Results 1 to 18 of 18

Thread: wire resistance iacv?

  1. #1
    SEi User Demon1024's Avatar
    Join Date
    Apr 2007
    Vehicle
    86lxi hatch auto 87lxi hatch auto 88 lxi hatch 5-speed 96 sedanex 5-speed 88 carb coupe 88 sedan carb
    Location
    NW Arkansas
    Posts
    1,088

    wire resistance iacv?

    JUST SKIP TO THE END last post




    O.k i been trying to figure out that it's not my iacv (too expensive i'm cheap) rechecked resistance O.K. no ground to terminals on iacv. started looking at the ecu pin to check the continuity and one was grounded so i bypassed that wire with one straight to the computer. when i started it it was different. i had disabled my fast idle but it would still idle up when warming up,weird i thought?
    but this time when i started it with the wire it went right to idle problem solved i thought but when it warmed up it threw the 14 code again iacv? WTH? i gonna go and try reseting the ecu again but could the wire size (it's slighly smaller) have caused this or does it not go directly to the ecu? please help me out here
    Last edited by Demon1024; 03-27-2008 at 10:30 PM.

    "Weight is relative to power like time is relative to speed"



  2. #2


    Join Date
    Nov 2004
    Vehicle
    88 LXi
    Location
    Knoxville TN
    Posts
    5,205

    Re: wire resistance iacv?

    Refresm me on the pin out. Should not one be 5 volts one ground and one ? something. I am at work atm so i cant look it up.



    wp
    1988 Lxi owner since August 1995
    336k miles running strong!
    Now running E85.

    Oldblueaccord <<< MY YOUTUBE PAGE!

  3. #3
    SEi User Demon1024's Avatar
    Join Date
    Apr 2007
    Vehicle
    86lxi hatch auto 87lxi hatch auto 88 lxi hatch 5-speed 96 sedanex 5-speed 88 carb coupe 88 sedan carb
    Location
    NW Arkansas
    Posts
    1,088

    Re: wire resistance iacv?

    the wire is quite a bit longer i'm guessing too. reset same thing oh well try cleaning it again for now. Either of those things affect it? crazy thing is it wasn't throwing that code before i mess with it it's the red blue/wire connecter b4

    "Weight is relative to power like time is relative to speed"

  4. #4
    SEi User Demon1024's Avatar
    Join Date
    Apr 2007
    Vehicle
    86lxi hatch auto 87lxi hatch auto 88 lxi hatch 5-speed 96 sedanex 5-speed 88 carb coupe 88 sedan carb
    Location
    NW Arkansas
    Posts
    1,088

    Re: wire resistance iacv?

    when it's on yeah i think that's right with ignition on, i checked that in the iacv faq by forumbot and it checked out o.k. but i checked the wire against ground and it show continuity. the wires on mine are black/blue blue/red
    pinout?
    http://home.tiscali.dk/uplort/Forum/pinout%20a20a4.htm

    the check?
    https://www.3geez.com/forum/showthrea...+control+valve

    "Weight is relative to power like time is relative to speed"

  5. #5


    Join Date
    Nov 2004
    Vehicle
    88 LXi
    Location
    Knoxville TN
    Posts
    5,205
    1988 Lxi owner since August 1995
    336k miles running strong!
    Now running E85.

    Oldblueaccord <<< MY YOUTUBE PAGE!

  6. #6


    Join Date
    Nov 2004
    Vehicle
    88 LXi
    Location
    Knoxville TN
    Posts
    5,205

    Re: wire resistance iacv?

    Using a voltmeter, measure voltage between connector terminals A11 (pos) and A18 (neg). Key on.

    Black/Yellow (pos) and Black/Blue (neg) terminals

    I think it says it should be battery voltage 12 volts .


    Disconnect EACV connector. Check resistance between the 2 connector terminals on valve.
    3) Resistance should be 8-15 ohms. If not within specification, replace EACV

    8 to 15 ohms depending on temp.


    wp
    1988 Lxi owner since August 1995
    336k miles running strong!
    Now running E85.

    Oldblueaccord <<< MY YOUTUBE PAGE!

  7. #7
    SEi User Demon1024's Avatar
    Join Date
    Apr 2007
    Vehicle
    86lxi hatch auto 87lxi hatch auto 88 lxi hatch 5-speed 96 sedanex 5-speed 88 carb coupe 88 sedan carb
    Location
    NW Arkansas
    Posts
    1,088

    Re: wire resistance iacv?

    a
    Last edited by Demon1024; 10-14-2007 at 10:06 PM. Reason: dunno

    "Weight is relative to power like time is relative to speed"

  8. #8


    Join Date
    Nov 2004
    Vehicle
    88 LXi
    Location
    Knoxville TN
    Posts
    5,205

    Re: wire resistance iacv?

