1986 mercury grand marquis 5.0 has a problem starting.What can possibly be wrong?

virgosa
10

Asked by virgosa May 20, 2013 at 06:46 PM about the 1986 Mercury Grand Marquis

Question type: Maintenance & Repair

Only has problem in warm temperatures.1986 Mercury Grand Marquis 5.0 has a problem starting. After it is warmed up and turned off for 10 to 15 minutes fuel punp operates but, no fuel to engine. Car will eventually start after a few more minutes. Car has new fuel punp and filter with full tank of gas or less. What can possibly be wrong?

10 Answers

judge_roy
Not Active

you must get your diagnostic trouble codes read, have manny moe or jack come out and scan the car, or do it yourself with your own scanner-

virgosa
10

Thanks, will have to wait until it isn't starting in the drive way.

judge_roy
Not Active

no check engine light?

virgosa
10

No check lites. Engine cranks, fuel pump works but no fuel to engine. Outside temperature 85 degrees. Drove home earlier, turned car off and waited 5 seconds, car started easily. Half hour later the car wouldn't start. Fuel pump working but, no fuel to engine. Five minutes later car starts easily.

1 out of 1 people think this is helpful.
judge_roy
Not Active

it is temperature related...no...therefore am going to suggest an ambient air temperature sensor....yes they exist~

virgosa
10

Thanks, I'll check it out. Will get back when I'm sure of the solution.

judge_roy
Not Active

if it has fuel injection it need to know the ambient temperature, if it is a carb, there is heat-riser and stove-kit~

Michael Tutty
4,805

You have the fuel injected 302 in this car. If the pump is kicking in, but no gas is reaching the engine, there are 2 things I can think of. The first is vapor lock. It is uncommon, but if the fuel line has been replaced, and not routed properly, it can happen that the gas boils off. The second is a defective regulator. It may be closing under certain temperature conditions.

1 out of 1 people think this is helpful.
virgosa
10

Thanks, I will post when I find an answer.

oakland60
0

Have you solved your problem? I have pretty much the same problem, but mine acts like yours in hot or cold weather.

Your Answer

Add photo

Related Questions

Grand Marquis
Looking for a Used Grand Marquis in your area?
CarGurus has 3,298 nationwide Grand Marquis listings starting at $1,495.
ZIP:

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 2,060
#2 kbro
kbro
Reputation 1,130
#3 Tom Demyan
Tom Demyan
Reputation 470
View All

Related Models For Sale

Used Ford Crown Victoria"
27 Great Deals out of 1,449 listings starting at $1,750
Used Lincoln Town Car"
112 Great Deals out of 2,919 listings starting at $1,350
Used Chevrolet Impala"
1,953 Great Deals out of 64,579 listings starting at $1,100
Used Dodge Charger"
548 Great Deals out of 28,214 listings starting at $3,999
Used Ford Mustang"
939 Great Deals out of 28,057 listings starting at $1,500
Used Ford F-150"
2,934 Great Deals out of 154,940 listings starting at $1,500
Used Ford Taurus"
594 Great Deals out of 19,055 listings starting at $1,600
Used Buick LeSabre"
93 Great Deals out of 3,164 listings starting at $1,200
Used Cadillac DeVille"
61 Great Deals out of 3,012 listings starting at $1,750
Used Honda Accord"
1,237 Great Deals out of 69,469 listings starting at $500

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
40 listings starting at $9,500
2010 Mercury Grand Marquis For Sale
8 Great Deals out of 127 listings starting at $10,787
2009 Mercury Grand Marquis For Sale
13 Great Deals out of 176 listings starting at $6,932
2008 Mercury Grand Marquis For Sale
16 Great Deals out of 268 listings starting at $5,862
2007 Mercury Grand Marquis For Sale
9 Great Deals out of 213 listings starting at $1,495