got a 1999 Mercury Grand Marquis. the car runs fine until you hit the brake or turn on the headlights, which at that point it stalls and dies. what do I do?

Troy Shutt
0

Asked by Troy Jun 10, 2014 at 01:57 AM about the 1999 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

1 Answer

Tracy Hooks
9,335

I take it that there's no "Check Engine" light on? Remove the intake snorkel and clean the Throttle Body plate with Carburetor cleaner, a soft cloth and your finger. If you're careful, you can remove the Throttle Body for cleaning. NO ABRASIVES! You can also remove the two small bolts holding the IAC in place and clean the inside of it as well. Try to move the plunger inside of it while bathing it in carb spray also. Disconnect the battery to reset the computer. Assemble the vehicle, start and run the engine at 2500 RPM for a full minute or two (warm the engine) and allow the car to idle for 2 minutes. Set the brake and allow the car to idle in gear for 2 minutes. With the car in gear and at idle with the brake set, turn on the headlights and AC and let it run for 2 minutes. It's typical for the Throttle Body and IAC to become sludged over time and require cleaning.

Your Answer

Related Questions

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 1,690
#2 kbro
kbro
Reputation 1,020
#3 Tom Demyan
Tom Demyan
Reputation 430
View All

Related Models For Sale

Used Ford Crown Victoria"
43 Great Deals out of 1,539 listings starting at $1,695
Used Lincoln Town Car"
115 Great Deals out of 3,073 listings starting at $1,499
Used Chevrolet Impala"
2,049 Great Deals out of 58,261 listings starting at $1,250
Used Ford Mustang"
1,055 Great Deals out of 26,926 listings starting at $1,500
Used Cadillac DeVille"
78 Great Deals out of 3,299 listings starting at $650
Used Ford F-150"
2,062 Great Deals out of 184,528 listings starting at $1,500
Used Toyota Camry"
1,989 Great Deals out of 75,230 listings starting at $1,200
Used Ford Explorer"
1,085 Great Deals out of 45,396 listings starting at $1,499
Used Ford Taurus"
612 Great Deals out of 19,655 listings starting at $899.99
Used Toyota Avalon"
368 Great Deals out of 18,609 listings starting at $1,500
Used Chevrolet Tahoe"
943 Great Deals out of 31,710 listings starting at $1,795

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
4 Great Deals out of 42 listings starting at $11,995
2010 Mercury Grand Marquis For Sale
4 Great Deals out of 111 listings starting at $10,995
2009 Mercury Grand Marquis For Sale
6 Great Deals out of 164 listings starting at $8,990
2008 Mercury Grand Marquis For Sale
23 Great Deals out of 322 listings starting at $3,999
2007 Mercury Grand Marquis For Sale
10 Great Deals out of 237 listings starting at $4,998