Codes fired after inoticed issues


Asked by Aug 01, 2016 at 12:12 PM about the 1999 Ford Expedition 4 Dr XLT 4WD SUV

Question type: Maintenance & Repair

I was driving one day when out of nowhere I
started leaking coolant I tore the top of the intake
off the engine and replaced a line that seem to be
recirculating coolant around the engine. However I
thought at the time this was a bleeder valve for
coolant because no one was found. So I use rubber
hosing and close off the little line recirculating the
coolant back around to the back of the engine
under the intake. The car seems to be holding
coolant and drives and runs. After this was
completed I ran test again for codes and mass air
flow and vacuum leak was one of the codes that
popped up along with a bad coil pack 7 for my
spark plugs. I replaced that part in the cold was
gone for the coil pack. I took the mass flow out
and cleaned it. Put it all back together plugged my
battery back on and everything ran and started fine
no engine light nothing. Im driving down the road
and right about 40 miles an hour my truck shifts at
that point it becomes shaky and stunted in my
acceleration. Hitting the gas from a stop causes a
jerk sometimes not always. I noticed that when I
turn overdrive off my car RPMs rise but the stutter
and shaking it is not so noticeable. Where to go
from here I'm assuming the torque control I've also
read up and found that it might be a couple of
other sensors, shift solenoids. With such a wide
spread of what this could be I'm hoping somebody
might be able to point me any more cost
affordable Direction. Last thing little detail that I
feel is important when I accelerate 55 through 60
my check engine light will flash a few times before
remaining lit only after I let off of the gas. I've
looked this up and this says that it could be Many
misfires and multiple cylinders. Even though at the
time I wasn't throwing codes for that.

4 Answers

Bob Beaman

How many miles on it? When were the spark plugs last replaced?


218000 miles and in my time of ownership I have not replace the spark plugs it's been a year.

Bob Beaman

Spark plugs last for about 100,000 miles and maybe they should be replaced. Also many people change all the coils on plug when they start having issues. Not saying this is your problem, but it is a possibility.


I would check for a vaccum leak at the intake, did you replace them while manifold was off?

Your Answer

Add photo

Related Questions


Looking for a Used Expedition in your area?

CarGurus has 21,491 nationwide Expedition listings starting at $2,111.


Search Ford Expedition Questions

Ford Expedition Experts

#1 T_S_T
Reputation 1,170
#2 oldtimer37
Reputation 1,020
#3 lightGear
Reputation 990
View All

Related Models For Sale

Used Ford Explorer"
1,336 Great Deals out of 71,680 listings starting at $300
Used Chevrolet Tahoe"
1,056 Great Deals out of 36,219 listings starting at $1,700
Used Lincoln Navigator"
138 Great Deals out of 6,055 listings starting at $1,999
Used Chevrolet Suburban"
643 Great Deals out of 24,160 listings starting at $1,500
Used Ford F-150"
3,183 Great Deals out of 216,374 listings starting at $1,900
Used GMC Yukon"
546 Great Deals out of 14,659 listings starting at $1,595
Used Cadillac Escalade"
373 Great Deals out of 11,230 listings starting at $2,999
Used Ford Excursion"
17 Great Deals out of 873 listings starting at $3,995
Used GMC Yukon XL"
213 Great Deals out of 6,699 listings starting at $2,575
Used Dodge Durango"
389 Great Deals out of 22,633 listings starting at $1,700
Used Ford F-250 Super Duty"
455 Great Deals out of 42,792 listings starting at $2,250

Used Cars For Sale

2017 Ford Expedition For Sale
6,673 listings starting at $33,021
2016 Ford Expedition For Sale
36 Great Deals out of 2,393 listings starting at $29,990
2015 Ford Expedition For Sale
137 Great Deals out of 2,204 listings starting at $24,900
2014 Ford Expedition For Sale
51 Great Deals out of 821 listings starting at $21,799
2013 Ford Expedition For Sale
61 Great Deals out of 975 listings starting at $11,995