New Tune Idle not Set
Thread Starter
Drifting
Joined: Nov 2002
Posts: 1,455
Likes: 2
From: East TN
New Tune Idle not Set
I put in a hotcam in my 94 LT1 and got a new tune from pcmforless. The idle was supposed to be set to around 800 rpm but its still around 500-550. I emailed Bryan at pcmforless and he said to adjust the set screw on the throttlebody to let it reach 800 rpm.
I thought the idle was set by the IAC, does anyone know what I need to do to make this work right?
I thought the idle was set by the IAC, does anyone know what I need to do to make this work right?
Last edited by dan6712cc; Jun 8, 2005 at 10:40 AM.
Burning Brakes
Joined: Nov 2003
Posts: 935
Likes: 2
From: Beverly, NJ
You would have to disconnect the IAC and then set the idle speed. I am not sure about the modified RPM that you want, but I believe you have to set it to 400RPM with the IAC disconnected, at least on my 86. I would have to say probably 500rpm for you. Someone please chime in. I am deployed in middle east and don't have my manual to help him out...
Thread Starter
Drifting
Joined: Nov 2002
Posts: 1,455
Likes: 2
From: East TN
Originally Posted by darkman5001
You would have to disconnect the IAC and then set the idle speed. I am not sure about the modified RPM that you want, but I believe you have to set it to 400RPM with the IAC disconnected, at least on my 86. I would have to say probably 500rpm for you. Someone please chime in. I am deployed in middle east and don't have my manual to help him out...
The base RPM is around 500 but thats with the original cam, the hotcam needs around 800 RPM at idle. I asked Bryan to set that in the tune he sent me but its not working. I thought the idle set screw was only used on earlier models to set the idle not on a 94.
For some reason the idle is at 800 if its in Park but not in Drive, if that helps at all.
Race Director
Joined: Jan 2002
Posts: 12,264
Likes: 88
From: O'Fallon Missouri
Originally Posted by dan6712cc
For some reason the idle is at 800 if its in Park but not in Drive, if that helps at all.
I'm not even for sure that you can set the idle on a 94 with the TB set screw. But if you could, and had it idling at 800 rpms in drive. It would probably idle over 900 in park.
Thread Starter
Drifting
Joined: Nov 2002
Posts: 1,455
Likes: 2
From: East TN
I dont know whats wrong then, Bryan from PCMforless said he did set it in the new tune he sent me. When I told him the idle was still at 500 he said to mess with the TB set screw.
So does this mean the idle was never set in the new tune I was sent? Can someone check it for me, I have the bin I can email out.
So does this mean the idle was never set in the new tune I was sent? Can someone check it for me, I have the bin I can email out.
Thread Starter
Drifting
Joined: Nov 2002
Posts: 1,455
Likes: 2
From: East TN
Originally Posted by STL94LT1
There are two seperate PCM caibrations for park/neutral and drive.
I'm not even for sure that you can set the idle on a 94 with the TB set screw. But if you could, and had it idling at 800 rpms in drive. It would probably idle over 900 in park.
I'm not even for sure that you can set the idle on a 94 with the TB set screw. But if you could, and had it idling at 800 rpms in drive. It would probably idle over 900 in park.
Now its at least 800 in Park but drops down to around 500-550 in drive
What would be causing it to drop back down to 500 in drive assuming the pcm is now set for 800 in drive?
Race Director
Joined: Jan 2002
Posts: 12,264
Likes: 88
From: O'Fallon Missouri
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Drifting
Joined: May 2003
Posts: 1,730
Likes: 1
From: Charlotte NC
St. Jude Donor '05
Whats probally going on is that your IAC counts are maxed. This happens alot in jammed up throttle bodys or in aftermarket ones. The commanded idle is set in the computer but it requires enough in the throttle stop to put the IAC in range.
You shouldn't email Bryans bin around.
You shouldn't email Bryans bin around.
Thread Starter
Drifting
Joined: Nov 2002
Posts: 1,455
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From: East TN
Originally Posted by Alvin
Whats probally going on is that your IAC counts are maxed. This happens alot in jammed up throttle bodys or in aftermarket ones. The commanded idle is set in the computer but it requires enough in the throttle stop to put the IAC in range.
You shouldn't email Bryans bin around.
You shouldn't email Bryans bin around.
Whats the problem with emailing out the bin? No one can use it unless they have the same exact setup as me? Same cam, gears, rockers, engine,etc.. Im just trying to get help here so my car will work like it supposed to.
Last edited by dan6712cc; Jun 8, 2005 at 01:55 PM.
Melting Slicks
Joined: May 2002
Posts: 2,670
Likes: 4
From: Severna Park MD
Originally Posted by dan6712cc
Now its at least 800 in Park but drops down to around 500-550 in drive
What would be causing it to drop back down to 500 in drive assuming the pcm is now set for 800 in drive?
What would be causing it to drop back down to 500 in drive assuming the pcm is now set for 800 in drive?
