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Old 11-08-2012, 01:21 PM   #1
walker_741
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Can't figure this out to save my life. Literally.

Ok I am new to the forum and have looked high and low throughout it to try and find an answer but I can't. I would appreciate any help as my next step is to junk the car and by a new one, not ideal since I can't really afford the new Focus I want.

I have a 01 ZX3 Zetec DOHC Automatic and since I bought the car two years ago it has had an idle problem that came and went randomly. If this helps at all when I bought the car the airbags had gone off which made the fuel pump cut off, all I did was hit the button and it reset. The car ran fine while under power and fine while at idle expect once in a while. I scanned the CL on car when I first bought it and it gave me P0171 System lean bank 1. Recently the car has become impossible to drive.

Here is a list of parts I have replaced: MAF, Spark Plugs (twice), Plug Wires, IAC, EGR Valve, EGR Valve Solenoid, Motor Mounts and Fuel Filter. I have also checked every vacuum hose on the car and there are no leaks and the hoses are not collapsing. After replacing all of this the rpms race, it accelerates by itself, and stumbles while I am driving. This makes it hard to stop since the rpms are not dropping as they should.

Now for the weird part of this all. One night as I was driving home I hit my brights and the car stumbled and jerked. I tried it again and the same thing happened. It stumbles pretty much whenever I turn on anything electrical in the car. Now yesterday coming home I went to pass a car and while in the throttle (going 40 mph) the car started to stumble and sputter.

I have begun checking the CPS and am wondering if this could lead to this at all or not. If so I have found that with the ignition on there is no power to the CPS connector and the CPS itself is at 401 Ohms. Could anyone possible tell me if this is correct or not.

I don't want to keep throwing money into it and not have the problem get any better but I would love to have my car back. Maybe I'm just not the mechanic I thought I was or something that I haven't checked is wrong.


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Old 11-08-2012, 01:51 PM   #2
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check your pcv hose and there is a pigtail on your alternator that is also a common problem. check those and come back.
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Old 11-08-2012, 03:34 PM   #3
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Open your hatch up, find the black rubber "boot" that goes from the car to the hatch door and peel back the boot exposing the wires and look for any cracks in the wires insulation. Wrap each cracked wire with electrical tape. It has solved many electrical related problems.
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Old 11-08-2012, 04:20 PM   #4
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Quote:
Originally Posted by GreyScorpion View Post
Open your hatch up, find the black rubber "boot" that goes from the car to the hatch door and peel back the boot exposing the wires and look for any cracks in the wires insulation. Wrap each cracked wire with electrical tape. It has solved many electrical related problems.
this is indeed a common issue. But to me it sounds like your throttle position sensor is malfunctioning. it is approximately a $25 part at the local auto parts store.....just pay attention to the way the one on the car is pointing and install the new one exactly the same....if you install it pointing a different direction it will read incorrectly AND damage it.
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Old 11-20-2012, 10:34 AM   #5
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Can someone please tell me where I can buy the TPS only that fits a 2000 Ford Focus 2.0 DOHC Zetec engine, Automatic, without having to purchase the updated Throttle Body.
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Old 11-20-2012, 10:39 AM   #6
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Let me also add I bought a TPS from Advance Auto parts, but it's not responding to it. Should I take a chance, and get one from the junk yard? Getting codes P01122, and P0120.
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Old 11-08-2012, 04:34 PM   #7
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I will second the tps and replacement. My suggestion was based on the headlight and surging going hand in hand.
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Old 11-08-2012, 10:57 PM   #8
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Ok I replaced the pcv valve and the line. The line I bought is a little pinched but not to bad temporary until I got to ford and buy the right one. The car still stumbles and idles high but not as bad as before. Tomorrow I will go get a new tps and see if that helps. Thanks for the tips
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Old 11-08-2012, 11:18 PM   #9
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Check the coil pack for cracks.
I would , if you can, get the alternator checked while you're at it.
Most auto places can check it.
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Old 11-08-2012, 11:26 PM   #10
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Ill check it and see if there are. I looked at it when I replaced the wires it seemed ok but I wasn't looking to hard at it. And I can test the alternator at work (aaa driver) so I will do that also.
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