Idle Air controller - Viper Alley - Dodge Viper Forum -SRT Viper
 
Go Back   Viper Alley - Dodge Viper Forum -SRT Viper » Viper Alley » Viper Discussions - Gen I & II
» Live Feed « · War Room · Graffiti Wall · Arcade · Viper Blogs ·  

Viper Discussions - Gen I & II Discussions of Viper-related subjects covering Gen-I and Gen-II models.

Idle Air controller

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Reply
 
Thread Tools Display Modes

Idle Air controller
Old October 16th, 2020, 03:37 PM   #1
n00b
 
2challengers is offline
Join Date: Jun 2019
Posts: 2
2challengers is a B-Teamer with 60 points
Rep Power: 0
Idle Air controller

All, I need some help with my 1997 GTS. My IAC is starting to fail. My battery is new and has a good charge. My issue is that it wlll start and idle fine intially, but if you rev it up or drive as soon as you push in the clutch the idle immediately drops to a 200-300 RPM and then the engine dies. I have gotten good and braking and keeping some pressure on the gas pedal with my right foot. So far I have resisted the urge to adjust the idle stop.

I have tried cleaning it as described in many different posts and it does not seem to really help. If I disconnect the IAC for around an hour, it will reset and work for a day or so.

The number on the side of my IAC is 5245352. I have tried to purchase a replacement 5245352 and the one I recevied was too short from the flange to the tip of the plunger (~1inch) I returned that one and started a new seach. I read on forums that 53030657 and 4778637 can be used as a replacement. I ordered one of each to try but they are also too short (~1inch). See the attached picture. The one on the right side is my stock one and is ~1.25inch from the flange to the tip. Does any one know what part number I should order to get the longer version I need? It seems like I should just order the part number I have, but that did not work the first time. Thanks.
Attached Thumbnails
Click image for larger version

Name:	IAC.jpg
Views:	16
Size:	920.6 KB
ID:	149347  
  Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 

Old October 16th, 2020, 05:06 PM   #2
Landscaping Professional
 
GTS Dean's Avatar
 
GTS Dean is offline
Join Date: Jan 2003
Location: New Braunfels, Texas
Posts: 13,505
GTS Dean is not afraid of bears with 61025 pointsGTS Dean is not afraid of bears with 61025 pointsGTS Dean is not afraid of bears with 61025 pointsGTS Dean is not afraid of bears with 61025 pointsGTS Dean is not afraid of bears with 61025 pointsGTS Dean is not afraid of bears with 61025 pointsGTS Dean is not afraid of bears with 61025 pointsGTS Dean is not afraid of bears with 61025 pointsGTS Dean is not afraid of bears with 61025 pointsGTS Dean is not afraid of bears with 61025 pointsGTS Dean is not afraid of bears with 61025 points
Rep Power: 430
First of all, your car is not running at 2-300 rpm. The bottom tic mark on the tach is 500 rpm. Try counting down from 2000 and looking carefully at the marks to see what I mean.

As for the pintle projection on the various units you have pictured, I don't know if they always extend fully when powered down. It could be that they each have the same amount of total step travel in 256 increments, but you won't know for sure without powering them up. There's an IAC stepper motor routine that can be run with the DRB tool that goes from near closed to about 1400 rpm. I would bet there are other service computers like Snap-On that can do the same thing.

You might be able to bench test them with a 0-5VDC current to go from full closed to full open.
__________________
96 GTS - exhaust, brake and extensive handling mods.

Last edited by GTS Dean; October 16th, 2020 at 05:12 PM.
  Reply With Quote Quick reply to this message

Old October 16th, 2020, 05:14 PM   #3
Senior Member
 
99RT10&GTS's Avatar
 
99RT10&GTS is offline
Join Date: Jan 2003
Posts: 18,721
99RT10&GTS is not afraid of bears with 110812 points99RT10&GTS is not afraid of bears with 110812 points99RT10&GTS is not afraid of bears with 110812 points99RT10&GTS is not afraid of bears with 110812 points99RT10&GTS is not afraid of bears with 110812 points99RT10&GTS is not afraid of bears with 110812 points99RT10&GTS is not afraid of bears with 110812 points99RT10&GTS is not afraid of bears with 110812 points99RT10&GTS is not afraid of bears with 110812 points99RT10&GTS is not afraid of bears with 110812 points99RT10&GTS is not afraid of bears with 110812 points
Rep Power: 765
The problem may be tied to the PCM. Try disconnecting the battery over night to allow the reset of your PCM. I had this issue on a couple of cars, resetting the PCM fixed the issue.
  Reply With Quote Quick reply to this message

Old October 16th, 2020, 05:20 PM   #4
Kitty Wrangler Denali Owner
 
8.0L>1.8T's Avatar
 
8.0L>1.8T is offline
Join Date: Dec 2013
Posts: 7,863
8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points
Rep Power: 77
Quote:
Originally Posted by 2challengers View Post
then the engine dies
Carbon build up on throttle plates.
Engine idle speed too low.
Worn or incorrectly gapped plugs.
Faulty or crossed ignition cables.
Faulty coil(s).
Intake manifold vacuum leak.
  Reply With Quote Quick reply to this message

Old October 16th, 2020, 07:38 PM   #5
n00b
 
2challengers is offline
Join Date: Jun 2019
Posts: 2
2challengers is a B-Teamer with 60 points
Rep Power: 0
Thanks for the inputs.

