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Installed Uberdata Idle surge help!!!!

Old 06-14-2005, 10:37 PM
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Default Installed Uberdata Idle surge help!!!!

I just finished my turbo kit so I decided to start the car. I wanted to take it around the block w/ the wastegate unhooked to make sure the car was running right stock. With the uberdata in, it surges from 500 to 1200 rpm contantly. I hook my stock ecu back up and it'll idle fine. I'm using the stock p06 bin. on my d16y7 obd2b car. Everything seems fine. The only thing I can think of is the obd2b to obd1 harness is a obd2a to obd1. Anyone please chime in even if you have the slightest clue. I really wanna boost.
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Old 06-15-2005, 01:19 AM
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Default Re: Installed Uberdata Idle surge help!!!!

I have heard of people having the problem with the later versions of Uberdata. Try switching to an older version, I think that 1.6 was what one guy said he tried and it confirmed the idle was simply the program.

It could also be that OBDI cars have a FITV (fast idle thermal valve) and you do not.
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Old 06-15-2005, 03:52 AM
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Default Re: Installed Uberdata Idle surge help!!!!

actually your problem is your IACV. when going from obd2 to obd1 on that motor, you have to convert the IACV's from a 2 wire to a 3 wire, or a 3 wire to a 2 wire. can't remember exactly which one right now. but anyways, swap in a y8 intake manifold w/ the obd1 IACV and you'll be good to go. if you don't wanna swap em out, just block off the IACV w/ a piece of rubber, or a can or something.
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Old 06-15-2005, 07:15 AM
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Default Re: Installed Uberdata Idle surge help!!!!

sweet, i'll let you guys know how it'll work. I got a y8 manifold on the side but I gotta get a 2 wire iacv. I'll try unplugging it to see if it'll make a difference. What effects will blocking it off do? You guys are great. Very helpful.
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Old 06-15-2005, 11:14 AM
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Default Re: Installed Uberdata Idle surge help!!!!

block off = little or no idle surge. my buddy did it on his, and it surges every once in a while a little bit, but if you just tap the gas it goes away
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Old 06-17-2005, 01:57 AM
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Default Re: Installed Uberdata Idle surge help!!!!

Originally Posted by darksol2005
actually your problem is your IACV. when going from obd2 to obd1 on that motor, you have to convert the IACV's from a 2 wire to a 3 wire, or a 3 wire to a 2 wire. can't remember exactly which one right now. but anyways, swap in a y8 intake manifold w/ the obd1 IACV and you'll be good to go. if you don't wanna swap em out, just block off the IACV w/ a piece of rubber, or a can or something.
Yup yup, just block off the stupid IACV and be done with it. The car will idle rock solid + stocklike with no IACV, but sometimes you have to fiddle the air bleed and/or throttle stop to get it that way. LOTS easier than swapping IMs.

Originally Posted by Cray91
I have heard of people having the problem with the later versions of Uberdata. Try switching to an older version, I think that 1.6 was what one guy said he tried and it confirmed the idle was simply the program.
/quote]

Some variants of Ubercrap got a little janky with how they controlled the purge solenoid. Cold idle surging and intermittant surging once warmed up, similar to an improperly bled cooling system, occurs.

I just block off the purge solenoid from getting any vacuum - problem solved.
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Old 06-17-2005, 02:01 AM
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Default Re: Installed Uberdata Idle surge help!!!!

Learn to use quotes properly newb.
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Old 06-17-2005, 02:25 AM
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Default Re: Installed Uberdata Idle surge help!!!!

OMG I HAVE JUST BEEN OWNED!!1 Can I get a side of v-tech with that?
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Old 12-02-2005, 03:53 PM
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Default Re: Installed Uberdata Idle surge help!!!!

Yup yup, just block off the stupid IACV and be done with it. The car will idle rock solid + stocklike with no IACV, but sometimes you have to fiddle the air bleed and/or throttle stop to get it that way. LOTS easier than swapping IMs.


Can someone discribe where this is? or even better post a picture of it? my setup is a B16 swapped into a Civic EX, bastardized sensors (so I'm not sure if i've got an EX sensor, or a B16 sensor)...like I know for example that my MAP sensor is an EX, but I think most others that are ON the motor are the JDM ones.

Any help would be appreciated. Ben
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