Sputtering at 4k RPM AND BEYOND - Hyundai Elantra Sport Turbo Forum
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post #1 of 28 (permalink) Old 08-19-2019, 02:41 PM Thread Starter
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Exclamation Sputtering at 4k RPM AND BEYOND

So my 17 es 6spd manual is sputtering after 4k rpm. It seems to be holding power back and jerking me in the car when I floor it after this point. Is this normal for the turbo elantra? I'm at dealer and they say it may be normal for hyundai turbos. They also said that since I have an aftermarket intake and the blow off valve is not connected to the intake that this could be the issue but its only been doing this for a couple months now. I have a 6 inch rubber pipe over the blow off valve and it is venting to atmosphere and have a chair stopper with a clamp around the spot where the hole would be where the blow off valve would connect to the intake. I have been running the car like this for about 6 months or longer now and it just started doing it a short while ago. It mainly jerks me and the rpm jumps around at around 4k when I am in 4th gear and flooring it above 70mph. Please help. The dealer is fucking stupid and has no idea what they are talking about and couldn't give me any advice.

Has anyone else run into this issue at about 70+mph on highway in a manual trans flooring it and the car seems to sputter and jerk you a bit in the car?

Please help!!!
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post #2 of 28 (permalink) Old 08-19-2019, 03:43 PM
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My ES is completely stock internally and I don't have that issue. Has the dealer done a pressure test?


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post #3 of 28 (permalink) Old 08-19-2019, 04:18 PM
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Can you give more detail as to what you mean by "jumps around"?
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post #4 of 28 (permalink) Old 08-19-2019, 04:49 PM Thread Starter
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I floor it from 4th gear and 5th gear above 4k rpm and sometimes the rpm gauge bounces and the car seems like it is holding back power like it doesn't want to go harder. The Dealer said to reinstall the factory intake system and bring it back in and then they would test it, but they said since the k&n cold air intake is not connected directly to the blow off valve that this could potentially be the issue but they have no idea. I took the mechanic for a drive and he stated it seemed like a normal hyundai turbo function.
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post #5 of 28 (permalink) Old 08-19-2019, 04:54 PM Thread Starter
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Here are photos of the set up.
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post #6 of 28 (permalink) Old 08-19-2019, 07:15 PM Thread Starter
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I just put the pipe back on to connect the blow off and the intake and now when I floor it multiple times down the highway it seems to really cut off and cut back on me.
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post #7 of 28 (permalink) Old 08-19-2019, 07:59 PM
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Quote:
Originally Posted by RynoResumes View Post
I floor it from 4th gear and 5th gear above 4k rpm and sometimes the rpm gauge bounces and the car seems like it is holding back power like it doesn't want to go harder. The Dealer said to reinstall the factory intake system and bring it back in and then they would test it, but they said since the k&n cold air intake is not connected directly to the blow off valve that this could potentially be the issue but they have no idea. I took the mechanic for a drive and he stated it seemed like a normal hyundai turbo function.
The car has a map sensor, venting to atmosphere will not harm it.

My guess is that the stock boost control solenoid is acting up. Very common that they fail in high temps. I would start there.

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post #8 of 28 (permalink) Old 08-19-2019, 09:03 PM Thread Starter
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This tube where I have a red arrow pointing to has a crack in it from where the clamp was. I think the stupid mechanic at the dealer moved the clamp and now theres a crack in that tube. Not sure what it goes to
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post #9 of 28 (permalink) Old 08-19-2019, 09:04 PM Thread Starter
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They put the clamp where I have the arrow showing almost in the middle of the tube and it created a small crack. The dealer told me to put back to stock and bring it in. I think the mechanic at the dealer was new and fucking stupid and had no idea what he was talking about.
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post #10 of 28 (permalink) Old 08-19-2019, 09:06 PM Thread Starter
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I will have them check the stock boost solenoid.
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