I know how to read the tach. My point was it will initally start up and idle at around 750rpm like it is supposed to. If I do not touch the thottle, it is perfectly happy. After touching and releasing the gas pedal, it sputters a bit with the rpm below the 500rpm mark and then dies if I do not do anything.

I have installed them all, turned the key on. No difference in length. Started the car and the engine idles at around 2000 rpm. Removed it and no change in length. Reinstalled it and drove it around to get the engine warm. Idle never drops below about 2000 rpm. Removed again and still no change in lenght. So, for whatever reason, the IAC that was on my car when I bought it is longer and uses a different part number than expected for a 97. Hence the reason for the question I asked about the part numbers.

I purchased this car a little over a year ago. Since this car was new to me and things appeared to be neglected and the idle was rougher than it should have been, I decided to change the plugs, wires and coils. It ran great for about a month before this issue started. I did also replace the radiator, hoses and thermostat as my radiator had a slow leak. I have checked for vacuum leaks on the intake and did not find any. Again, don't think that is the issue since it did run fine for a while before this and it runs fine as long as the clutch is not pushed in and just idling at a stop.

I inspected and cleaned the IAC and the throttle bodies. Disconnecting the IAC for a few yours seem to help it run OK for a day or so. But then the issue returns.

I have not tried disconnecting the battery overnight to see if resetting the PCM fixes the problem. I will try that. Worth a shot.

So, does anyone have any thoughts on the correct part number for my IAC?
  Reply With Quote Quick reply to this message

Old October 16th, 2020, 07:53 PM   #6
Kitty Wrangler Denali Owner
 
8.0L>1.8T's Avatar
 
8.0L>1.8T is offline
Join Date: Dec 2013
Posts: 7,863
8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points
Rep Power: 77
Quote:
Originally Posted by 2challengers View Post
So, does anyone have any thoughts on the correct part number for my IAC?
Parts manual says 05245749
Name:  Screenshot_20201016-195554_1602896190838.jpg
Views: 116
Size:  7.8 KB
Name:  Screenshot_20201016-195604_1602896200190.jpg
Views: 115
Size:  6.5 KB
  Reply With Quote Quick reply to this message

Old October 16th, 2020, 07:58 PM   #7
Enthusiast
 
HughJass's Avatar
 
HughJass is offline
Join Date: Jul 2020
Posts: 116
HughJass is kissing alot of ass around here with 526 pointsHughJass is kissing alot of ass around here with 526 pointsHughJass is kissing alot of ass around here with 526 pointsHughJass is kissing alot of ass around here with 526 pointsHughJass is kissing alot of ass around here with 526 pointsHughJass is kissing alot of ass around here with 526 points
Rep Power: 4
I ordered standard motor products ac103 off of Amazon and it's been working fine
  Reply With Quote Quick reply to this message

Old October 16th, 2020, 10:39 PM   #8
Senior Member
 
jslimm is offline
Join Date: Dec 2005
Posts: 3,051
jslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 points
Rep Power: 88
Quote:
Originally Posted by 2challengers View Post
I have installed them all, turned the key on. No difference in length. Started the car and the engine idles at around 2000 rpm. Removed it and no change in length. Reinstalled it and drove it around to get the engine warm. Idle never drops below about 2000 rpm. Removed again and still no change in lenght.
I have no personal troubleshooting experience on this. However, my reading indicates that the "plunger" should exhibit movement if the harness is connected, the IACV is sitting out and visible, and the ignition switch is turned on and off.

Someone with more practical Viper experience can verify if that is the case on this specific IACV used in the Viper application. Perhaps the reason there is no movement is an indication of failure of something other than the IACV, such as harness connections or PCM driver circuit. Just things to contemplate.

Last edited by jslimm; October 16th, 2020 at 10:46 PM.
  Reply With Quote Quick reply to this message

Old October 16th, 2020, 10:44 PM   #9
Senior Member
 
jslimm is offline
Join Date: Dec 2005
Posts: 3,051
jslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 points
Rep Power: 88
Quote:
Originally Posted by 8.0L>1.8T View Post
Parts manual says 05245749
I believe that he is asking for the part ID'ed as number 7 in that 1997 parts diagram. # 04778637

OP, FWIW, the OEM parts list is available here:

https://www.roeracing.com/downloads/

https://www.viperpartsrackamerica.co...lve-04778637ab
  Reply With Quote Quick reply to this message

