Question about 1992 Mercury Topaz

2 Answers

Stumbles 2nd gear on Idles and revs in neutral fine

I have a 93 Mercury Topaz 2.3 manual trans, that the small ground wire from the battery to the core support broke. After repalcing that wire, the car now wont accelerate over 1500 rpm in 2nd gear on. It will idle fine and with no load, it will rpm just fine.I did Cap,rotor, wires, plugs and Ignition module and fuel filter and has not changed the problem any.

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  • 8 more comments 
  • jrperform714 Jun 15, 2009

    not carburated. Does this change the spolution?

  • jrperform714 Jun 15, 2009

    This is not a carb motor as last expert said. 2.3 injected.

  • jrperform714 Jun 15, 2009

    code 538 is only code during the read.

  • jrperform714 Jun 15, 2009

    have to head to work at 2pm central time(10 min. Will be back tomorrow around 10 am central on tues.

  • jrperform714 Jun 16, 2009

    Changed maf and still does same thing. Checked fuel pressure down the road and it stays at around 50 psi.

  • jrperform714 Jun 16, 2009

    Connector has been changed. Check engine light does not work on the dash. Will a reader pull the codes?

  • jrperform714 Jun 16, 2009

    reader has the following codes:

    111 System pass

    214 Balance test failed

    528 Clutch switch circuit fault

    Any help?

  • jrperform714 Jun 16, 2009

    Actron 3140 scanner under koeo test thats what codes come up. Under koer side other codes come up. So how does it read 3 digit codes?

  • jrperform714 Jun 16, 2009

    koer side comes up with code 538

  • jrperform714 Jul 06, 2009

    Sorry. Had major family medical issues. Was ECM.How do i accept so you get paid?



2 Answers

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  • Mercury Master
  • 81,342 Answers

What code do u have?

Posted on Jun 15, 2009

  • 4 more comments 
  • Marvin
    Marvin Jun 15, 2009

    Your year has only two numbers in the trouble codes for the engine, this system is called OBD 1, or EEC IV by Ford techs, here is a list of those codes and how to get them using the check engine light blink to read them. Go to link.

    Have you had the MAF sensor recall done? contact a Ford dealer with your cars VIN if not sure they can look it up, this recall covers a problem that makes the car run like do do.


  • Marvin
    Marvin Jun 16, 2009

    The problem with the MAF was not the MAF itself but the connector to the MAF, u will be able to see if a new connector was spliced on, the splice connections have heat sealed shrink tubing around them, it is dark grey in color, if it hasn't been done get the repair connector and replace the MAF connecortor, also Please read the trouble codes again as outlined in the web link from last post and let me know what u find,

  • Marvin
    Marvin Jun 16, 2009

    you will need a ford reader, do u have one? it is called a "Start Tester", also if check engine light doesn't work that could be related to the problem, you may have a defective ECM.

  • Marvin
    Marvin Jun 16, 2009

    these are not valid codes for a 1993 Ford/mercury system, they are 2 digit only.

  • Marvin
    Marvin Jun 16, 2009

    can u call me at my home? 925-459-0571

  • Marvin
    Marvin Jun 16, 2009

    these are the possible codes for your system.

    Ford's common codes for OBD1 (vehicles made before 1995)

