SOURCE: 1992 mercury topaz
I had the same problem. It was the idle air control valve. It sits on top of the intake just downstream from the throttle. There's a valve rod inside that gets worn over time and starts to stick. If that's what is causing your problem, you need to replace the unit.
SOURCE: need stereo wiring codes for 1992 mercury topaz
1991-92 Mercury Topaz Stereo Wiring
Constant 12V+
Green/Yellow
Switched 12V+
Yellow/Black
Ground
Red/Black
Illumination
n/a
Dimmer
Blue/Red
Antenna
Right Front
Front Speakers
6 1/2" Doors
Left Front (+)
Orange/Green
Left Front (-)
Black/White
Right Front (+)
White/Green
Right Front (-)
Black/White
Rear Speakers
6" x 9" Rear Deck
Left Rear (+)
Pink/Green
Left Rear (-)
Pink/Blue
Right Rear (+)
Pink/Blue
Right Rear (-)
Green/Orange
Robert
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SOURCE: fuse diagram for 1992 Mercury Topaz
I have the manuel for the fuses. It`s for a 1992 mercury topaz. If you haven`t found one yet, if you email me I can scan it and get it too you. my e-mail is [email protected]
SOURCE: oil leaking in front of my engine above the oil filter. '92 mercury topaz GS, 2.3 4 cyl
possibly the oil pressure sending unit- looks like a small spark plug screwed into the engine with one wire going to it
SOURCE: Where is the fuel pump relay located on a 1992 Mercury topaz
the fuel pump relay is located on the left shock tower in the engine compartment in a black box 6x4x1 inches. there are other relays inside the same box which is actually called the ccrm or constant contorl relay module, there should be a double connector with 20 to 26 wires in it, hard to miss.
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