This Santa Fe is going to kill me ! Idle issues !!
 

2007 6 cyl 2.7 FIVE SPEED 152K miles
I've changed out spark plugs, coil packs, crankshaft sensor (and unrelated CLUTCH at $1200!)
STILL doing what it was originally doing !!
I've been advised to replace camshaft sensor. I am getting P0016 code, Bank 1 Sensor A.
Here's the funny thing that no one I know really understands, or will listen to me about and I feel like it could be KEY....When I drive it and it's in gear riding down the road, it rides GREAT, BUT if I allow it to sit in idle like at a light for a few minutes, the engine light flashes and then it will run like ****. HOWEVER If I come to a light, throw it in neutral and use left foot for braking (I'm getting really good at that !), AND keep the gas pedal on a little to keep RPMs at about 1500 every light, the truck never acts stupid !!!???
Does that make ANYONE think that is a 2 + 2 that could add up to 4 ??? That has to mean something to somebody ?? I'm tired of putting money into this thing, but now I have so much invested, I'm stuck getting it running right and running it into the ground. I don't mind, I really love the vehicle believe it or not !!
I've JUST gotten back to work since 'you know' and am terribly broke still scrounging for food ! Don't know how all these ppl are getting all this unemployment money !!?? Anyway, I'm thinking I should find $49 and have a real mechanic put it on a real machine and check ohms and whatever and tell me EXACTLY what is wrong. But my goodness, someone I talk to might understand the relation to keeping RPMs up and it's fine, but nothing, anywhere. I don't want to buy anymore sensors !! Sigh.
Thanks for listening !

The systems on some of the newer vehicles are constantly changing and if the "mechanic" doesn't keep learning , the customer pays, period.!

Just bear with me a minute,
There hasn't been invented a tool yet that will tell you exactly what could be wrong with your vehicle. The tech needs to know and understand how the system works in order to determine when something is not working right or at all. They do have tools to help confirm when certain things are working correctly or not.
All the codes a system will output only tells the tech/mechanic the system that is malfunctioning and not what part of it is defective or malfunctioning.
Special tools are required to verify certain things are taking place at the proper time and place . One of the tools is the repair person's observations and understanding of the system. Not all repair people have this experience and background, so we have to shop around and use personal recommendation and if we are lucky you find that person./shop.
One thing that may be helpful regarding your vehicle, A vacuum leak, can cause a rough idle , but the rough idle will diminish or disappear when RPM is raised.
You might consider asking the repair facility you use to check for that.
Let us know how you make out with this, thanks.

Thank you Hanky ! I knew the RPM might have something to do with this....there actually IS a hose that is near / coming out around the air filter area that is cracked and holding on for dear life.... I will point that out to mechanic. Downshifting (putting clutch down to floor) when AC is on will cut out AC fan for a second and someone said that could be a vacuum issue. All adds up. I will mention all to mechanic. Thanks for responding. I'm over this vehicle ! Will update you.

Quote:

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Originally Posted by hanky (Post 61226)

The systems on some of the newer vehicles are constantly changing and if the "mechanic" doesn't keep learning , the customer pays, period.!

Just bear with me a minute,
There hasn't been invented a tool yet that will tell you exactly what could be wrong with your vehicle. The tech needs to know and understand how the system works in order to determine when something is not working right or at all. They do have tools to help confirm when certain things are working correctly or not.
All the codes a system will output only tells the tech/mechanic the system that is malfunctioning and not what part of it is defective or malfunctioning.
Special tools are required to verify certain things are taking place at the proper time and place . One of the tools is the repair person's observations and understanding of the system. Not all repair people have this experience and background, so we have to shop around and use personal recommendation and if we are lucky you find that person./shop.
One thing that may be helpful regarding your vehicle, A vacuum leak, can cause a rough idle , but the rough idle will diminish or disappear when RPM is raised.
You might consider asking the repair facility you use to check for that.
Let us know how you make out with this, thanks.

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Something a lot of folks don't realize , If you from time to time just look around the engine compartment and become accustomed to where everything is and appears, you would be surprised , with little or no automotive knowledge , how easy it is to spot when something appears different , or has changed. You don't have to be an auto genius to pick up on these little things. We take this ability for granted, but if used some, it is amazing how the images of things change and we DO notice them, but don't sometimes think they are not important.

I think it is related with idle speed control.
In Hyundai Mu, I believe it is integrated in throttle body, not like older engine that have idle control (called IACV).

Did you ever get this figured out? Mine is doing the same. No vacuum leaks

Hi Reezer,
Pretty sure it is a vacuum leak.

Could you tell us how you checked for a vacuum leak and where?

When we have a rough idle problem due to excess unmeasured air getting into the fuel mixture, normally the incoming air is measured along with throttle angle and the fuel injection is adjusted accordingly.
If the problem goes away when we open the throttle to allow more air to come in and that air weight is measured, , the computer takes the other parameters into consideration and adjusts the fuel quantity to be injected.
The engine smooths out because that extra air is now measured. Air leaks from vacuum leaks do not get measured.
Happy hunting.

I covered air intake and did smoke test through brake booster vacuum line

Can I ask what did you use to do the smoke test?

Hyundai Santa Fe bogging down issues
 

My Santa Fe is bogging down when idle and doesn't want to go anywhere then after pumping gas a bunch of times it kicks into gear and I am ok till I get stuck at a light. Then it bogga down again I have to put it in neutral and put my foot on the gas and raise the rpms. I bought the car and the guy had taken out the check engine bulb in the dash board. I went to get inspection found out it was on the said it was bank one and bank two and the crankshaft. Well I changed all that and I still have issues. I took the air compressor blew out my air filter and it ran good for a little while. So could it be my mass air flow? If so could I just clean it or should I replace it?