Old October 17th, 2020, 02:38 AM   #10
Senior Member
 
dirtbag's Avatar
 
dirtbag is offline
Join Date: Apr 2007
Posts: 3,480
dirtbag is not afraid of bears with 11387 pointsdirtbag is not afraid of bears with 11387 pointsdirtbag is not afraid of bears with 11387 pointsdirtbag is not afraid of bears with 11387 pointsdirtbag is not afraid of bears with 11387 pointsdirtbag is not afraid of bears with 11387 pointsdirtbag is not afraid of bears with 11387 pointsdirtbag is not afraid of bears with 11387 pointsdirtbag is not afraid of bears with 11387 pointsdirtbag is not afraid of bears with 11387 pointsdirtbag is not afraid of bears with 11387 points
Rep Power: 90
Are you sure the root cause is the IAC? TPS sensor is a known failure point that'll cause all sorts of idle and surging issues when it starts to wear down causing false readings.

For example, if TPS thinks your throttle is 50% open, the PCM will command the plunger to be fully closed at all times.
  Reply With Quote Quick reply to this message

Old October 17th, 2020, 08:18 AM   #11
Kitty Wrangler Denali Owner
 
8.0L>1.8T's Avatar
 
8.0L>1.8T is offline
Join Date: Dec 2013
Posts: 7,863
8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points8.0L>1.8T is not afraid of bears with 10060 points
Rep Power: 77
Quote:
Originally Posted by jslimm View Post
Quote:
Originally Posted by 8.0L>1.8T View Post
Parts manual says 05245749
I believe that he is asking for the part ID'ed as number 7 in that 1997 parts diagram. # 04778637

OP, FWIW, the OEM parts list is available here:

https://www.roeracing.com/downloads/

https://www.viperpartsrackamerica.co...lve-04778637ab
#5 or #7?
Name:  Screenshot_20201017-081727_1602940682671.jpg
Views: 63
Size:  9.0 KB
  Reply With Quote Quick reply to this message

Old October 17th, 2020, 08:48 AM   #12
n00b
 
Robertk is offline
Join Date: Oct 2020
Posts: 1
Robertk is unremarkable with 10 points
Rep Power: 0
Quote:
Originally Posted by 2challengers View Post
Thanks for the inputs.

I know how to read the tach. My point was it will initally start up and idle at around 750rpm like it is supposed to. If I do not touch the thottle, it is perfectly happy. After touching and releasing the gas pedal, it sputters a bit with the rpm below the 500rpm mark and then dies if I do not do anything.

I have installed them all, turned the key on. No difference in length. Started the car and the engine idles at around 2000 rpm. Removed it and no change in length. Reinstalled it and drove it around to get the engine warm. Idle never drops below about 2000 rpm. Removed again and still no change in lenght. So, for whatever reason, the IAC that was on my car when I bought it is longer and uses a different part number than expected for a 97. Hence the reason for the question I asked about the part numbers.

I purchased this car a little over a year ago. Since this car was new to me and things appeared to be neglected and the idle was rougher than it should have been, I decided to change the plugs, wires and coils. It ran great for about a month before this issue started. I did also replace the radiator, hoses and thermostat as my radiator had a slow leak. I have checked for vacuum leaks on the intake and did not find any. Again, don't think that is the issue since it did run fine for a while before this and it runs fine as long as the clutch is not pushed in and just idling at a stop.

I inspected and cleaned the IAC and the throttle bodies. Disconnecting the IAC for a few yours seem to help it run OK for a day or so. But then the issue returns.

I have not tried disconnecting the battery overnight to see if resetting the PCM fixes the problem. I will try that. Worth a shot.

So, does anyone have any thoughts on the correct part number for my IAC?
You might want to just try unplugging the three connectors to the PCM for the reset for about 15-20 mins, I had an idle issue after a battery went low, did a PCM reset... then turned key on, don't start and slowly depress gas peddle to WOT about five times to set throttle position, turn key off and then start, my idle went back to perfect
  Reply With Quote Quick reply to this message

Old October 17th, 2020, 10:21 AM   #13
Senior Member
 
jslimm is offline
Join Date: Dec 2005
Posts: 3,051
jslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 pointsjslimm is not afraid of bears with 10934 points
Rep Power: 88
Quote:
Originally Posted by 8.0L>1.8T View Post
#5 or #7?
I believe his photos in post 1 are item 7 in the diagram. The description in the parts manual is a bit confusing.
  Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

  Viper Alley - Dodge Viper Forum -SRT Viper » Viper Alley » Viper Discussions - Gen I & II

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Viper Alley - Dodge Viper Forum -SRT Viper forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Insurance
Please select your insurance company (Optional)

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes
Postbit Selector
Switch to Left (legacy) postbit Use Vertical (Legacy) Postbit

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




All times are GMT -5. The time now is 04:11 PM.

vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
ViperAlley.com is in no way affiliated with Daimler Chrysler. Dodge, Viper, RT/10, the Viper logo and likeness are registered trademarks of Daimler Chrysler.
The contents of this site are owned by ViperAlley.Com and may not be used or reproduced without the express written permission of the Administrator.