In this video Ivan ( a SMA Viewer from PA ) and I start a diagnosis on a 2006 Hyundai Tucson that was giving me fits with a P0173 Fuel Trim Malfunction (Bank 2) . First let me say I am thankful…
In this video Ivan ( a SMA Viewer from PA ) and I start a diagnosis on a 2006 Hyundai Tucson that was giving me fits with a P0173 Fuel Trim Malfunction (Bank 2) . First let me say I am thankful…
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Come along on the crazy diagnosis of this Hyundai Tucson 🙂
— Ivan T. & Eric O.
Take it out back add C4 and make it disappear, problem solved.
Bring it to PEP BOYS. lol.
I SUGGESTION CALL PAUL DANNER AND JAMES DANNER.
Look at the variation in INJ B1(ms) vs. INJ B2(ms)….TPS at .3volts seems
low aswell…I do believe I know where this is going…but, I will keep my
trap shut ;)
I’m guessing a small exhaust leak in the front bank letting oxygen in. You
wouldn’t notice it in the higher rpm as much as idle.
RealfixesRealfast had this very same condition on a hyundai and it turned
out to be the intake runner seal, but they had buy the whole intake.
Just a shot, but I’m thinking the manifold has an internal vacuum leak.
Block off the PCV and put a vacuum gauge in the dipstick tube. If it is
pulling more vacuum than it should you may have found your problem. Here is
the test is described.
http://www.dannysengineportal.com/internal-vacuum-leaks-pcv.html
Chris
Realfixesrealfast had a video on a similar problem. He replaced the entire
intake.
https://www.youtube.com/watch?v=VHeRhXoyhgc
My guess is a substituted value on the MAF signal. If I’m right I want a
SMA t-shirt. 😛 https://www.youtube.com/watch?v=EhdnfhiTi5U
Sounds like a bad washer fluid pump. They sometimes get excess clearance
where the chrome conniptor pin rubs the muffler bearing. Just a
thought….. Looks like every damn thing else was checked
You can do a relative compression test with a high probe on negative cable
connected to a scope when cranking to check engine internal condition got
tip from scanner danner videos what did freeze frame data show you I had a
lean code on a Hyundai recently maf read 5.72 g/s when it broke at idle car
not moving never know what you will find
Just need to get a new Bank 2 and accessories,
Wow wow wow. I’m stumped. They did change the pcm?
Could a catalytic converter restriction cause this?
I did have 1 like that with bad intake runner seals, ended up having to
replace the entire intake.
Interesting case study. One of the things that I saw on the codes was the
downstream O2 senor on bank 2. A lot of text says that this sensor is only
used for monitoring of the catalytic efficiency, but it appears that it’s
also used in the fuel strategy to optimize the catalytic converter for it’s
cleanup of the gasses. So, it’s possible that once this heater code set,
the vehicle went into a default mode of a P0173. I would check this first
since it needs repairing anyway. If that didn’t fix the problem, I would
put a scope on the MAF and see what it’s actually doing. And finally, an
internal PVC system leak would be the last on my last. Looking forward to
part 2…
A punched out Converter with O2 emu. LOL
Seen a video from realfixesrealfast about this. It was intake runner seals,
they had to replace the whole intake manifold. But very informative video
can’t wait for part 2.
Nice hat! I work for Toyota/Lexus!
Howdy from Texas, Ivan! Great video guys, this issue is way beyond my
automotive knowledge level. The MAF unplug was interesting, and I waiting
for part two!
Tough car guys, the only thing that makes sense with what you have shown
is that there is a vacuum leak, I believe that the problem is in the upper
intake manifold, it needs to be inspected further specially it’s flap
mechanism because you showed a leak on their shaft linkage and it should
not be ignored!!!
