Mercury Marquis Engine Idle High

Lowest Idle Speed Obtainable Is 800 To 850 Rpm Hot In Neutral. Idle Speed At Rest In Gear 650 To 700. Idle Speed Always Increases When...

99 Grand Marquis Ls Stayed High Idled After Throttle Body Cleaned.

In The Fall I Had A Heater Core Replaced And Since Then When The Heater Is On, The Car Revs Up. Recently When It Snowed, I Let Off The...

I Checked The Vac Lines And Thy Look Good, What Things Should I Look For And How Do I Check Them?

Idle Okay In Gear. What Is Causing This?

I Have A 1989 Mercury Grand Marquis With A 5.0 In It With Tbi.i Started It The Other Day And It Seemed To Warm Up Normal Then It Started To...

After My Car Heats Up After Driving It Arround For A Little It Starts Trying To Take Of At Stop Lights And When Im Driving The Car Will Also...