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2005 Ford Focus sudden loss of power and bogging when warm
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sarxworks
Novice
Feb 26, 2023, 10:20 PM
Post #1 of 25
(2266 views)
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2005 Ford Focus sudden loss of power and bogging when warm
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Been having a nightmare of a month with my:
2005 Ford Focus ZX4
2.0L
78k
About a month ago, my car suddenly began bogging down when I was driving on the highway. From the driver side, I hear the engine getting louder or like something is clogged whenever it starts happening. My speed also decreases until the car just jerks and bucks like it’s being starved of something. I had my fuel pump, fuel filter, airbox, and MAF changed. I don’t get any codes or even a CEL.
Any clue what the issue could be? I was thinking it possibly could be a clogged catalytic converter. It only happens when the car warms up.
Video of Problem:
https://youtube.com/shorts/DSqnyCOTDFc?feature=share
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Sidom
Veteran
/ Moderator
Feb 26, 2023, 10:45 PM
Post #2 of 25
(2257 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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It's kind of tough to diagnose going off that sound bite. Kind of sounds like it's hitting a Rev limiter. If the converter was plugged bad enough to bog it down Seems like you get a P0420 code.
What would really help is access to a data stream while the problem is happening. I don't know if you access to scan to or not. It could Even be a case of the transmission slipping. Have you checked the fluid level and the condition. Make sure it's not black and burnt
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sarxworks
Novice
Feb 27, 2023, 6:15 AM
Post #4 of 25
(2228 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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I don't believe my car has a rev limiter. I didn't mod my car in anyway except change the airbox but that was because I thought it would fix the issue.
Wdym by a datastream? Do you mean a scan tool because I can show the data from it.
I also had it checked by a transmission shop where we drove it around and he said the trans seemed fine, it was switching gears flawlessly based on his scan tool. I also already checked the fluid and the trans and everything was alright.
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sarxworks
Novice
Feb 27, 2023, 8:48 AM
Post #6 of 25
(2207 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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Sorry, didn't entirely know that. I would find at odd because sometimes the problem happens when I'm just taking off from a stoplight.
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Hammer Time
Ultimate Carjunky
/ Moderator
Feb 27, 2023, 8:52 AM
Post #7 of 25
(2205 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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I'm not saying that is your problem as it likely isn't. Just correcting your thoughts.
I still think you should look into testing the back pressure of the exhaust.
You can also test it using a vacuum gauge measuring manifold vacuum at idle and at 2000 RPM
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 27, 2023, 10:48 AM
Post #8 of 25
(2176 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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I'd try the vacuum test if you have "actual, manifold vacuum" "T" in a hose. As Hammer said see vacuum at happy idle and again @ 2,000 (no load on it) should be the same.
Off the wall - bent pipe, badly. Risky at age now loosening up exhaust stuff might break.
Vacuum gauge should have (you should) a pointed cone to plain hose on to gauge, Tom
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Hammer Time
Ultimate Carjunky
/ Moderator
Feb 27, 2023, 10:54 AM
Post #9 of 25
(2174 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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No, don't "T" the vacuum. Hook the gauge directly to manifold vacuum to get an accurate reading without another component robbing vacuum from your reading.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Sidom
Veteran
/ Moderator
Feb 27, 2023, 11:02 AM
Post #10 of 25
(2172 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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Yes, data from a scan tool. It can be very helpful sometimes if you can get a capture while the problem is happening. Also put a capture when it's running fine.
As HT said checking back pressure or vacuum may confirm a cat problem. I've seen guys pull upstream O2 sensors to confirm a plugged cat but that can be loud and I wouldn't want to be running around with no O2. the only time I've ever pulled O2s was when the car was a no start and the sensor was easy to get to.
Some sensors, parts can fail without setting a code. At this point I would probably disconnect the MAF and if it idled ok or I could keep it running, I would take it for a ride to see if that had any type of affect on the problem. I would also take a fuel pressure reading and make sure it holds line pressure after the key is turned off.
Yes I saw what you have already replaced but just because some thing is new doesn't mean it's good.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 27, 2023, 2:51 PM
Post #11 of 25
(2152 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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HT - all, my reasoning is not to wreck the way engine runs with a vacuum line working properly + louse up the results. Also reads vacuum or not so looking for alive one all the time. That test works,
Tom
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Hammer Time
Ultimate Carjunky
/ Moderator
Feb 27, 2023, 3:12 PM
Post #12 of 25
(2145 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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The only thing we are testing is the amount of vacuum during the test. He doesn't need to worry about anything else as the test will be completed in a few minutes and everything will be hooked back up.
