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kevino

Roseville, CA

#1 Jun 13, 2007
I have a 01 focus,awhile back it started running rough and then stalled every once in awhile.I replaced the fuel filter and everything seemed to be fine.I was drving home today(30mi)in 100 degree heat.All was good until I stoped by the store.When I came out and started it,it kept stalling.Now it is evening time and it starts and runs fine.This has happened before but dosent last.
Robb

United States

#2 Jul 8, 2007
kevino wrote:
I have a 01 focus,awhile back it started running rough and then stalled every once in awhile.I replaced the fuel filter and everything seemed to be fine.I was drving home today(30mi)in 100 degree heat.All was good until I stoped by the store.When I came out and started it,it kept stalling.Now it is evening time and it starts and runs fine.This has happened before but dosent last.
This started happening to my 2002 Focus today. It is 95 degrees today, the warmest day of the summer. After stopping at the store for 30 minutes I came out and it kept shutting off whenever I came to a stop (at low engine rpm's). It must be something related to idle conditions and hot outside temperatures. Did you find the problem with yours?

Robb
Candace

Chilliwack, Canada

#3 Jul 12, 2007
Robb wrote:
<quoted text>
This started happening to my 2002 Focus today. It is 95 degrees today, the warmest day of the summer. After stopping at the store for 30 minutes I came out and it kept shutting off whenever I came to a stop (at low engine rpm's). It must be something related to idle conditions and hot outside temperatures. Did you find the problem with yours?
Robb
I too have a 2002 Focus and this has happened to me on 4 seperate occassions - once in 2005, once in 2006 and then again in May of 2007 and then yesterday. All were in days of high heat. I am desperately trying to figure out what is wrong as I don't want to get trapped with my 4 years old in the car. I spoke to a mechanic in May and he told me that unless the car was malfunctioning at that moment, he couldn't help me. The car gives no indication (no lights on dash) that anything is wrong. It simply begins to lose power, studders when given gas and then stalls. Once this occurs the car will not run until it cools. Once cool, the car runs fine. Did either of yu find an answer to this yet?
Kris

Bellmore, NY

#4 Jul 25, 2007
HI

I got the same problem. I have when to five different repair shops and heard the same answer we can not help you because the car is now running fine. I also found out this does not show up on a computer as a problem. The computer on a Focus can record an problem for 40 cycles. I find that if you lift the hood and open the fuse box in the engine compartment and let is cool for about 5-20 mins the car will start. I heard from one part parts place that it might be the relay for the fuel pump. Before I start buying and removing and replacing parts does any really know what the problem is?

Kris
Robb

Brookfield, WI

#5 Aug 1, 2007
My stalling problem occurred again over the weekend while driving to Detroit. Really not a good thing when in heavy traffic! I replaced the IAC valve/motor. I haven't had the problem since but haven't really tested it in 90+ degree temps with the a/c running (the conditions that if stalls in). Today is going to be really hot. I will give it a good test and let you know how it goes.
Kris

Bellmore, NY

#6 Aug 1, 2007
Robb

Please let me know your outcome. I about to pull my hair out with this problem.
Robb

Brookfield, WI

#7 Aug 6, 2007
Have not had the stalling problem reoccur yet, but still haven't tested it to my satisfaction. Here is some more info. I put some hot air on the IAC that I took out and energized the coil with a 12V battery. As it got hotter the movement of the valve plunger became more sluggish. Someone suggested carbon build-up can cause resistance to the plunger movement. Before you replace your IAC you might try some carbon cleaner down the throttle body. The IAC is not directly in line with air flow so I don't know how effective the cleaner will be.
joe

Dallas, TX

#8 Aug 9, 2007
i have a 2003 focus with the same problem.
the conclusion i've come to is that it's an electrical problem probably a relay. The car runs fine until it's time for the cooling fans to kick in that's when it stalls.Letting it cool down for a couple of minutes works until it heats up again especially in hot weather.
Dave Manchester England

Sheffield, UK

#9 Aug 28, 2007
I have a similar problem with my 2002 1.8 TDi Focus diesel, though not only when it's hot, just when it's been running on the motorway for an hour or so. I had to abandon my car on holiday in the alps because I couldn't drive the 800 miles home without it stalling every hour or so. Both a French garage and my dealer back home couldn't find the problem. I now limit myself to short drives. Not practical for my lifestyle!!!
Kris

Bellmore, NY

#10 Aug 31, 2007
Hi

I changes the fuel pump relay and still have the same problem. Anybody got any ideas?
jeremy

Gloucester, VA

#11 Sep 3, 2007
i dont know if you people are still trying to fix this problem but i am a mechanic and i also own a 02 ford focus. i have had this problem once and it was the mass air flow sensor however i got mine wet from cleaning the engine. there is also one more main sensor that can cause the condtion and it is the air intake temp sensor which read the air temp coming in the motor and sends a voltage to the computer and if it is bad it will send a wrong voltage in not run properly. if the iac valve is bad the easy way to test this is when the car wont start give it some gas if it starts to run and stay running with you foot on the gas and dies when you let go then this is bad. if the mass air flow sensor is bad when it wont start dissconnect the sensor which is located wright beside the air box inline with the air flow and dissconnect the wires and it will go into bypass mode and let you get the car to a shop so you are not stranted. and i did use the scan tool to check my computer and eventhough the check engine light is not on the sensor can still not produse the right voltage but be good enough not to set the light and any mechaic can sill tell that even when the problem had passed hope this helps if people are still reading this
Kris

Bellmore, NY

#12 Sep 7, 2007
Hi Jeremy

Thank you for the information. I will check it out with my mechanic and get back to you.
Lenny

Oceanside, CA

#13 Sep 17, 2007
I have a Focus 2003 2.3 liter PZEV engine. For the past couple of weeks, my engine light has been on, and the engine runs rough and sometimes stalls when it is idling. I had a mechanic friend do a scan and he came up with the following codes.