My 94 with 6 speed, therefore no load from TC, idled at 800rpm with no tuning change after installing the Hot Cam. That is the base setup for a 94 with PCM.
John at Woodbridge Autotech upped the idle to 950 and that is where it remains. Of course I can't have any transmission load when sitting at a light, can I? I have to be in neutral or have the clutch to the floor (disengaged).
Mailing out that tune is going to feed yet another flame war. Are you sure you want to go there?
Race Director
Joined: Jan 2002
Posts: 12,264
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From: O'Fallon Missouri
Originally Posted by Alvin
Whats probally going on is that your IAC counts are maxed. This happens alot in jammed up throttle bodys or in aftermarket ones. The commanded idle is set in the computer but it requires enough in the throttle stop to put the IAC in range.
You shouldn't email Bryans bin around.
You shouldn't email Bryans bin around.
Alvin, don't worry. I won't use or foward this bin file, as soon as this situation is fixed. The file will be deleted.
It seems with the recent deception by one of our forum's tuners. The rest of the mail order tune users have been spooked.
-Mike
Thread Starter
Drifting
Joined: Nov 2002
Posts: 1,455
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From: East TN
Originally Posted by FELNGR8
It's the automatic, stupid. In drive it loads it down. All automatics do this.
My 94 with 6 speed, therefore no load from TC, idled at 800rpm with no tuning change after installing the Hot Cam. That is the base setup for a 94 with PCM.
John at Woodbridge Autotech upped the idle to 950 and that is where it remains. Of course I can't have any transmission load when sitting at a light, can I? I have to be in neutral or have the clutch to the floor (disengaged).
Mailing out that tune is going to feed yet another flame war. Are you sure you want to go there?
My 94 with 6 speed, therefore no load from TC, idled at 800rpm with no tuning change after installing the Hot Cam. That is the base setup for a 94 with PCM.
John at Woodbridge Autotech upped the idle to 950 and that is where it remains. Of course I can't have any transmission load when sitting at a light, can I? I have to be in neutral or have the clutch to the floor (disengaged).
Mailing out that tune is going to feed yet another flame war. Are you sure you want to go there?
So whats the point of changing the idle in the new tune if an automatic would make it go back down to 500 anyway? Am I supposed to leave my automatic in neutral at a light?
And whats the big deal about sending the tune to someone to check it? If you're having a problem with something you bought you never get a second opinion? Looks like you're the stupid one
Drifting
Joined: May 2003
Posts: 1,730
Likes: 1
From: Charlotte NC
St. Jude Donor '05
I just think its disprespectful of bryans work.. Now, when theres no work done and you have a major fraud case about to hit the courts than thats a different story.
Last edited by Alvin; Jun 8, 2005 at 02:19 PM.
Drifting
Joined: May 2003
Posts: 1,730
Likes: 1
From: Charlotte NC
St. Jude Donor '05
Originally Posted by dan6712cc
And whats the big deal about sending the tune to someone to check it? If you're having a problem with something you bought you never get a second opinion? Looks like you're the stupid one
Thread Starter
Drifting
Joined: Nov 2002
Posts: 1,455
Likes: 2
From: East TN
Originally Posted by Alvin
Why dont' you ask microsoft that. If you bought the tune from Bryan he would have helped you out. Did you think he didn't know what he was doing with a hotcam tune? I'm not getting irratable or mad but take a step back and look at it.
Melting Slicks
Joined: May 2002
Posts: 2,670
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From: Severna Park MD
Originally Posted by dan6712cc
Looks like you're the stupid one
Subtlety is lost in these forums, isn't it? I was not calling you stupid. OK?
Point is 800 rpm is the stock idle setting, and with the Hotcam that's not enough to have a smooth idle. I had mine raised to 950 to give more vacuum and smooth the idle.
I do have a 6 speed and therefore do not know what setting would be needed to get a smooth idle with an automatic in drive. OK?
I got my car dyno tuned twice to reach the point where I am satisfied. I would not do a tune by mail deal. Just what I would do and in fact did is go for a dyno session. If you are in the dyno with the tuner right there, you would both see the setting did not work. OK?
Now let me step out of this brewing war.
Thread Starter
Drifting
Joined: Nov 2002
Posts: 1,455
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From: East TN
Originally Posted by FELNGR8
What I meant by the quote "It's the automatic, stupid" was a veiled reference to Bill Clinton's quote in the 1992 election. "It's the economy stupid".
Subtlety is lost in these forums, isn't it? I was not calling you stupid. OK?
Subtlety is lost in these forums, isn't it? I was not calling you stupid. OK?
I just want to know how to fix the problem, the bin has been checked and nothing is wrong with the tune. I wasn't expecting anything wrong with it either thats why I ordered it from pcmforless, they have a lot of happy customers. I was just checking all the bases.
Alvin said it might be the throttlebody, should I clean it again, order a new one? Is there a way to check it?