He is measuring pure vacuum with nothing interfering with the test.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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sarxworks
Novice
Mar 2, 2023, 6:33 PM
Post #13 of 25
(2077 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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Well manifold vaccum looks fine to me. I'm getting a steady 0 psi at idle and when I'm at 2200RPM I getting between 1 and 2 psi
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Hammer Time
Ultimate Carjunky
/ Moderator
Mar 2, 2023, 6:41 PM
Post #14 of 25
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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LOL, vacuum isn't measured in PSI.
There is a specific way to test for a clogged converter with a vacuum gauge. Vacuum is measured in hg.
You should have 18-20 at idle. Then you snap the throttle quickly to 2000 rpm. The vacuum reading should drop and quickly snap back to close to the same reading. If the vacuum reading doesn't come back fully right away, that indicates a restriction.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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sarxworks
Novice
Mar 2, 2023, 6:45 PM
Post #15 of 25
(2068 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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Wait wait I'm not measuring the pressure? Where exactly am I hooking this guage up to? The o2 sensor slot?
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Hammer Time
Ultimate Carjunky
/ Moderator
Mar 2, 2023, 6:50 PM
Post #16 of 25
(2060 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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OK, it's time for you to put the tools down here and take this thing to a professional. You are not even close to understanding this.
It appears you don't know what vacuum is or how to measure it so you will never find the right place to measure it or conduct the test correctly.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
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Mar 2, 2023, 6:53 PM
Post #17 of 25
(2058 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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Vacuum is LACK of atmospheric pressure and how much. We live in about 14.7 PSI will push liquid metal "mercury" (Hg on metals chart) up a vacuum tube in inches - that's the reading of how much vacuum.
T
(This post was edited by Tom Greenleaf on Mar 2, 2023, 6:55 PM)
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sarxworks
Novice
Mar 2, 2023, 7:10 PM
Post #18 of 25
(2050 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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Tbh as much as I agree, I'm being to be in a very tight financial situation here so I'm trying to learn as much as possible to try to figure this out. I actually bought it to the Ford dealer for diagnostics (who charged me out the a$$ and gave me back my car in a worst condition) and a side mechanic who stated my fuel pump was the issue and had it changed but it didn't help.
I understand the difference between pressure and vacuum I I just misread and thought you wanted the pressure from the exhaust manifold.
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Hammer Time
Ultimate Carjunky
/ Moderator
Mar 2, 2023, 7:13 PM
Post #19 of 25
(2046 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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Take it to an exhaust shop and they can check the converter. They probably won't even charge for it.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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sarxworks
Novice
Mar 2, 2023, 7:26 PM
Post #20 of 25
(2042 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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I brought it to a exhaust shop. I was told after he listened while I was accelerating that my convertor was "fine."
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Hammer Time
Ultimate Carjunky
/ Moderator
Mar 2, 2023, 7:30 PM
Post #21 of 25
(2037 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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OK, there doesn't seem to be anything we can do for you. Even the exhaust shop blew you off. He didn't even check.
This is going nowhere.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Mar 2, 2023, 9:12 PM
Post #22 of 25
(2019 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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Sport - Job 1 is now find a real tech that knows their butt from an elbow. Perhaps hidden at another dealer or personally like independents.
This is a trade of assorted other trades all on wheels. Stinks a dealer blew you off as others in this. BTW a dealer isn't branded with brand of car rather has access to more about it really the idea is not to say NO to what is sold there, ever within reason.
Show the tech that gets the job just what it does and when never tell them what item to fix just the problem found and costs up front to continue on.
If one doesn't find the problem IMO (doesn't count out there much) no charge or they ask if they can send it along if necessary?
Bummer about the treatment so far hope not from here this is free to use sorry for typos on my part that also change what I meant if seen I'll fix them.
Get going I suggest networking thru friends who is or has the right tech vs the "star" system all hacked out there!
Tom
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Sidom
Veteran
/ Moderator
Mar 3, 2023, 7:16 AM
Post #23 of 25
(2010 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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Where exactly did you have this gauge hooked up? If you had this hooked into the O2 bunge and you're getting 2 PSI @ 2000 RPM's, then you have an exhaust problem.
Are you able to get any kind of a data stream that you can post?
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Mar 3, 2023, 7:32 AM
Post #24 of 25
(2005 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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? We were doing a vacuum test I thought, sorry if pressure differences before and after an area?
Thread is already way too long, displays a restriction of some kind or least rule it out. I think and said it should go out for pro checking AGAIN this time show the issue in person with the car best - it always is, Tom
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Hammer Time
Ultimate Carjunky
/ Moderator
Mar 3, 2023, 8:48 AM
Post #25 of 25
(2003 views)
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Re: 2005 Ford Focus sudden loss of power and bogging when warm
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This thread has run it's course and there is nothing we can do to diagnose this car given the owner's limited ability and equipment.
Closing this now
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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