PO 171
PO 316
P 2195

Jeremy, or anyone that might know, do you know what the last code is? My friend found the first two codes in the book, but P 2195 is missing.
Michael

Rockford, IL

#14 Sep 26, 2007
i have a 2001 ford focus ZX3 DOHC and when i go to start it first time of the day it will idle for a few then die and wont fire after that until i crank the motor for 5-10 minutes steady with the gas floored, i had the ecm reprogrammed, new throttle body, throttle body sensor, new O2 sensors, and now the shop is talking about replacing the injectors, but after reading what i have here thats not going to fix it either
Dan

Atlanta, GA

#15 Oct 2, 2007
My daughters 2000 Focus had a similar problem. It surged a little for several weeks, then one day it started bogging down off idle. It would start just fine, but as soon as you push the accelerator pedal down, it would bog down. I changed the fuel filter because it acted like it wasn't getting enough fuel, but it didn't help. There was, however a bunch of black crap that came out of the old filter. Still suspecting a fuel problem, I decided to check the fuel pressure at the fuel rail, only to find that they eliminated the fitting to hook up a guage. My car hadn't had the fuel pump/control module replaced yet, so I took it to Ford to get it done. They replaced it no charge, but it still wouldn't run right. After paying $75 for a diagnostic, they said my ignition coil was bad. Sure enough, after replacing it, it now runs better than ever. Hope this helps.
Bill H

Toronto, Canada

#16 Oct 2, 2007
My 2002 Ford Focus ZTW wagon has the problem of running fine for a 1hr drive and when you turn the car off and try to restart it it stalls out on a warm day. If I keep my foot on the gas I can keep the car running and if I use my left foot to apply the brake while keeping my right foot lightly on the gas I can drive the car. But this problem corrects it's self usually in a half hour or if I let the car sit for while. I have had this problem happen to me around 5 times now. Is there any way to test the air intake temp sensor and see if this is the problem? Thanks for your help.
jeremy wrote:
i dont know if you people are still trying to fix this problem but i am a mechanic and i also own a 02 ford focus. i have had this problem once and it was the mass air flow sensor however i got mine wet from cleaning the engine. there is also one more main sensor that can cause the condtion and it is the air intake temp sensor which read the air temp coming in the motor and sends a voltage to the computer and if it is bad it will send a wrong voltage in not run properly. if the iac valve is bad the easy way to test this is when the car wont start give it some gas if it starts to run and stay running with you foot on the gas and dies when you let go then this is bad. if the mass air flow sensor is bad when it wont start dissconnect the sensor which is located wright beside the air box inline with the air flow and dissconnect the wires and it will go into bypass mode and let you get the car to a shop so you are not stranted. and i did use the scan tool to check my computer and eventhough the check engine light is not on the sensor can still not produse the right voltage but be good enough not to set the light and any mechaic can sill tell that even when the problem had passed hope this helps if people are still reading this
Michael

Rockford, IL

#17 Oct 2, 2007
well just got my car back and it was the fuel pressure regulator sensor, it now is running fine
Jeff

Chatsworth, GA

#18 Oct 7, 2007
My 2000 Ford Focus ZX3 has several mechanics confounded.

About 40% of the time it runs fine.

About 50% of the time it starts up fine, and then a few minutes after I leave the house and hit 40-50 mph, the car goes dead. When I push on the gas, there is no response and I have to coast to a stop. When I then restart the car (after 10-20 tries), the car shakes violently and I have to ride the clutch at high rpm to make it back home.

The remaining 10% of the time, the car shakes and sputters while trying to start.

The air conditioner has been on at all times.

Lately, I have the fuel pump and filter, plugs and wires, and a vacuum hose replaced. The air-intake system has also been serviced. About 8 months ago I also had a temperature sensor replaced.

My mechanic would like to replace the computer as a next step, but that is an expensive next step with no guarantee that it will work.

Any suggestions would be greatly appreciated.
Jeff

Chatsworth, GA

#19 Oct 7, 2007
I should have added that no codes appear when my mechanic connects the car to his diagnostic computer.
Thanks.
Steve

Paterson, NJ

#20 Oct 28, 2007
Jeff wrote:
I should have added that no codes appear when my mechanic connects the car to his diagnostic computer.
Thanks.
I had the same problem on my 202 Ford Focus. The problem turned out to be a connector to I beleive, the distributor cap? It is were the wires for the spark plugs go in. A mechanic found that one of the wires in this connector broke. Causing a loss of power to the engine.

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