    No luck ?

    Ill take a look at my car and see if I can make sense of this.

    EDIT:

    OK I went and looked at mine and this is what I see. Its ice cold car 60 degrees tonight.

    Plug pulled the sensor reads 12.3 ohms. The plug has 2 wires. The Blue/red (red tracer reads 12v with the ignition on car not running. The black/blue is the ground.

    You might have the wrong thing grounded back to the ECU be careful.



    wp
    Last edited by Oldblueaccord; 10-14-2007 at 11:06 PM.
    1988 Lxi owner since August 1995
    336k miles running strong!
    Now running E85.

    Oldblueaccord <<< MY YOUTUBE PAGE!

  9. #9
    SEi User Demon1024's Avatar
    Join Date
    Apr 2007
    Vehicle
    86lxi hatch auto 87lxi hatch auto 88 lxi hatch 5-speed 96 sedanex 5-speed 88 carb coupe 88 sedan carb
    Location
    NW Arkansas
    Posts
    1,088

    Re: wire resistance iacv?

    turns out i had wired the ac switch into it i got a new one from the yard today so i'll try it see if it acctually is the problem.somthing i didn't think of before was i changed the interior harness with that of an 87 auto would this do it? i didn't think it would but? oh and mine at 74 was 12.7 ohms but i only got 11.6 volts

    "Weight is relative to power like time is relative to speed"

  10. #10
    2.0Si User
    Join Date
    May 2004
    Vehicle
    1988 Accord DX
    Location
    SEMO
    Posts
    3,510

    Re: wire resistance iacv?

    I'm not sure on what your doing with by-passing it, but if your doing what I think you did, your going to mess up the ECU & short it out. DON"T TRY that by-passing it with your ECU. Check you voltage out of the wire & make sure you didn't short out the ECU signal. Can't be bypassing wires on this or your going to fry that ECU man.
    Last edited by 88Accord-DX; 10-15-2007 at 09:03 PM.
    .

  11. #11
    SEi User Demon1024's Avatar
    Join Date
    Apr 2007
    Vehicle
    86lxi hatch auto 87lxi hatch auto 88 lxi hatch 5-speed 96 sedanex 5-speed 88 carb coupe 88 sedan carb
    Location
    NW Arkansas
    Posts
    1,088

    Re: wire resistance iacv?

    there's nothing left of the ac got rid of it a while back,but yeah i got lucky i still got the same readings when i hooked it back up.

    "Weight is relative to power like time is relative to speed"

  12. #12

    2oodoor's Avatar
    Join Date
    Jun 2006
    Vehicle
    86 LX JDM B20A
    Location
    Georgia-lina
    Posts
    9,062

    Re: wire resistance iacv?

    Quote Originally Posted by ddude2uc View Post
    I'm not sure on what your doing with by-passing it, but if your doing what I think you did, your going to mess up the ECU & short it out. DON"T TRY that by-passing it with your ECU. Check you voltage out of the wire & make sure you didn't short out the ECU signal. Can't be bypassing wires on this or your going to fry that ECU man.
    yeah, Demon1024 no kidding here. Many of the ECU 's circuits work from resistance to ground not direct ground.
    Since you replaced the harness before, recheck those bulkhead connectors and make sure a wire has not pushed out from the others in the connector. If you are manual tranny, I think there is a difference in the auto harness or either the ecm is a little different in regards to idle control circuit.

  13. #13
    SEi User Demon1024's Avatar
    Join Date
    Apr 2007
    Vehicle
    86lxi hatch auto 87lxi hatch auto 88 lxi hatch 5-speed 96 sedanex 5-speed 88 carb coupe 88 sedan carb
    Location
    NW Arkansas
    Posts
    1,088

    Re: wire resistance iacv?

    i never hooked it to the ground ground just bypassed the harness wire for wire (two anyway) this cause problems? Means somthing else in the circuit then right? or straight to comp?

    I got a new iacv and nothing changed still acts like the fast idle is working when warming up (it's not for sure, that thing is closed!) and whenever i start moving it idles up if i'm in neutral. i didn't complete bypassing the wires just one at a time and one on the comp was the wrong thankfully being an unused ac plug. i don't get it!!!! thankfully i found a dual carb prelude someones gitting rid of for $350! efi won't fit this engine will it
    Last edited by Demon1024; 10-16-2007 at 08:55 PM.

