That's such poor acceleration that something big is wrong. If the check
engine light on, the computer has gone into limp mode due to a bad
oxygen sensor. Also, you should have the catalytic converter checked -
if it's failed/plugged it could cause this.
It's *slightly* possible that a failed VANOS actuator could cause
poor power, but it's usually not bad enough to take away 1/2 your
As the other responder has mentioned, if it seems like the auto
transmission is slipping, the transmission may need servicing
The problem is, you don't know what the problem is. You'd be wise
to spend the $80-$100 for a mechanic with the diagnostic tools to figure
out what the problem is, then go from there.
An O2 sensor and catalytic converter are easy; auto trannies and
the VANOS actuators are jobs for specialists or very experienced
home mechanics, which it doesn't sound like you are.
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