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ECMlink Omni Power 4 BAR not reading correctly

Posted by ThunderChild, May 16, 2019

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  1. ThunderChild

    ThunderChild Supporting VIP

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    this is for my red 92: recently changed my I/C setup and swapped to a 3" GM MAF in blow-through, IAT and OP 4 BAR MAP with an ECMlink PnP buffered adapter harness.

    the car runs fine, but the OP MAP doesnt seem to fluctuate at all, nor read a correct pressure as far as i can tell. i have MTX gauges, and the boost gauge runs a MAP as well (3 or 4 bar, id have to check to be sure), and has seemed to be correct from day one, checked against a mechanical gauge to within .5 psi and around the same in/hg.

    ive tried it wired to the buffered input harness as per ECMlink wiki, and also hardwired it to the car side of the MAF plug per ECMlink wiki, the only differences were the values logged in link. on the buffered input, signal was very erratic and after about 1-2 min would flatline to 26.4in/hg with no fluctuation, and directly hardwired, it sits at 6.9in/hg, then goes to ~12in/hg under throttle (which is backwards...).

    i still have some testing to do, but im almost wondering if the MAP is just bad. both the OP and MTX MAPs are tapped in just off the manifold on the brake booster line, with around 4-6" of line to each, the MTX the further of the two. i do plan to remedy this to a better option at a later date, but i have other projects in front of that endeavor.

    mods should be current in profile, and i can get pics logs if needed.
     
    Last edited: May 16, 2019

    99  8

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  2. Twinturbo120

    Twinturbo120 Supporting VIP

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    Dudeeeee I'm having the same issue but mine reads 42.2 psi.

    I emailed ecm tuning to see what they say.

    Hopefully someone will chime in.
     

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  3. ThunderChild

    ThunderChild Supporting VIP

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    I haven't emailed them yet, but I posted on the ecmlink forums. If I can't sort it on here or there, I'll email them and see what they say.

    Are you using the PnP harness as well?
     

    99  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 580  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

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    1992 Eagle Talon TSi AWD
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    1992 Eagle Talon TSi AWD
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  4. EVLGSX

    EVLGSX Proven Member

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    As good as they work when they function correctly-

    The OMNI 4 Bar fails notoriously. Good news is that they are well aware of the issues and a quick phone call will have you a new one at your doorstep in days......zero questions asked.

    I personally went through 3 units inside 30 days and fianally switched to an AEM stainless. Zero issues since.

    Brand new OMNI #4 sits on the shelf.
     

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  5. Twinturbo120

    Twinturbo120 Supporting VIP

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    Yuppp, PnP as well. The IAT reads correctly, so does everything else.
     

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  6. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    I had one read bad and got ahold of Thomas and they sent me another unit, asap. Been a couple years ago. So what is the better 4 or 5 bar MAP to use, other than the OMNI? I am on the edge of a 4 bar unit.
     

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  7. EVLGSX

    EVLGSX Proven Member

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    in comparison the aem units are pretty sweet
     

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  8. ThunderChild

    ThunderChild Supporting VIP

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    Same here. I'm starting to think it's just a bad map. I doubt they'll swap me one, I originally bought it a few years ago when I got ecmlink, but only recently installed it.

    I may see about sourcing another map sensor anyway, like a screw in style, but waiting on more info for now.
     

    99  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 580  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

    Street Build 801  1

    1992 Eagle Talon TSi AWD
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  9. Twinturbo120

    Twinturbo120 Supporting VIP

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    Hopefully they reply to my email, I bought it last week. I installed it this past Sunday, so they should be able to help me out.
     

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  10. ThunderChild

    ThunderChild Supporting VIP

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    Yea in that time frame they shouldn't have a problem taking care of you. Post back once you hear from them!

    Tested my harnessd just before the rain hit, and there's no odd readings with that, so I'm assuming it's a bad sensor, I will email ecmlink tonight or tomorrow and see what they say.
     

    99  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 580  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

    Street Build 801  1

    1992 Eagle Talon TSi AWD
    manual · 1G DSM

    Street Build 2K  10

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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    Twinturbo120 and 1990TSIAWDTALON like this.
  11. ThunderChild

    ThunderChild Supporting VIP

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    Rathdrum, Idaho
    havent heard from ecmlink in the past week, i know theyre busy, and i cant find any wiring related issues that indicate a problem. im probably going to order a new sensor and if that doesnt work ill pursue ecmlink contact more heavily.

    anyone else having a hard time contacting them or getting a reply?
     

    99  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 580  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

    Street Build 801  1

    1992 Eagle Talon TSi AWD
    manual · 1G DSM

    Street Build 2K  10

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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