over heading/high idleing

Asked by Jul 28, 2016 at 12:29 PM about the 1989 Mercury Cougar

Question type: Maintenance & Repair

2 questions.why does my car idle at high RPMs
when overheated? And why doesn't my
transmission want to shift into gear while
driving?

1 Answer

56,575

On some vehicles the computer will speed up the idle by advancing the ignition timing when overheating is indicated by the coolant temperature sensor. If the idle only speeds up with the overheating, I'd consider it normal. - Jim

Your Answer

Add photo

Related Questions

Search Mercury Cougar Questions

Mercury Cougar Experts

#1 lisagayle
lisagayle
Reputation 2,070
#2 Tom Demyan
Tom Demyan
Reputation 660
#3 FordNut
FordNut
Reputation 610
View All

Related Models For Sale

Used Ford Mustang
728 Great Deals out of 38,316 listings starting at $1,750
Used Ford Thunderbird
30 Great Deals out of 1,146 listings starting at $6,995
Used Chevrolet Camaro
660 Great Deals out of 39,300 listings starting at $2,995
Used Ford F-150
3,377 Great Deals out of 203,974 listings starting at $1,273
Used Chevrolet Corvette
348 Great Deals out of 20,235 listings starting at $3,688
Used Mitsubishi Eclipse
37 Great Deals out of 1,526 listings starting at $1,595
Used Mercury Grand Marquis
32 Great Deals out of 2,239 listings starting at $1,500
Used Pontiac Firebird
14 Great Deals out of 814 listings starting at $3,800
Used Honda Accord
1,201 Great Deals out of 78,040 listings starting at $969