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> Perplexed, Santa Fe problems
flcerberus
post Feb 4 2013, 07:20 PM
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Ok I am hoping that the Hyundai dealer can finally figure this out but I am throwing this on here to see if any of the guru's here can help. My wife has a 2002 Santa Fe which due to current living situations is impossible for us to consider replacing. In the past year the car has repeatedly been back to a mechanic because it stumble's almost like a miss fire. After each diagnosis and subsequent repair the car has ran fine for any where from 2 weeks (longest) to less than a day after coming from the shop. We have in the past year replaced the MAF, all 4 catalytic converters, all 4 oxygen sensors, plug wires, plugs, coil packs, battery, alternator and probably not related a power steering pump and hoses. During this entire process the engine has not tripped a CEL or thrown any OBD codes. It is currently being looked at (I am told) by one of only 5 Hyundai master mechanics in the state of FL and it has had him perplexed for 3 days now. It is a 2.7 V-6 GLS 2WD model. Any thoughts are appreciated. This engine was also a warranty replacement when the original failed at 84,000 miles. I am assuming the ECU would have been re-flashed at that point?


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RPW00Mirage
post Feb 4 2013, 07:32 PM
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i doubt the ECU was reflashed due to an engine failure. they have a stout set of parameters and are usually hardy in most weather conditions and atmospheric changes.

that being said, you've already done alot of the due-diligence repair work - it is hard to self diagnose without some sort of hardcore scantool since an obd reader wouldnt show you basic consumption values.. even harder since the vehicle is not throwing codes. with a misfire you should atleast get SOMETHING eventually within 60 miles i would think.


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flcerberus
post Feb 4 2013, 09:49 PM
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My neighbor is a mechanic and has some pretty high end scan tools. We tried two different ones to no avail. Taking it to Hyundai is a last resort at this point in as I really dislike their service dept. here locally. However one would think they have the Hyundai (Special proprietary) tools to figure it out. This makes the 5th Mechanic.


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yjolly
post Feb 4 2013, 10:26 PM
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Has the fuel pump ever been ruled out as the cause?

Yves


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Bobzilla
post Feb 5 2013, 09:37 AM
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Here's my ideas:
upper intake gasket leak (since it has to come off for most of those repairs)
Crank sensor
Cam sensor
crappy parts house plug wires


What brand of plugs/wires were used? I've seen MULTIPLE times crappy parts house wires making a misfire worse. Bosch Platinum plugs are good for that as well.


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flcerberus
post Feb 5 2013, 07:15 PM
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Bob the plugs and wires are Denso. If I don't get answers I will look into the other items you mentioned. Thanks!


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Bobzilla
post Feb 6 2013, 10:26 AM
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Had you said NGK I would have been fine... but I've never used Denso's wires in the past so I can't say anything for or against.


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mlumz
post Feb 6 2013, 11:17 AM
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It could end up being the ECU. I had a similar problem in my 05 Elantra (dealer replaced everything from plugs/plug wires/coilpack/oxygen sesnor) and ended up replacing the ECU and it solved the issue.


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flcerberus
post Feb 6 2013, 03:50 PM
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QUOTE (Bobzilla @ Feb 5 2013, 09:37 AM) *
Here's my ideas:
upper intake gasket leak (since it has to come off for most of those repairs)
Crank sensor
Cam sensor
crappy parts house plug wires


What brand of plugs/wires were used? I've seen MULTIPLE times crappy parts house wires making a misfire worse. Bosch Platinum plugs are good for that as well.


Bob it ended up being , for now, the crank sensor. Debating putting any more money into it or ....


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Bobzilla
post Feb 6 2013, 03:58 PM
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Woo Hoo! I was right! rofl.gif


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Vinnie
post Feb 6 2013, 04:33 PM
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QUOTE (Bobzilla @ Feb 6 2013, 03:58 PM) *
Woo Hoo! I was right! rofl.gif


For that you are banned hahah! Tease.gif


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Bobzilla
post Feb 6 2013, 04:52 PM
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QUOTE (Vinnie @ Feb 6 2013, 04:33 PM) *
For that you are banned hahah! Tease.gif


I didn't know you were a mod on ForteForums too! rofl.gif


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