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Thread: Sniper IAC stuck at Hold Position.

  1. #1

    Default Sniper IAC stuck at Hold Position.

    So just yesterday my car started running horribly at idle after start, and the RPM just slowly puttered down and down till the engine stalled & died. It's been running for over a year just fine. After searching around the screens for what was going on, the IAC is sitting at its Hold Position (5%) and just sits there never budging even as the RPM drops. In fact, it never moves at all regardless of driving inputs. Is this a reading of its physical position (like it's stuck), or is this the requested position, and for some reason it's just not asking it to move. I changed its requested Hold Position and now it shows 10%, but I don't know if this means it physically opened more, or it's just asking to.

  2. #2
    Join Date
    Dec 2009
    Location
    Connecticut
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    22,903

    Default

    Is the TPS sensor working properly?
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  3. #3

    Default

    After checking it this morning, the TPS says 65% when it powers on and goes to 99% when you press the pedal. So I think the TPS has gone out. If I unplug the TPS completely it will prime and start & run, albeit grumpily it'll get me to and from work until the new TPS comes in. Is there a fix for the TPS going out or just replace it with another and hope it doesn't strand me in the future again? The Sniper is only about a year old. (It completely refused to start at all, never tried to prime, and would just crank & crank and not turn over. So I was late to work cause it stranded me for a good while.)

  4. #4
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    22,903

    Default

    Yes, replace the TPS sensor - LINK. The Sniper EFI calibrates the TPS sensor at every key-on event. If replacing the TPS, the TPS sensor is located at the end of the primary throttle shaft, opposite end of the throttle lever. It's slotted, so install it in the same position. Holley 543-111 TPS or Standard Motor Products TH191 TPS. http://forums.holley.com/showthread....=2760#post2760 (Replacement Sensors For Holley EFI - Auto Parts Store)

    (JWoodrell, please don't type your posts like you're texting. It takes me a long time to edit it. At least use Spell Check before posting.)
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  5. #5

    Default

    Thank you, that seemed to fix it, and thankfully it was easy to install, once I had it in hand from the local store.

  6. #6
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    22,903

    Default

    You're welcome.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

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