    "Weight is relative to power like time is relative to speed"

  14. #14


    Join Date
    Nov 2004
    Vehicle
    88 LXi
    Location
    Knoxville TN
    Posts
    5,205

    Re: wire resistance iacv?

    Unless the guage of the wire was very large,the wire was an unusual make,or a very long length no it should not make any differance.

    Make sure your throttle cable has slack in it at idle and reset the idle with the EACV unplugged like the book says.

    I think you confirmed that the fast idle and the warm idle are controlled separtly like I have been saying for years.


    wp
    1988 Lxi owner since August 1995
    336k miles running strong!
    Now running E85.

    Oldblueaccord <<< MY YOUTUBE PAGE!

  15. #15
    SEi User Demon1024's Avatar
    Join Date
    Apr 2007
    Vehicle
    86lxi hatch auto 87lxi hatch auto 88 lxi hatch 5-speed 96 sedanex 5-speed 88 carb coupe 88 sedan carb
    Location
    NW Arkansas
    Posts
    1,088

    Re: wire resistance iacv?

    well the fast is mechanical right no wires at all and the warm idle is completely electric so yeah don't see how they could be controlled the same way. yeah i learned somthing! 14 gauge wire no extraordinary length. but i'm pretty sure it's not the iacv since i replaced it to no avail. i'll recheck my throttle linkage.

    "Weight is relative to power like time is relative to speed"

  16. #16
    SEi User Demon1024's Avatar
    Join Date
    Apr 2007
    Vehicle
    86lxi hatch auto 87lxi hatch auto 88 lxi hatch 5-speed 96 sedanex 5-speed 88 carb coupe 88 sedan carb
    Location
    NW Arkansas
    Posts
    1,088

    Re: wire resistance iacv?

    linkage is fine i noticed it stopped while going home tonight. it's gotten colder, maybee atomic pressure sensor? tps? i'm not even sure my car has a aps.

    "Weight is relative to power like time is relative to speed"

  17. #17
    SEi User Demon1024's Avatar
    Join Date
    Apr 2007
    Vehicle
    86lxi hatch auto 87lxi hatch auto 88 lxi hatch 5-speed 96 sedanex 5-speed 88 carb coupe 88 sedan carb
    Location
    NW Arkansas
    Posts
    1,088

    Re: wire resistance iacv?

    I need a new comp don't i. i can't think of anything else to check. i guess it's not to bad,but i'm going to j/y anyway so i guess i'll see what they want for one...

    edit turned out to be a gremlin... i got him
    Last edited by Demon1024; 03-27-2008 at 09:52 PM.

    "Weight is relative to power like time is relative to speed"

  18. #18
    SEi User Demon1024's Avatar
    Join Date
    Apr 2007
    Vehicle
    86lxi hatch auto 87lxi hatch auto 88 lxi hatch 5-speed 96 sedanex 5-speed 88 carb coupe 88 sedan carb
    Location
    NW Arkansas
    Posts
    1,088

    Re: wire resistance iacv?

    I hope somone reads this kinda an old thread.
    fixin up my 87 since the demise of Mr.88. is hooking the wires from the iacv sraight through to the pins on the computer going to screw it up theres nothing in between right?

    "Weight is relative to power like time is relative to speed"

Similar Threads

  1. Cooling fan resistance?
    By hondaaccorddrew in forum 3geez Accords
    Replies: 227
    Last Post: 07-06-2012, 11:51 AM
  2. wind resistance
    By 89lxisedan in forum Classic Honda Community Chat
    Replies: 84
    Last Post: 07-06-2009, 08:57 PM
  3. pre-emptive cleaning of IACV?
    By w261w261 in forum 3geez Accords
    Replies: 4
    Last Post: 10-19-2007, 03:57 PM
  4. Anyone know what the ignition wire resistance should be?
    By Hash_man_Se_i in forum 3geez Accords
    Replies: 2
    Last Post: 10-19-2003, 06:14 PM
  5. Lower resistance = more power?
    By pimp86LX in forum Interior & Exterior Care
    Replies: 24
    Last Post: 04-06-2003, 08:19 AM

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
This website uses cookies
We use cookies to store session information to facilitate remembering your login information, to allow you to save website preferences, to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.
     
Links monetized by VigLink