Question about 2001 Ford Focus

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My focus has been chugging and will stall when it gets hot. Driving on hot days is impossible as well as passing other cars. We scanned it ourselves and the code tells us that it is burning to rich. We replace the o2 sensory and the tempature control sensor and it did not help. I had it E-Tested and it passed with flying colours. When it stalls you would almost think it was out of gas and you can hear it backfire. I can also hear the fuel pump run

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  • Ford Master
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Sounds like a o2 sensor is bad.

Posted on Jun 23, 2017

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  • Ford Master
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O2 sensors do not control fuel mixture that is done by the heated oxygen sensor (HO2S) in the manifold before the cat converter
rich can be from faulty injectors/s leaking injector seals, blocked air filter, problem EVAC system
from your think it is out of gas , I would suspect a EVAC system problem

Posted on Jun 23, 2017

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  • Ford Master
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CODE ???? If you would like help need to know what code ? P0172 ?
Using a scan tool an checking scan data would be the first thing to do , before replacing parts ! That's a rookie move. What are the fuel trims at ? is the PCM adding ,taking away fuel ? Are the O2 sensors switching rich to lean like thier suppose to. Using a better scan tool an looking at data , an freeze frame data .
003 Freeze Frame and Conclusion

009 Testing DCTs
You could have leaking injectors , clogged air filter , bad fuel pressure regulator , mass air flow sensor bad . You wan't fix cars , learn how.

o2 sensory ???? ha ha ha lol . it's O2 sensor Suggest you take it to a qualified repair shop . Because you have no clue .

Posted on Jun 23, 2017

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Posted on Jan 02, 2017

SOURCE: runs fine for a few

it might be the fuel pressure regulator, i have a similar problem with my 95 302. but mine just dies but starts right back up. i was told fuel may be evaporating out of the fuel lines, when it doesnt start the first try i pump the gas pedal 2-3 times and it starts right up.

Posted on Aug 02, 2008

  • 14036 Answers

SOURCE: 98 ford escortLX starts and runs for about 1 min and then stalls

check fuel pressure regulator.+ vacuum lines going to it look see if gas in vacuum line.if so regulator rupture.

Posted on May 03, 2009

co7196
  • 3433 Answers

SOURCE: stalling stuttering after fuel filter change

Air in the fuel filter. there is a fitting you can bleed the fuel system by depressing like a tie valve. Turn ignition on so pump is working and depress the valveon the fuel rail to release the air. Hold untill only fuel comes out. - good luck and no smoking.

Posted on Jun 19, 2009

  • 95 Answers

SOURCE: Taurus SHO wont pass emissions: 95 Taurus SHO

If the fuel regulator is seeping gas, replace it first. There is a good chance the diaphragm has a hole in it and is feeding fuel through the vacuum line directly to the intake, causing extremely rich fuel mixture. (Hence the strong exhaust and burning eyes) As a matter of fact, if you pull the vac line off and turn on the key, I bet fuel sprays out. Be careful not to start a fire on a hot engine. Once you get this repaired, erase the codes and retest. You could find yourself with only one code, maybe even none. I wish you luck. Emissions can make you pull your hair out.

Posted on Sep 16, 2009

mrjfisher
  • 141 Answers

SOURCE: truck stalled out while driving will not start

Not sure about your truck older Fords have 2 fuel pumps 1 in the tank & 1 under cab drivers side. Anytime you change a pump you must change your filter. also check your fuel line if it has been pinched or has a leak pressure will drop

Posted on Jul 14, 2010

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1 Answer

Car starts and stalls


Hey I had a similar problem with my '02 Focus. The problem was the actual wiring into the ignition module. The wire into cylinder 1 and 3 broke (but were very difficult to see) and was giving me codes as well. Pretty common problem in that age of the focus. It made my focus hesitate and chug until the temps came up. I went to the junk yard, found a focus with a rewired module (with a heavier gauge wire), replaced it and magic. Hope that helps

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Replaced iac valve engine will not idle


wow , no year stated. amazing....
which engine? size and gAS or diesel>?
stalls only hot?
is thermostat good and holding 180F or more???????
why gue$$ ?

Stalls have huge causes.
1: the ISC sticks is but 1 of 50 causes (have list, i pass)
misfire is the other
the EFI Tries very very hard to stop stalls, (opens ISC/IAC 100%)
if it can't. it stalls.
why did it stall, lots of ways.
Misfire from too lean or flooding.
EGR stuck open. is #1 all top DOG for stalls.
EGR can stick open, and when it does, it will stall

no the big questions, not ever answered here ever.....>>
can you save the stall with a fast right foot action.?
easy
tad hard.
impossible.
The answer here, can save tons of hard work.

and is the CEL glow key on, in the dash? Check engine light at key on
then stay out driving, NO< why not scan this car.
do not ever ignore this lamp, scan it or spend eternity fixing car.
buy a scan tool, and learn to use it.
learn how sensors. work and how they read.
learn what closed loop is. (if not in CL hot , fix that now)

if the engine drops closed loop, hot, at idle this means
fueling is out of control and idle is only a victim.
check closed loop status hot engine. and win.


here are all the steps 1 by one on a good engine.

this is just a typical 1.6L 16valve SOHC engine.
MAF based injection, here. any motor with maf , like this..
http://www.fixkick.com/ECU/Authority/A_Full_OBD2_scan.html


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get the codes first

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is the CEL check engine light out running? (it comes on stalled, and is normal that)
stalled. engine stall. no year, now that makes this 10x impossible
and even more impossible no engine stated, (displacement or VIN)
F22? 2.3. 2.7? 3.0L?
if in usa, (no loctation stated ) open hood, look up, see tag?
see vacuum EPA map, see engine type? bingo.

so I wall answer in the generic, (ALL CARS gasoline)
fails hot or cold engine, does hot engine reach 180F and hold?
wow, how low was the oil, off end of stick, none?
stalling is caused by over 50+ things. (we do tests to find it fast )
we use tools, do you have tools, or can buy them, or do you just want
endless guessing. here is the path.
#1 stall maker is a stuck open EGR main valve, ignored during the turn up, clean it. make sure it close
in the macro,
1: bad engine, the hot engine can lose compression and stall.
tool1 the $20buck compression guage.
2: bad spark, or timed wrong. gapped plugs wrong, wrong plugs used. bad wires sets, (old dizzy engines) bad COPS newer cars.
check for hot spark at all spark plugs, skip none.
3: bad fueling (too much or not enough
if engine runs perfect and only idle is too low 800 hot is normal
no DTC 300s misfires, then maybe the ISC is just dirty.
we clean the EGR and ISC every time.
if the EGR leaks, the fast right foot can save a stall but is hard.
if the ISC sticks closed, saving the stall is piece of cake, super easy
after all , you are adding the missing air.

does that help,. no, then take it top the man, the ASE man.
The Mechanic.with the ASE patch on his /her sleeve.
no year, ouch.

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1 Answer

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020 Transducers MAP MAF and Fuel
This next video is just for demonstration purposes , ford does it to , same kind of scan data . Use these to veiw sensor out of spec.
Buick Driveability Diagnosis Reading the Data Stream 1987 Not all automotive repair people know how to use this info. correctly >

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get the repair manual from the given link it will help you to fix the problem easily http://toolsnyou.com/

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1 Answer

1998 ford escort won't start; engine won't fire up?


CHECK FOR THE FUEL STRAINER/FILTER! could have been clogged.
check for blockage at the air intake.
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