CEL after installing intake

[shadowvox6]

Group,
I installed an open cone intake on my LXi last weekend. The car runs really well with this on, however I get a Check Engine Light when I let off the gas at higher RPM's. I haven't pulled the codes yet, but wondering if anyone had ideas to look at. If I shift into neutral, and let it freewheel, it won't trip the CEL. If however I downshift, it will trip the light.

Any clues?
This is an 89 LXi sedan 5MT

[dreeeemA]

You should check the code first.. Its hard to tell what is the issue of this kind of situation.

[Civic Accord Honda]

yeah get us the code, nothing i can think of from an intake causing a cel

[Vanilla Sky]

I'd think it would be something triggering an O2 sensor code. Really need to pull the code to find out, though. No reason to just throw money at parts.

[dreeeemA]

You should check the code first.. Its hard to tell what is the issue of this kind of situation.

[A18A]

sounds like a VSS error, my car does the same thing

[shadowvox6]

sounds like a VSS error, my car does the same thing

VSS = Vehicle Speed Sensor?

Interesting??