Question about 1992 Mercury Topaz
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.
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... http://www.sparkplugs.com/results_app.asp?productTypeID=1&AAIA=1096376
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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Posted on Jan 02, 2017
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