Jimbo via CarKB.com

My 2000 focus zx3 standard started missing when I would first take off or
right after I would shift gears (under a load). It acts like the electrical
system is shutting it down. At first I thought it was the throttle position
sensor because it would act up (stumble) when I would give it the gas. If I
move the gas peddle slowly it will rev up fine. The speedometer bounces
around crazy when it acts up and I can hear a popping sound in the speakers.
I had a new sound system and alarm system installed about two weeks prior to
my problem. I brough it to the ford dealership and they could not fix it and
suggested that I bring it back to the audio installer. I did this and they
rechecked all the ground wiring and said that they use their own grounds and
everything looks good on their end. No check engine light is on. I pulled
the wire off the TPS to see if it would run any different and it did so I
guess its ok. The check engine light did come on at this point and autozone
confimed that when they plugged in. I bought a new battery (675amp), plugs
and wires, and fuel filter and it has helped a lot but the problem is still
there. Should I replace the coil and TPS anyway? One autozone employee told
me that I needed a 1000amp battery because of the ampifiers in my car. Any
truth to that? Also I just noticed that when the engine is under a load it
pings and maybe a knock sensor is shutting things down. Anyone have any
thoughts.

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Dave Gower

"Jimbo via CarKB.com" <u16377@uwe> wrote in message
news:5864a7133f263@uwe...
> My 2000 focus zx3 standard started missing when I would first take off or
> right after I would shift gears (under a load). It acts like the
> electrical
> system is shutting it down. At first I thought it was the throttle
> position
> sensor because it would act up (stumble) when I would give it the gas. If
> I
> move the gas peddle slowly it will rev up fine. The speedometer bounces
> around crazy when it acts up and I can hear a popping sound in the
> speakers.

The only thing that occurs to me is a problem with the voltage
regulator/alternator. To check that you would need to mount a voltmeter and
go for a drive.

If that's not it, I suggest you post it to a bigger, more generally
technical newsgroup such as rec.autos.tech or alt.autos.ford.

Jimbo via CarKB.com

I did have the voltage regulator/alternator checked and it's ok. I will post
to a larger group. Thanks.

Dave Gower wrote:
>> My 2000 focus zx3 standard started missing when I would first take off or
>> right after I would shift gears (under a load). It acts like the
>[quoted text clipped - 6 lines]
>> around crazy when it acts up and I can hear a popping sound in the
>> speakers.
>
>The only thing that occurs to me is a problem with the voltage
>regulator/alternator. To check that you would need to mount a voltmeter and
>go for a drive.
>
>If that's not it, I suggest you post it to a bigger, more generally
>technical newsgroup such as rec.autos.tech or alt.autos.ford.

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Mal484T

This problem can appear when in second or third pulling away (Fast
Acceleration), possible fault in engine management module, not advancing
the spark enough under acceleration causing a stutter / missfire.
Hope this helps.

Mal484T

This problem can appear when in second or third pulling away (Fast
Acceleration), possible fault in engine management module, not advancing
the spark enough under acceleration causing a stutter / missfire.
Hope this helps.