Its about time someone else gets A car from hell it seems like that’s all I
get. Check back pressure on the cats I would say one cat is flowing more
than the other, Unplugging the MAF tells me a air flow problem, I mite be
wrong but its a easy test, I had my ass kicked for a week on A plugged cat
on a 06 Hyundai entourage
Only thing I would have done next is an exhaust back pressure check.
in your running compression test did you compare B1 with one on B2 ,
thinking only B2 you said , but i may of missed it . Could exhaust be
restricted on one bank , but would not think it would do that . I have had
to change intakes like that before to fix issues ,are the runner doors in
intake working right. but not really done much on Hyundai , so i i have no
clue.
check inside the intake manifold. pcv valve working? are the vacuum lines
connected correctly?
Try swapping the O2 sensors? See if the problem follows the sensors.
Bad intake manifold. Check out reafixesrealfast
Incorrect Positive Crankcase Ventilation (PCV) hose connection
I just had a thought : some cars use the downstream O2 for fuel trims.
Crazy I know,but James Danner has a video on a Toyota Highlander where he
changed the rear O2 and fixed the problem.
in my opinion bank 1 has a problem. i believe you covered more than enough
tests for bank 2 while the “hard to reach bank” is always neglected…… i
hate vacuum leaks i have been working 3 days to figure the location of the
leak and i know when i will discover the location it would be right in my
face…
check for crack in exhaust manifold
This series is like a thriller movie for gearheads! As an eyes wide open
DIYer who’s learning this stuff it’s really cool to see these two
objectively working together, with no hint of ego messing things up.
have you checked for an exhaust leak?
If not the intake leak it self, what about the intake actuator diaphragms
or other vacuum components that need vacuum from that bank in engine bay.
What was the response time 02?? P036
You verified both shafts are leaking vacuum maybe one is a little larger
than other. Why don’t you seal them up with silicone to see if they both
have the same reaction when sealed. Wont take long to do just set up time
for silicone.
or better yet try a higher octaned gasoline….
Plus when u rev the engine to see changes in bank2 it did move. but u didnt
see the bank1 i watched few times ,and bank 1 didnt move.u did say anything
about bank1 cus u were fucused on bank 2….
Cool Video ??? ITS A VACUUM LEAK, LOL. JK. A real head scratch-er.
lol. You covered so much. SO The bank is maxed out on STFT and it cant
dump enough fuel to bring the 02 back to Stoick. And set a LT trim,
Right. I’d try 1) make sure you unplug battery and let the adaptive
fuel memory clear. 2) maybe swap Upstream O2s with each other and
DownStream 02 sensors with each other and see if the problem switches
banks. (some cars use rear o2s for fueling sometimes, I don’t know much
about it, LOL?) and check O2 bias voltage for the heck of it 3) Try
applying vacuum to those Intake Variable Vain Vacuum actuators and see it
02 or short term changes. Maybe there is a problem with them not moving
or getting stuck, (I never worked on many of them). 4) clamp off any
vacuum lines or hoses with Vise-Grips (like any PCV, Brake Booster or and
Air-Injection, all external Air Sources, (that seem bank specific).
Maybe try Generic Mode on your Scantool. IDK I am really just
throwing a bunch of stuff at ya, maybe it will spark an Idea. LOL.
I think they had the same problem with the space shuttle keep up the good
work
What happens if you pinch off the brake booster vacuum line?
I bet that flapper shaft boss is egged boss. New intake manifold oughta fix
it.
Cool video, the thing that bugs me a bit is the B2-S2 and B1-S2. Is steady
at around 420-430mv on both banks. Even with that big difference on the
front sensors. I would also expect LTB2 to climbe up not stay at 0. I also
noticed on your pid list that you had a LTADP B1S2/B2S2 option and a LG
term-fuel IDLE B1/B2 Would be cool to see if its any different.
Thanks! Cheers.
Within the first ten minutes, this thing was screaming to me that the front
o2’s are crossed. Maybe even with a downstream.
Did you check the Evap purge valve. They can get stuck and wont always set
a code.
maybe a clogged air filter may caused this problem…. or in some worst
case scenario is a minor intake valve leak in bank 2…..
DAM he is ANNOYING!!!
would try possibly checking for bad 02 sensor or lazy sensor or corrosion
at connector