93 Rough Idle/ Slow Initial Acceleration
 

Our 93 ford explorer has been a real champ in the last two years that
we have owned it. It has been very well cared for with only 72,000
miles... but lately we have noticed two things. When the car first
starts cold (IE: First start of the day) the car runs fine, but when
put in reverese, will die immediately, and run fine once restarted.
Secondly, (and the biggest issue) is when sitting and idleing (doesnt
matter if its cold or warm) the engine goes up and down from 500-600rpm
which makes the idle pretty rough. Also, when starting from a dead stop
to accelerate, you press the peddle and the car seems to "hesitate" for
a few seconds before finally accelerating. Does anyone have any idea as
to what may be the issue?

93 Rough Idle/ Slow Initial Acceleration
 

Vacuum leak ???


> wrote in message
oups.com...
> Our 93 ford explorer has been a real champ in the last two years that
> we have owned it. It has been very well cared for with only 72,000
> miles... but lately we have noticed two things. When the car first
> starts cold (IE: First start of the day) the car runs fine, but when
> put in reverese, will die immediately, and run fine once restarted.
> Secondly, (and the biggest issue) is when sitting and idleing (doesnt
> matter if its cold or warm) the engine goes up and down from 500-600rpm
> which makes the idle pretty rough. Also, when starting from a dead stop
> to accelerate, you press the peddle and the car seems to "hesitate" for
> a few seconds before finally accelerating. Does anyone have any idea as
> to what may be the issue?
>

93 Rough Idle/ Slow Initial Acceleration
 

"JohanB" > wrote in message
...
> Vacuum leak ???

In addition to the vacuum leak (which seems very likely) you might also try
cleaning the mass air flow sensor and make sure the air filter is clean.

Do you have any smoke when it first starts up? Any coolant loss? Intake
manifold leaks are common on this engine and can cause it to run rough.
This would likely give you white smoke on startup.

>
>
> > wrote in message
> oups.com...
> > Our 93 ford explorer has been a real champ in the last two years that
> > we have owned it. It has been very well cared for with only 72,000
> > miles... but lately we have noticed two things. When the car first
> > starts cold (IE: First start of the day) the car runs fine, but when
> > put in reverese, will die immediately, and run fine once restarted.
> > Secondly, (and the biggest issue) is when sitting and idleing (doesnt
> > matter if its cold or warm) the engine goes up and down from 500-600rpm
> > which makes the idle pretty rough. Also, when starting from a dead stop
> > to accelerate, you press the peddle and the car seems to "hesitate" for
> > a few seconds before finally accelerating. Does anyone have any idea as
> > to what may be the issue?
> >
>
>

93 Rough Idle/ Slow Initial Acceleration
 

On 13 Aug 2006 03:51:22 -0700, wrote:

>Our 93 ford explorer has been a real champ in the last two years that
>we have owned it. It has been very well cared for with only 72,000
>miles... but lately we have noticed two things. When the car first
>starts cold (IE: First start of the day) the car runs fine, but when
>put in reverese, will die immediately, and run fine once restarted.
>Secondly, (and the biggest issue) is when sitting and idleing (doesnt
>matter if its cold or warm) the engine goes up and down from 500-600rpm
>which makes the idle pretty rough. Also, when starting from a dead stop
>to accelerate, you press the peddle and the car seems to "hesitate" for
>a few seconds before finally accelerating. Does anyone have any idea as
>to what may be the issue?

The vacuum leak suggestion is a good one. If that's not it I would
consider a bad throttle position sensor or a bad idle air bypass
valve. Both are inexpensive and easy to replace yourself.