    11 system pass
    12 idle control fault
    13 dc motor did not move
    14 engine rpm signal fault or PIP circuit failure
    15 eec processor or power to KAM interrupted
    16 rpm to low to check oxygen sensor test or fuel control error
    17 cfi fuel control system fault or rich/lean condition indicated
    18 ignition diagnostic monitor (IDM) circuit failure
    19 cylinder identification (CID) sensor input failure
    21 engine coolant temperature (ECT) out of self-test range
    22 manifold absolute pressure (MAP) sensor circuit out of range
    23 throttle positioner sensor out of self-test range
    24 air charge temperature (ACT) sensor out of self-test range
    25 knock not sensed during dynamic response test
    26 transmission fluid temperature out of self-test range
    28 loss of primary tach, right side
    29 insufficient input from vehicle speed sensor
    31 egr positioner sensor below minimum voltage
    32 egr positioner sensor below closed limit
    33 throttle positioner sensor noisy/harsh on line
    34 egr valve circuit out of self-test range
    35 egr valve circuit above maximum voltage
    38 idle track switch circuit open
    39 axod torque converter or bypass clutch not applying properly
    41 oxygen sensor circuit indicates system always lean
    42 oxygen sensor circuit indicates system always rich
    43 oxygen sensor out of self-test range
    44 air injection control system failure
    45 coil 1 primary circuit failure
    46 coil primary circuit failure
    47 4X4 switch is closed or oxygen sensor failure
    48 coil primary circuit failure
    49 electronic transmission shift error
    51 engine coolant temperature sensor circuit open
    52 power steering pressure switch circuit open
    53 throttle position circuit above maximum voltage
    54 air charge temperature circuit open
    55 key power input to processor open circuit
    56 mass air flow circuit above maximum voltage
    57 axod circuit failure
    58 idle tracking switch circuit fault
    59 automatic transmission shift error
    61 engine coolant temperature circuit grounded
    62 converter clutch error
    63 throttle positioner circuit below minimum voltage
    64 air charge temperature circuit grounded
    65 charging system
    over voltage
    66 mass air flow sensor circuit below minimum voltage
    67 neutral/drive switch circuit open
    68 transmission fluid temperature over temperature range69 transmission shift error
    70 data circuit communication link circuit failure
    71 message center circuit circuit failure
    72 insufficient manifold absolute pressure (MAP) change during dynamic response test
    73 insufficient throttle positioner (TPS) change during dynamic response test
    74 brake on/off (BOO) circuit open
    75 brake on/off (BOO) circuit closed
    76 insufficient air flow output change during test
    77 brief wide open throttle not sensed during test
    78 power interrupt detected
    79 a/c on/defrost on during self test
    81 map has not changed normally
    82 super charger bypass circuit failure
    83 OIC-low speed fuel pump relay circuit failure
    84 egr vacuum regulator (EVR) circuit failure
    85 canister purge circuit failure
    86 shift solenoid circuit failure
    87 fuel pump circuit failure
    88 electro drive fan circuit failure
    89 transmission solenoid circuit failure
    91 no oxygen sensor switching detected
    92 shift solenoid circuit failure
    93 throttle positioner sensor input low
    94 torque converter clutch solenoid circuit failure
    95 fuel pump secondary circuit failure
    96 fuel pump secondary circuit failure
    97 transmission indicator circuit failure
    98 electronic pressure control circuit failure
    99 eec has not learned to control idle


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  • Master
  • 3,917 Answers


The problem is not ignition timing, nor the carburator. (at least not directly)

At full operating temperature, and under engine load, the EGR system in conjunction with the feedback system of the carb will automatically adjust the fuel mixture.

Check for vaccum leaks and repair as required... Additionally,even the slightest vaccum leak will cause problems with the feedback system. Be sure to check the Thermostatic Valve for proper operation. (The Thermo Valve is located in coolant thermostat well in the intake manifold.)

Also, the Bosch Platinum plugs are a very good choice as long as they are the correct heat range for the application...

Some symptoms I've corrected in
the past may be the same as the one you describe.

When the engine wasn't up to temperature, the truck would cough and darn near
flame-out when going up a hill, like a freeway on ramp.

Also if you want to get rid of the spark plug way get rid of those spark plugs (too much advertising hype) don't use
anything fancy have the coil tested for voltage output get a
timing light and check for vacuum and centrifugal advance of the spark
use a vacuum gauge and check for low vacuum get a long tube and a
propane tank and artificially richen the fuel mixture if the problem goes
away when rich see if the accelerator pump circuit in the carb is ok .

Thanks for contacting Fixya.

Posted on Jun 15, 2009


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