Last post on Jun 16, 2013 at 2:44 PM
You are in the Hyundai Tucson
What is this discussion about?
Hyundai Tucson, SUV
#29 of 33 Re: Stalling, engine light lit, accelerating problems,smoking [amobofone]
Jun 12, 2012 (1:43 pm)
No, I didn't replace the tank.....way to expencive and lot's of work.
So I made my own dieselfilter inside the tank, wrapped around the stock filter attached to the pump. Capable to pick up A LOT more filth before getting clogged. Works like a dream Basically, my plan is to keep driving it till it stops, then take out the filter and clean it. Still havent had a stop for 2 months now though. Still fighting with the Hyundai dealer here, but doesn't seem to get anywhere, so I have contacted a consumers` council here.
We'll see how it turnes out, but the car will be sold. Never had such a piece of crap.
#30 of 33 Followup: Hyundai Tucson Acceleration Issues [spgandau]
Jun 25, 2012 (4:14 pm)
Jun 22, 2012 updated info:
After doing all the work above, I replaced the ECU with a rebuilt unit. within 100 miles, I got a check engine light. I went to the dealer and asked for a code and explanation. The code was P0420 (catalytic coverter) The technician, after realizing that I was technically-bent gave a reasoned explanation. Basically, he explained that if the catalytic converter was going bad, it could cause the 02 sensors(both of them) to go bad, and cause other check engine lite issues. He also claimed that the catalytic converter should be replaced every 80,000 miles... which was the first that I had heard of this.
I went home, bought a "bolt-fit" catalytic converter from NAPA and replaced my old unit (which now had 150,000+ miles). Dealer wanted $900+ to do the job. I bought the unit, rented an impact wrench to get teh bolts loose, spent 5 hrs working, and paid $300+.
I also sent off my old ECU and had it overhauled. The overhaul report showed the ECU had one capacitor break and spill electrolyte onto the printed circuit board. Several solder joints were poorly done. The overhaul facility cleaned the board, replaced the capacitor and re-soldered several joints.
So....it seems that part of the issue may have been the catalytic converter being old and partially plugged(?)...it seems that 95% clear is enough to cause a catalytic failure code. It also seems that the ECU had also failed and was partially causing some of the seemingly unrelated codes.
I have re-set the check engine light (disconnected the negative terminal on the battery, and removed the 10A ECU fuse and waited overnight). So far, I have driven only 50 miles. Runs OK. My understanding is that if I get the P0420 code again, it is most likely caused by the pre-catalytic units that are integral to each exhaust manifold (V6 2.7 L). They will be an expense that I am not ready to cross. If I get another code, I will probably sell the car and get a different brand altogether....
#31 of 33 issues resolved
Jul 15, 2012 (11:59 am)
I have finally resolved my issues, to my own satisfaction. I will list them in order:
a) The ECU was the utlimate culprit. It was broken inside, and after I had it overhauled, there was no more issues with acceleration problem, hesitation, etc.
b) The check engine light did come on after I initially installed the new ECU. It consisently gave a P0420 code (bank one, which is the aft set of cylinders on the V-6). I had already replaced the catalytic convertor, so I am confident that it was a legitmate code. I did nothing to replace, clean, or deal with the P0420 code.
c) I re-set the ECU--disconnected the battery AND removed the fuse overnight. Then, I drove for 500+ miles. Initially, the light was off for 70 miles, then on until 200+ miles ( I confirmed the codes at Autozone), then it went off and stayed off. Car operated normally, UNTIL the high outside temperatures arrived.....
d) Then, the AC was intermittent. I noticed that the engine began to overheat (it never reached redline), and as the engine temperature rose above normal, the AC began to put out less cold air. Eventually, the AC stopped altogether. Then, as the engine temperature returned to normal, the AC began to work again. As long as the outside air temp was less than 90 degrees F, the AC worked. As the temperature rose above 90, the engine would begin to over heat and the AC would slowly put out less and less cold air until it would only blow HOT air.
e) The check engine light remained OFF through all of this AC problem and engine overheating, so I am confident that the issue of acceleration was resolved with the ECU change. If acceleration is your only issue, I would recommend changing the ECU.
I did the only thing left to do...
I SOLD THE CAR AND BOUGHT A HONDA CR-V.
#32 of 33 Re: Tucson 2009 Issue [ynk4r]
Jun 03, 2013 (11:21 am)
Google (leave spelling errors) " 2008 Tucson GL, 2.0 Auto tranny, intermittent hessitation/loss of power " and there should be a link to the Hyundai forum with a detail probs of my vehicle and repair history.
This vehicle does mostly short trips and in city, 1-5 miles on freeway occasionally. So has 40K plus of just city driving, often engine does not even get warmed up.
O2 sensors were only error codes even after being replaced. Purge valve replaced, did not help. Catalytic converters broke...engine revved up and heard a knocking sound under vehicle. Both cats replaced and new O2 sensors. Problem still existed. Reset ECU and it ran horrid!!! Mass air flow sensor replaced.. Ran great for a month then again intermittent hesitation and died at stopped sign. Before dying, the radio/CD play totally unresponsive to any controls, volume, CD track, power switch...then car died at stop sign. Ran perfect after than and off to the dealer with it....
The head mechanic has been in conversation with Hyundai hotline.
They think it is a Metal Gasket by exhaust manifold that occasionally leaks which can emit vapors causing electrical issues than make the car die. The pressure leaks causes the hesitation. Vehicle is in today to have gasket replaced and the gasket has been redesigned and is not metal so a KNOWN issue.
Tucson Engine same as Elantra according to the head tech who is assigned to work on my vehicle...his daughter has an Elantra and he says not problems ever with it!
I must say my dealer has been fantastic trying to find out probs, given me loaner. Vehicle has been in over 20 times...often I have the oil changed and other general maintenance. They replaced a burned out headlamp free once...was charged the 2nd time for the other headlight. I drive with them on 24/7.
If your dealer can't figure out a problem ask them to call the Hyundai Hotline and speak to them.
There has been a recall but no mention of hessitation issues. I have had the ESC light stay on. The ESC switch was replaced a couple of years ago and that issue was solved....but twice this year had the ESC light come on...which is one of the symptoms of the recall issue affecting some other switch.
Other than the hesitation blues probs above & ESC light issue, the vehicle has been great. Much more reliable than my Ford & Saturn...not as reliable as my B2000 Pickup that ran and ran and ran....but then again it had mostly freeway driving the 1st 100K miles.
#33 of 33 while driving, uncontroled rpm+enormous smoke
Jun 16, 2013 (2:44 pm)
I have a tucson,2007 crdi 2.0 ,210,000 km . smoke,after- normal like nothing
I have a tucson,2007 crdi 2.0 manual gear ,210,000 km .
On 0606-2013 'after driving for two hours i had a low speed section and when i accelerate I suddenly had uncontrolled high pitch rpm+enormous smoke black mostly from the egzoz , i couldn't control the gas and had to shut down engine with key .
Pulled over, tried to start again- it started normally but pressing slightly the gas caused the same .
Shut it again , waited for 4 hours and then it started and drove as like nothing has happened.
So far drove about 200 km more with no sign of trouble!!!
All during the happening no check engine light apppeared !
I had the epr unit replaced and the check engine once lighted but they said it was only un balanced reading .
The car drive about 300 km a week in mixed areas , no terrain, some highways but rarely long distance drive.
so far it is the first time such a thing happens.
What is it ?
thank you .