20 Most Recent 1997 Mercury Mystique Questions & Answers

How hot does the engine get in degrees F ? Some radiator fans won't turn on till about 220 degrees F ? Knowing the actual temp would help.
Is your coolant boiling over or anything? Sometimes when cooling system is opened, it might get air in the system?

1997 Mercury... | Answered on Feb 10, 2018

Well Jerome,

That's a good name for a car in such a dilemma...
Mystique... 1997 (posted both 4 & 6 cylinder parts).

Since the lifting is the hard part... it would be better to take it to your cooperative PARTS HOUSE FOR TESTING..

you might GET to do everything at least twice (bad idea).

If you have the bolts.. the job gets a lot simpler.
Generally you have a Huge (POS +) wire that connects
from the battery DIRECTLY to the SOLENOID.

First thing:
You want to do is DISCONNECT the GROUND
at the BATTERY (NEGATIVE (-)) terminal.
(Always first off & last on... always... safety first).

Connect the "S" lead to the "S" terminal
(battery KEY switched ON only in START Position) ...

If you don't own (or want to buy) a manual
go to BBB Industries and register to use their
wiring DIAGRAMS & TSBs
(See very bottom: Technical Service Bulletins).

1997 MERCURY MYSTIQUE 2 0L L4 Starter Motor RockAuto

1997 MERCURY MYSTIQUE 2 5L V6 Starter Motor RockAuto

BBB Industries Premium Alternators Starters Power Steering Products

1997 Mercury... | Answered on Feb 06, 2017

Right where the shift cable attaches to tranny aka neutral safety switch

1997 Mercury... | Answered on Feb 06, 2017

In most cases it is a spark plug wire or spark plug. But in higher milage cars it can end up being a cracked exhaust valve or broken compression ring. You need to identified which cylinder it is and test for spark, compression and if that is inconclusive check the fuel injector for fuel delivery. If this is beyond your comfort level a shop can do this for 1 hours diagnosis

1997 Mercury... | Answered on Feb 06, 2017

According to MFR Technical Service Bulletins, the most likely case of the Transmission jerk is a faulty MAF sensor, i.e. entire vacuum system as well as the MAF.
A MAF fault may or may not be strong enough to trigger a DTC but If you do have a check engine light present, run down to the nearest Auto Parts store and ask for an associate to read and print out your trouble codes. Again, according to the MFR, harsh shifting may also be a symptom of:
Torque Converter Clutch (DTC 628 or P0741)
Transmission over temp (DTC 657 or P1783)
Trans Turbine Shaft Speed Sensor (check ohmic values)

Catalytic Issue?
A sulfur smell along with a stall issue is caused by Electronic engine control V, or the Powertrain control module and/or the HEGO sensors. For stall - reprogram PCM.
For stall and smell - replace both HEGO sensors.

No Trouble codes/No check engine light?
In my experience, cleaning the throttle body (especially the small hole near the butterfly valve's resting edge) with carb cleaner, and securing all vacuum leaks is a good first step, Next checkout the EGR system, the EGR valve may be sticking open for a few seconds. Use an inkjet refill syringe connected to the EGR valve via vacuum hose. Pull a quick vacuum. Engine should stumble and then recover quickly when vacuum is relieved. Delayed reactions indicate carbon buildup.

Another quick and cheap check --
Idle air control valve:

turn off engine, disconnect IAC, restart. If no change in rpm at idle, IAC is likely to be faulty

Use an ohm meter to check the solenoid by attaching the positive lead to the VPWR (vehicle power pin) and the negative lead to the IAC pin.
Your resistance reading should be between 7.0 ohms and 13.0 ohms. If your reading is off, your IAC solenoid is bad.

Hope this helps,

MAF Sensor TSB:

Ohmic values for Trans speed sensors:

1997 Mercury... | Answered on Nov 23, 2015


1997 Mercury... | Answered on Jun 18, 2015

it is for bank 2 sensor 2 behind the convertor. The parts place will tell you.

1997 Mercury... | Answered on Jun 18, 2015

gas floater is preset from the manufacturer and when installed in the tank will be reasonably accurate. The hand on the gauge will work properly when you have battery signal from floater and ground. Check to see what's missing.

1997 Mercury... | Answered on May 26, 2015

idle air control valve is bad most likely

1997 Mercury... | Answered on Apr 16, 2015

Off the master cylinder. The front tube controls the rear brakes. And the back one controls the front brakes. Just a note. I don't know which year they started doing this, but, the front right brake goes/ties in to the left rear brakes. left front to right rear. This set up runs off the ABS module to the brakes.

1997 Mercury... | Answered on Mar 01, 2015

Sound like you have air in the system. You need too bleed out all the air. Some times it takes a while cashing it around. Start at your right rear brake, have some pump them up and hold down the pedal , then open your pit valve, after each time check your brake fluid. You will probably get air from it tell the Pearson that is helping you to hold the pedal down until you have check everything. Then when you have solid fluid come out then go to the left side and do the same. Once you have completed the task and theirs no more air the brakes should only take 3 pump of the peddle hold them down and then release them and push them down again the brake pedal should hold .

1997 Mercury... | Answered on Jun 10, 2014

What you would need to do is find out which part is making the problem. By this, I mean the electric solenoids which supply Vacuum to the valve or the EGR valve itself or the EGR ports feeding the exhaust to be recirculated.

Free "check engine light" tests are available at major parts stores like Autozone.

You can test the EGR diaphragm by using Vacuum or by pushing the diaphragm open and putting your finger over the vacuum opening and sealing it off.

You may also have soot in the EGR valve prevent it from closing. Remove and clean the EGR.

1997 Mercury... | Answered on Nov 08, 2013

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