For more information about O2 sensor and fuel trim diagnostics, refer to Sections 4 and 5 in my eBook available at www.scannerdanner.com. In this video I cov…
For more information about O2 sensor and fuel trim diagnostics, refer to Sections 4 and 5 in my eBook available at www.scannerdanner.com. In this video I cov…
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ur the best I ever seen keep the good work
Good video, I always had a problem reading the fuel trims lol, your videos
are definitely helping, thanks and keep putting cool videos like that one !!
He spoke the truth. Any bank to bank imbalance of airflow on a V-type
engine can cause opposing fuel trims. If the cam timing is off, one bank
doesn’t open the intake valves soon enough and doesn’t consume all of the
available air. This air can go to the other bank causing your imbalance.
You could see similar issues with one side of the exhaust restricted, one
side of the engine worn out, and so on.
Oops! Somebody’s looking for a new job.
Wow fantastic video. Thanks for the the upload. This will be a great help!
It seems to me a lot of shops do not know fuel trim operation strategy.
Another great video Paul,..I have being watching your videos for the last
year i’ve being traveling alot to Mexico due to family situation, and your
videos are awesome you use alot of good techniques I’m from Fresno and my
freinds from AESWAVE.Mario, Gorge ,Carlos recommend your book,which I will
defentely purchase it when i get back to Fresno,thank for sharing your
videos and your experience Paul you are great instructor
With cost savings the way they are today, most manufacturers use the same
connectors for multiple sensors. Isuzu is definitely not the only one. Most
vehicles I have seen share identical O2 sensor connectors. The only
difference being if they are upstream or downstream. In defense though, if
you look closely, that harness had a mounting ring where it was bolted
somewhere, at some point. This falls more on sloppy tear down/rebuild, than
identical connectors.
Yes you were spot on…He had the wires around the wrong way..Another
problem solved.. Cheers!
Mr Danner I love all of what you do to help all levels of mechanics in
general. Thanks.
ScannerDanner at ASA Ilinois C.A.N. 2013 youtube it, youtubers
Wow a negative short term fuel trim number of 65, I have NEVER seen
negative fuel trim numbers like that before, that is intense. Great video
once again Paul
I may have misspoken, but I have seen a jumped belt cause positive trim
numbers on a 4 cylinder. I do not know if I have seen one go rich on a
separate bank. I suppose it is possible on a dohc v type engine.
great video, excellent explanation. Paul is there any possible way you
would have caught the problem without a scan tool?
some luck, a wiring diagram, and a visual inspection of the wire colors
Hi Paul; Another great video…. Got to love other people’s repair attemps
ending up as a “rats” nest in your back yard (LOL). It seems a little weird
that Isuzo engineering would have made such a real BASIC mistake in that
the bank-1/bank-2 wiring harness connectors were not UNIQUE and could be
interchanged??? After running this engine post-FIX, I wonder if there was
any long term engine damage done (totally whacked out fuel mixtures–bank.1
& bank.2) Tom D.
Paul, on a side note (per my previous comment), if this vehicle uses dual
cat-converters, I would bet the one on the over-rich running bank is trash
now based on the on the OBD scope wave-forms shown. Let us know… Thanks,,
Tom D.
awesome video
It’s an Australian car. 2003 Ford Falcon BA XR6. 4.1L straight six cylinder
DOHC with variable cam timing. Known as a Barra 182.
Once again, great instruction Paul
hi Paul ! , at 2:40 you mention that rich/lean codes from different banks
can be caused by a jumped timing belt!I have a hard understanding the
concept of why this can happen! could you elaborate more! thank you much!
Maestro danner . muy buen vídeo .podría hacer algunos en español se lo
agradecería mucho
refresh my memory my friend. I don’t remember. Have you and I talked about
this before?
Paul I am waiting for this video for atleast 3 years and finally saw this
video, this is worth of a million dollar.. because you always told me in
pm, that o2 is crossed, but only today i understand the concept..
not so sure about that but in this case it didn’t, the owner had installed
te HO2 himself and obviusly the MIL came on again, so when I checked it in
the shop the last thing I suspected (before connecting the scan tool) was
the HO2 because it look new. By the way, scan data was fix at 3.27 v which
make me think that this car was a cal. emiss. so we had to call the dealer
to confirm cause there was not emission label under the hood.
HI, PAUL, THIS IS TOO WEIRD AGAIN. YOU ALWAYS SHOW VIDEOS ON VEHICLE
PROBLEMS THAT END UP AT MY SHOP AT THE SAME TIME, LOL I ALMOST HAD THE SAME
PROBLEM WITH A FORD FOCUS THIS WEEK, MAN I JUST KEPT SAYING I WISH PAUL WAS
HERE, BUT I DID FIND THE PROBLEM THANKS TO YOU,
If it’s a 2.2L and it has 2 cats, its California. Federal has only 1 cat
thanks Curt!
Yes Paul. My id in youtube got changed to my full name from sivucit. I
bought lot of vidoes, books and bothered you a lot at many occasions. I
specifically asked this question being one bank going rich and other bank
be low when i bought a video from you. you gave me the answer but only
today i got the insight.. Thanks much.. I think you are gifted to explain
most difficult part as a very simple one. Trust me, this is a difficult
subject to explain.(atleast to me)
What did u guys learn from this?