Watch as I repair a coolant leak that is leading to a misfile and rough idle on my 1999 Mercury Grand Marquis. The initial symptoms were the check engine lig…
Watch as I repair a coolant leak that is leading to a misfile and rough idle on my 1999 Mercury Grand Marquis. The initial symptoms were the check engine lig…
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I have a grand marquis n its miss firing I change all the plugs and coils
on it even change the fuel injector.. in it still miss firing I don’t have
a coolant leak in its not wet inside the spark plug.. and the scanner say
my 4 5 8 is miss firing n plus oxygen sensor but the car don’t have
Cadillac converter on it .. could anybody help me out.. n it don’t have…
only 146000 on it I still drive it ever day…
same problem, but my mechanics teacher an about 3 other mechanics all said
Blown Head Gasket. idk yet. did u ever solve your problem
Thanks man.
Another way I remove coolant from spark plug holes is sticking a sheet of
good quality paper towel down there (like Bounty)….waiting 5-10 minutes
for the paper towel to soak up the coolant then carefully pull it out with
a needle nose pliers.
Take the plug out and let it drain into the cylinder. After this i ended up
having to put a new intake manifold gasket set on. Hope yours is a leak
thats just a hose that goes to the heater core.
For those with this problem, take off coil, use an air hose to blow down
into the hole.this will blow any pooled liquids out instead of draining
into the cylinder.
After this i ended up having to put a new intake manifold gasket set on. A
compression test should indicate if the headgasket if bad.
After removeing plug with coolant around it, let drain n hole b for replace
plug crank eng to blow out coolant do not let drain n with out cranking it
over u can compress air but not coolant u will bend rod or bust piston
please dont replace plug wit coolant n eng just crank it with plug out it
will push out coolant
I was interested in buying a 99 GM.. watched this video.. when I checked
out car, CHECK ENGINE light was lit… while driving it, I exerienced the
flashing light, and a miss.. got back to dealership, top of engine block
was full of coolant.. their mechanic verified my diagnosis.. blown intake
manifold… $500 repair. this video saved me a chunk of money.. sad thing
is, the car was in beautiful cndition.
If you need to replace the intake manifold due to a leak from a small crack
you can also try using JB weld.obviously replacing is best.
i have the same problem i replace the manifold gaskets but i get misfire on
5 ill check the sparkplug tomorrow
I wouldn’t recommend letting the coolant into the cylinder, if enough of it
gets in there you could cause damage when you start the car. When I was
working this issue I put down some paper towels to absorb as much coolant
as I could. I then removed the spark plug, pulled the fuel pump relay, then
cranked the engine and had some more coolant spit up and out of the
cylinder.
gooooooooooooooooooooooooooood 🙂
i just have the exactly same problem in a 2001 marquiz . a missfire problem
. and today i saw the coolant level was very low. to me looks like the same
problem. now my question is. if i repair the leak and the spark pug hole is
full of coolant fluid. can i just let that fluid burn out by ksit self whit
out takeing the spark plug off?? thanks