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Old 09-02-2011, 10:06 PM   #1
nytek
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Cool 2000 Ford Focus ZTS stalling while driving

My 2000 Ford Focus is stalling while driving. It mostly does it when it is downshifting but I don't think that matters. I took it to a mechanic and he told me it was the water pump. I did some research and I can't find any information saying that it could cause it. This mechanic is pretty lefit IMO, I took it there about a month ago for a problem I was having with the car and he fixed it in 2 hours when another mechanic couldn't figure it out.

My question is, is he right? Can a water pump cause the car to die/stall while driving?


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Old 09-02-2011, 11:33 PM   #2
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Quote:
Originally Posted by nytek View Post
My question is, is he right? Can a water pump cause the car to die/stall while driving?
Doubt it. Unless the pump was seized so badly you'd hear/feel/smell it.

For stumbling/rough idling/stalling issues when coming to a stop, check for a vacuum leak after the MAF. Pay particular attention to the PCV hose. If it simply cuts out intermittently while cruising, you usually look for an electrical problem.
So, how does it stall and what do you mean by "while driving"?
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Old 09-03-2011, 11:49 AM   #3
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X2 on the above, with the addition of possible IAC (idle air control) issues....

If the bearings are going on the pump, there would PROBABLY be some leakage as well, if it's bad enough to put an extra load on the engine that would cause it to stall between shifts ( when there's no OTHER load on the engine).

Get back to us with more info. - the guy might be right! - we just can't guess for sure without more diagnostic info..

Luck!
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Old 09-03-2011, 12:29 PM   #4
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Thanks for the replies!

About the stalling issue, I cannot really pinpoint where exactly it is happening. It is definitely happening when I'm driving. It's happened a couple times when I was making a turn and when the car is downshifting. The temperature gauge seems fine, never goes pass half way. I've done a lot of work on the car and these are the things that I've replaced since I've had the car.

Alternator
Battery
PVC Value and connector (broke while trying to get to PVC value)
Fuel filter
Ignition Coils (I think one was bad, that is what the mechanic fixed when another mechanic couldn't)
Fuel Pressure Regulator
Mass Air Flow Sensor
Vacuum Harness
Spark plugs and wires

I think that is about it, it's really given me trouble since I've got it but I've learned a lot fixing all of it. (First car fixing myself, mostly)

I really hope this helps because I couldn't really use a non-stalling car. lol
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Old 09-03-2011, 12:30 PM   #5
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By the way

I've only had the car for about 5 months. :(
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Old 09-03-2011, 01:59 PM   #6
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Lets see, AFAIK, your car doesn't HAVE a "fuel pressure regulator", maybe someone called another part by the wrong name....

And "vacuum harness" leaves me wondering exactly WHAT was really replaced there as well...

Otherwise it sounds like the "normal" list of issues that hadn't been addressed by the prev. owner, so you were playing "catch up" on some typical maint. and older vehicle wear items...

It SOUNDS like you have an automatic trans. version (specifying which tranny helps!).

The next question would be whether the car maintains a steady idle speed when shifted into gear at a stop. If so, the IAC is working properly, at least at idle RPM where problems with it USUALLY first surface....

There is a "sticky" on using the odo to check engine functions (including rpm) if your car DOESN'T have a tach for some reason... (American manufacturers are funny that way, automatics usually have one, and manuals where you really need it, like MY ZTS, didn't come with one...).

Let us know what the results of that check are, so we can guess further...

luck!

Last edited by sailor; 09-03-2011 at 01:59 PM. Reason: sp.
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Old 09-03-2011, 03:27 PM   #7
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The cars idle speed drops sometimes. But, I thought that was the transmission. It is slipping but I put some lucas in it and it helped a little. I was wondering what you all think about dealing with the transmission.

Yes, the transmission is automatic. I don't know what tranny it is, but how would I find out?
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Old 09-03-2011, 04:23 PM   #8
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It's a 4F27E auto. It was the only ATX fitted to your year. As sailor pointed out, the idle speed should not drop when a gear is selected.
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Old 09-03-2011, 05:31 PM   #9
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?

Quote:
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It's a 4F27E auto. It was the only ATX fitted to your year. As sailor pointed out, the idle speed should not drop when a gear is selected.
Actually, I was talking about the RPM's dropping randomly. But, it doesn't happen when it stalls. The stall is every time I drive it it will stall. Usually after driving for 20 minutes.
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Old 09-03-2011, 06:20 PM   #10
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Ok, so maybe a bit of clarification is required. A stall - in my books anyway - usually occurs at idle or very low speed. It's the inability of the engine to maintain a steady idle. So, for example, you come to a stop sign, brake, the car rpms drop below "normal" and the engine eventually sputters and dies.

If the engine is simply stopping when travelling at speed without warning - say, when you're cruising at a constant 30 mph going straight - then I'd call that "cutting out". Most of the time, depending on how abrupt it is, that's probably electrical. (A fuel issue would usually give some warning signs like engine hesitation or stuttering.)

Hope that helps. Which circumstance applies to you?
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