAIL ORDER base tune? If thats the case then hell yea, there has obviously been no logging of your particular setup and what your car wants. Hopefully you get it resolved. If you could get me the tune, I could more than likely tell you right away what the problem is... IE tune or mechanical.
09-29-2014, 12:36 PM
#28
Not mail order anymore. It's been street tuned with a wideband. Like I said, it drove and idled fine for the 2 hours during the tune. Just after that it won't hold idle right.
I don't have a way to get you the tune - I'm thinking about ordering HPT today. But I don't expect it to drive like a DD. But I do expect it to idle and not surge to 2000 at a light where I'm nearly blowing through the brakes lol.
I don't have a way to get you the tune - I'm thinking about ordering HPT today. But I don't expect it to drive like a DD. But I do expect it to idle and not surge to 2000 at a light where I'm nearly blowing through the brakes lol.
09-29-2014, 12:42 PM
#29
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It could be anything when diagnosing over the internet. If I could see the file, I would be more help.
This is the basic idle tuning thread that helped me tame mine.
Edit-I would buy HPTuners if I were you
This is the basic idle tuning thread that helped me tame mine.
Edit-I would buy HPTuners if I were you
09-29-2014, 12:56 PM
#31
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It could be anything when diagnosing over the internet. If I could see the file, I would be more help.
This is the basic idle tuning thread that helped me tame mine.
Edit-I would buy HPTuners if I were you
This is the basic idle tuning thread that helped me tame mine.
Edit-I would buy HPTuners if I were you
Anyone that plans on keeping their Fbody or modding it should definitely get HP tuners. It's a steep learning curve, but very rewarding. You also don't have to rely on someone else every time you change something. It takes a little work to make a big cam streetable and not all tuners will go to that length.
09-29-2014, 01:23 PM
#32
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I'm about halfway through that thread, it has been a huge help. I couldn't get my car to idle with all the changes so I had to adjust the screw on the tb which caused more problems, but it should be fixed now. Time to start logging tonight!
Anyone that plans on keeping their Fbody or modding it should definitely get HP tuners. It's a steep learning curve, but very rewarding. You also don't have to rely on someone else every time you change something. It takes a little work to make a big cam streetable and not all tuners will go to that length.
Anyone that plans on keeping their Fbody or modding it should definitely get HP tuners. It's a steep learning curve, but very rewarding. You also don't have to rely on someone else every time you change something. It takes a little work to make a big cam streetable and not all tuners will go to that length.
09-29-2014, 02:21 PM
#33
It could be anything when diagnosing over the internet. If I could see the file, I would be more help.
This is the basic idle tuning thread that helped me tame mine.
Edit-I would buy HPTuners if I were you
This is the basic idle tuning thread that helped me tame mine.
Edit-I would buy HPTuners if I were you
09-29-2014, 03:41 PM
#34
Okay. I was thinking of getting HPT Pro but not necessarily grabbing a wideband with it, as I'd still rather take it to a dyno and get it tuned there. Would it be worth it to grab Pro or just use the standard for tweaks and things and then upgrade later if needed?
I'm thinking the standard edition might be good, but if I need the datalogging on the street with a wideband, I'll go ahead and do it now.
I'm thinking the standard edition might be good, but if I need the datalogging on the street with a wideband, I'll go ahead and do it now.
09-29-2014, 05:59 PM
#35
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Okay. I was thinking of getting HPT Pro but not necessarily grabbing a wideband with it, as I'd still rather take it to a dyno and get it tuned there. Would it be worth it to grab Pro or just use the standard for tweaks and things and then upgrade later if needed?
I'm thinking the standard edition might be good, but if I need the datalogging on the street with a wideband, I'll go ahead and do it now.
I'm thinking the standard edition might be good, but if I need the datalogging on the street with a wideband, I'll go ahead and do it now.
