Problems after replacing intake manifold... can anyone help?

A while back, my intake manifold in my 1999 Mustang GT cracked (thanks for
the faulty manifold, ford!) and fluid leaked all over the place. I got it
and a faulty pulley replaced, and now my car is having some weird problems.

When idling, it idles kind of rough, my gauge cluster will dim and get
brighter, most noticably the odometer, and sometimes I will feel rough
clunks which I can't tell where they're coming from. The oil gauge needle
also twitches up and down. When revving the car to 2500 RMP or so, it sounds
pretty abnormal under the hood. I can't quite describe the sound, but it's
like the normal engine sound with a quite noticable whirring sound added in.
Taking off from a stop, the car jerks and leaps and does so all the way up
to around 55mph, where it magically stops. Driving it, the service engine
light came on and flashed for about 1 minute before turning off again.


Does anyone have any clue as to what this could even remotely be? I was
already frustrated because of the manifold, and now more problems seem to be
piling up on top of it. Plus, my Ford dealership is giving me the runaround
about getting my reimbursement.

The service engine soon light is indicating an engine misfire when it is
flashing. A scan of the computer should give you a code for the cylinder or
cyliders that are missing. A lot of things could cause a miss but I would
look at the plugs first. Make sure there is no coolant remaining down in
the spark plug holes from the leaking intake. Make sure the coils and
injectors were plugged back in securely. It is also fairly common for a
coil to fail. Also make sure the coil boots are not damaged. Hope this
helps.
"Erik Hovind" > wrote in message
news:NKsLf.87008$QW2.66532@dukeread08...
>A while back, my intake manifold in my 1999 Mustang GT cracked (thanks for
>the faulty manifold, ford!) and fluid leaked all over the place. I got it
>and a faulty pulley replaced, and now my car is having some weird problems.
>
> When idling, it idles kind of rough, my gauge cluster will dim and get
> brighter, most noticably the odometer, and sometimes I will feel rough
> clunks which I can't tell where they're coming from. The oil gauge needle
> also twitches up and down. When revving the car to 2500 RMP or so, it
> sounds pretty abnormal under the hood. I can't quite describe the sound,
> but it's like the normal engine sound with a quite noticable whirring
> sound added in. Taking off from a stop, the car jerks and leaps and does
> so all the way up to around 55mph, where it magically stops. Driving it,
> the service engine light came on and flashed for about 1 minute before
> turning off again.
>
>
> Does anyone have any clue as to what this could even remotely be? I was
> already frustrated because of the manifold, and now more problems seem to
> be piling up on top of it. Plus, my Ford dealership is giving me the
> runaround about getting my reimbursement.
>

I would check to be sure all of your grounds are properly connected too.

Kate


"Chuck" > wrote in message
news:m6vLf.10178$lR2.7257@trndny01...
: The service engine soon light is indicating an engine misfire when it is
: flashing. A scan of the computer should give you a code for the cylinder
or
: cyliders that are missing. A lot of things could cause a miss but I would
: look at the plugs first. Make sure there is no coolant remaining down in
: the spark plug holes from the leaking intake. Make sure the coils and
: injectors were plugged back in securely. It is also fairly common for a
: coil to fail. Also make sure the coil boots are not damaged. Hope this
: helps.
: "Erik Hovind" > wrote in message
: news:NKsLf.87008$QW2.66532@dukeread08...
: >A while back, my intake manifold in my 1999 Mustang GT cracked (thanks
for
: >the faulty manifold, ford!) and fluid leaked all over the place. I got it
: >and a faulty pulley replaced, and now my car is having some weird
problems.
: >
: > When idling, it idles kind of rough, my gauge cluster will dim and get
: > brighter, most noticably the odometer, and sometimes I will feel rough
: > clunks which I can't tell where they're coming from. The oil gauge
needle
: > also twitches up and down. When revving the car to 2500 RMP or so, it
: > sounds pretty abnormal under the hood. I can't quite describe the sound,
: > but it's like the normal engine sound with a quite noticable whirring
: > sound added in. Taking off from a stop, the car jerks and leaps and does
: > so all the way up to around 55mph, where it magically stops. Driving it,
: > the service engine light came on and flashed for about 1 minute before
: > turning off again.
: >
: >
: > Does anyone have any clue as to what this could even remotely be? I was
: > already frustrated because of the manifold, and now more problems seem
to
: > be piling up on top of it. Plus, my Ford dealership is giving me the
: > runaround about getting my reimbursement.
: >
:
:

It ended up being plugs + a coil, thanks!


"Erik Hovind" > wrote in message
news:NKsLf.87008$QW2.66532@dukeread08...
>A while back, my intake manifold in my 1999 Mustang GT cracked (thanks for
>the faulty manifold, ford!) and fluid leaked all over the place. I got it
>and a faulty pulley replaced, and now my car is having some weird problems.
>
> When idling, it idles kind of rough, my gauge cluster will dim and get
> brighter, most noticably the odometer, and sometimes I will feel rough
> clunks which I can't tell where they're coming from. The oil gauge needle
> also twitches up and down. When revving the car to 2500 RMP or so, it
> sounds pretty abnormal under the hood. I can't quite describe the sound,
> but it's like the normal engine sound with a quite noticable whirring
> sound added in. Taking off from a stop, the car jerks and leaps and does
> so all the way up to around 55mph, where it magically stops. Driving it,
> the service engine light came on and flashed for about 1 minute before
> turning off again.
>
>
> Does anyone have any clue as to what this could even remotely be? I was
> already frustrated because of the manifold, and now more problems seem to
> be piling up on top of it. Plus, my Ford dealership is giving me the
> runaround about getting my reimbursement.
>