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Discussion Starter #1
I bought a AEM intake from a previous owner and once installed it seemed to choke up or hesitate once reaching 3.5k -4k rpms. Also got a check engine light which im sure is a CEL code

i read a couple forums with similar problems
Some saying the scoop cause turbulence, a heat shield could fix but it would have to be custom made, or could just be the intake

Does anyone have any ideas on how to fix this issue?
 

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I bought a AEM intake from a previous owner and once installed it seemed to choke up or hesitate once reaching 3.5k -4k rpms. Also got a check engine light which im sure is a CEL code

i read a couple forums with similar problems
Some saying the scoop cause turbulence, a heat shield could fix but it would have to be custom made, or could just be the intake

Does anyone have any ideas on how to fix this issue?
Read the cel code. As far as the scoop. Take it off and see if the issue goes away first.
 

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2002 Lexus IS300
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I have a dcsports intake. No issues. Honestly I don’t see how any bolt on intake for these cars can cause issues. They are so simple to install unless I’m missing something, they shouldn’t give any running issues.
 

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2002 Lexus IS300
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Those codes are pending. As in not actually set yet. I would bet on:

1. MAF is failing or dirty.

2. Vacuum leak somewhere after the MAF (maybe a silicone boot is torn or not properly tightened down, or a vacuum hose is left off somewhere AFTER the MAF)

3. your upstream o2 sensors are slow to react or bad.

My money is on #1 or #2
 

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Discussion Starter #12
Those codes are pending. As in not actually set yet. I would bet on:

1. MAF is failing or dirty.

2. Vacuum leak somewhere after the MAF (maybe a silicone boot is torn or not properly tightened down, or a vacuum hose is left off somewhere AFTER the MAF)

3. your upstream o2 sensors are slow to react or bad.

My money is on #1 or #2
Those codes are pending. As in not actually set yet. I would bet on:

1. MAF is failing or dirty.

2. Vacuum leak somewhere after the MAF (maybe a silicone boot is torn or not properly tightened down, or a vacuum hose is left off somewhere AFTER the MAF)

3. your upstream o2 sensors are slow to react or bad.

My money is on #1 or #2
So MAF is clean i noticed that the vaccuum hose after the MAF is not a really tight fit, the diameter of the intake is a bit smaller than the stock airbox, maybe a smaller hose would work Or maybe i need a stronger clamp so its more snug?
 
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